Investment Strategy	Jun. 30, 2026
State Street SPDR Dow Jones REIT ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Dow Jones U.S. Select REIT Capped Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to provide a measure of real estate securities that serve as proxies for direct real estate investing, in part by excluding securities whose value is not always closely tied to the value of the underlying real estate. The reason for the exclusions is that performance of such securities may be driven by factors other than the value of real estate. The Index is a market capitalization weighted index of publicly traded real estate investment trusts (“REITs”) and is comprised of companies whose charters are the equity ownership and operation of commercial and/or residential real estate and which operate under the REIT Act of 1960.To be included in the Index, a company must be both an equity owner and operator of commercial and/or residential real estate. Businesses excluded from the Index include: those classified under the Dow Jones REIT/RESI Industry Classification Hierarchy and/or Global Industry Classification Standard (GICS) as “Specialty” (i.e., REIT types that cannot be easily classified within the Hierarchy, including timber REITs, railroad REITs and tower REITs), hybrid REITS, mortgage REITs, real estate finance companies, mortgage brokers and bankers, commercial and residential real estate brokers and estate agents, home builders, large landowners and subdividers of unimproved land, as well as companies that have more than 25% of their assets in direct mortgage investments. A company must have a minimum float-adjusted market capitalization of at least $200 million at the time of its inclusion, and at least 75% of the company's total revenue must be derived from the ownership and operation of real estate assets. A stock must have a median daily value traded of at least $5 million for the three-months prior to the rebalancing reference date. The Index is generally rebalanced quarterly, and returns are calculated on a buy and hold basis except as necessary to reflect the occasional occurrence of Index changes in the middle of the month. Each REIT in the Index is weighted by its float-adjusted market capitalization (i.e., each security is weighted to reflect the attainable market capitalization of the security which reflects that portion of securities shares that are accessible to investors), subject to the following constraints applied at each rebalancing: (i) no single company's weight can exceed 10%, and (ii) the aggregate weight of all companies weighing above 4.5% cannot exceed 22.5%. In addition, each company's weight in the Index is reviewed daily and when the sum of companies with a weight greater than 5% exceeds 25%, additional capping is performed, effective after the close of business on the next trading day. The Index is priced daily and is a total return (price and income) benchmark. As of July 31, 2026, the Index comprised 97 REITs.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to provide a measure of real estate securities that serve as proxies for direct real estate investing, in part by excluding securities whose value is not always closely tied to the value of the underlying real estate. The reason for the exclusions is that performance of such securities may be driven by factors other than the value of real estate. The Index is a market capitalization weighted index of publicly traded real estate investment trusts (“REITs”) and is comprised of companies whose charters are the equity ownership and operation of commercial and/or residential real estate and which operate under the REIT Act of 1960.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	To be included in the Index, a company must be both an equity owner and operator of commercial and/or residential real estate. Businesses excluded from the Index include: those classified under the Dow Jones REIT/RESI Industry Classification Hierarchy and/or Global Industry Classification Standard (GICS) as “Specialty” (i.e., REIT types that cannot be easily classified within the Hierarchy, including timber REITs, railroad REITs and tower REITs), hybrid REITS, mortgage REITs, real estate finance companies, mortgage brokers and bankers, commercial and residential real estate brokers and estate agents, home builders, large landowners and subdividers of unimproved land, as well as companies that have more than 25% of their assets in direct mortgage investments. A company must have a minimum float-adjusted market capitalization of at least $200 million at the time of its inclusion, and at least 75% of the company's total revenue must be derived from the ownership and operation of real estate assets. A stock must have a median daily value traded of at least $5 million for the three-months prior to the rebalancing reference date.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR FactSet Innovative Technology ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the FactSet Innovative Technology Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index (including common stock, preferred stock, depositary receipts and shares of other investment companies). The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to its Index.The Index is designed to represent the performance of U.S.-listed stock and American Depository Receipts (“ADRs”) of Technology companies and Technology-related companies (including Electronic Media companies) within the most innovative segments of the Technology sector and Electronic Media sub-sector of the Media sector, as defined by FactSet Research Systems, Inc. (“FactSet” or the “Index Provider”). The Index Provider considers the most innovative segments of the Technology sector and Electronic Media sub-sector to be those with the highest revenue growth and believes that these companies are often involved in cutting edge research, innovative product and service development, disruptive business models, or a combination of these activities. In addition to traditional Technology companies, Electronic Media companies are included in the Index because of their core focus on technology and the integral role technology plays in determining how such companies operate, innovate and compete within their industry. FactSet defines the Technology sector to include Information Technology Services providers, Hardware manufacturers, Software manufacturers, Electronic Components manufacturers, and Manufacturing Equipment and Services providers. FactSet defines the Electronic Media sub-sector to include companies that produce media content in digital format and deliver, distribute and monetize their content via an electronic medium such as the Internet.FactSet sector determinations are based on a comprehensive, structured taxonomy designed to seek to offer precise industry classification of global companies according to the products and services sold by such companies (the “FactSet Revere Hierarchy”). The FactSet Revere Hierarchy reflects a variable depth structure that, with respect to the Index, consists of twelve levels of increasingly specialized Technology or Electronic Media sub-sectors. Technology and electronic media companies are classified or mapped to the sub-sectors from which they each derive 50% or more of their respective revenues. A company will be eligible for inclusion in the Index if it satisfies the following criteria: (i) is mapped to a Technology or Electronic Media sub-sector at the fourth level or lower (levels four through twelve) in the FactSet Revere Hierarchy; (ii) is mapped to a sub-sector in the top quartile of FactSet's composite revenue growth scoring system for the Technology sector or Electronic Media sub-sector (the “revenue growth scoring system”); (iii) has a market capitalization of shares publicly available to investors (i.e., a “float-adjusted” market capitalization) above $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) above 90% or have a float-adjusted market capitalization above $400 million with a float-adjusted liquidity ratio (as defined above) above 150%; (iv) is a U.S.-listed stock or ADR; and (v) has not had an initial public offering of shares within three months of the Review Selection Day (defined below).The Index is equal-weighted to ensure that each of its component securities is represented in approximate equal dollar value at each reconstitution. The Index is capped at a maximum of 100 constituent securities. If there are fewer than 50 stocks suitable for inclusion based on the eligibility criteria, stocks mapped to the next highest-ranked quartile of sub-sectors would be added until the minimum number of Index constituents is met. To ensure that each component stock continues to represent approximate equal market value in the Index, adjustments, if necessary, are made annually after the close of trading on the third Friday of December (the “Reconstitution Day”) based on information as of the last business day two weeks before the Reconstitution Day (the “Review Selection Day”). As of July 31, 2026, the Index was comprised of 97 stocks.The Index is sponsored by FactSet (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to represent the performance of U.S.-listed stock and American Depository Receipts (“ADRs”) of Technology companies and Technology-related companies (including Electronic Media companies) within the most innovative segments of the Technology sector and Electronic Media sub-sector of the Media sector, as defined by FactSet Research Systems, Inc. (“FactSet” or the “Index Provider”). The Index Provider considers the most innovative segments of the Technology sector and Electronic Media sub-sector to be those with the highest revenue growth and believes that these companies are often involved in cutting edge research, innovative product and service development, disruptive business models, or a combination of these activities. In addition to traditional Technology companies, Electronic Media companies are included in the Index because of their core focus on technology and the integral role technology plays in determining how such companies operate, innovate and compete within their industry. FactSet defines the Technology sector to include Information Technology Services providers, Hardware manufacturers, Software manufacturers, Electronic Components manufacturers, and Manufacturing Equipment and Services providers. FactSet defines the Electronic Media sub-sector to include companies that produce media content in digital format and deliver, distribute and monetize their content via an electronic medium such as the Internet.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	FactSet sector determinations are based on a comprehensive, structured taxonomy designed to seek to offer precise industry classification of global companies according to the products and services sold by such companies (the “FactSet Revere Hierarchy”). The FactSet Revere Hierarchy reflects a variable depth structure that, with respect to the Index, consists of twelve levels of increasingly specialized Technology or Electronic Media sub-sectors. Technology and electronic media companies are classified or mapped to the sub-sectors from which they each derive 50% or more of their respective revenues. A company will be eligible for inclusion in the Index if it satisfies the following criteria: (i) is mapped to a Technology or Electronic Media sub-sector at the fourth level or lower (levels four through twelve) in the FactSet Revere Hierarchy; (ii) is mapped to a sub-sector in the top quartile of FactSet's composite revenue growth scoring system for the Technology sector or Electronic Media sub-sector (the “revenue growth scoring system”); (iii) has a market capitalization of shares publicly available to investors (i.e., a “float-adjusted” market capitalization) above $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) above 90% or have a float-adjusted market capitalization above $400 million with a float-adjusted liquidity ratio (as defined above) above 150%; (iv) is a U.S.-listed stock or ADR; and (v) has not had an initial public offering of shares within three months of the Review Selection Day (defined below).
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Global Dow ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of The Global Dow (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is made up of approximately 150 companies from around the world.The companies are selected not just based on size and reputation, but also on their importance in the global economy. The Index has been designed to cover both developed and emerging countries. The Index is equal weighted and will be reset to equal weights annually each September. As of July 31, 2026, the Index comprised 151 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is made up of approximately 150 companies from around the world.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The companies are selected not just based on size and reputation, but also on their importance in the global economy.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR ICE Preferred Securities ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the ICE Exchange-Listed Fixed & Adjustable Rate Preferred Securities Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of non-convertible preferred stock and securities that are functionally equivalent to preferred stock, including, but not limited to, senior and subordinated debt (collectively, “Preferred Securities”). Preferred Securities generally pay fixed rate distributions (but may pay distributions based on adjustable rates) and typically have “preference” over common stock in the payment of distributions and the liquidation of a company's assets — preference means that a company must pay distributions on its Preferred Securities before paying dividends on its common stock, and the claims of Preferred Securities holders are ahead of common stockholders' claims on assets in a corporate liquidation.The Index includes Preferred Securities that meet the following criteria: (i) are non-convertible; (ii) have a par amount of $25; (iii) are primarily listed on the NYSE or NASDAQ exchanges, (iv) have a minimum amount outstanding of $250 million; (v) are U.S. dollar denominated; (vi) are rated investment grade by one of Moody's Investors Service, Inc. or S&P Global Ratings ratings services; (vii) are publicly registered or exempt from registration under the Securities Act of 1933; (viii) have a fixed or floating rate coupon or dividend schedule; (ix) have a minimum average monthly trading volume of at least 250,000 trading units during the preceding six months; and (x) have at least 18 months to final maturity at time of issuance and a minimum remaining term to final maturity of at least one day. The Index may include securities of companies headquartered outside of the United States. The Index does not include auction rate preferred securities, convertible preferred shares, securities with a sinking fund, shares in closed-end funds, purchase units, purchase contracts, corporate pay-in-kind securities and derivative instruments.The Index is modified market capitalization weighted. The aggregate weight of securities of an individual issuer is limited to 5%, and any weight exceeding this limit will be redistributed on a pro-rata basis to securities of issuers that do not exceed the 5% limit. In the event the Index includes securities of fewer than 20 issuers, the aggregate weight of each issuer's securities will be equally weighted and the issuer's individual securities will be weighted on a pro-rata basis. The Index is rebalanced on the last calendar day of each month based on information available up to and including the third business day before the last business day of the month. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial sector, although this may change from time to time. As of July 31, 2026, the Index comprised 163 Preferred Securities.The Index is sponsored by ICE Data Indices, LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of non-convertible preferred stock and securities that are functionally equivalent to preferred stock, including, but not limited to, senior and subordinated debt (collectively, “Preferred Securities”). Preferred Securities generally pay fixed rate distributions (but may pay distributions based on adjustable rates) and typically have “preference” over common stock in the payment of distributions and the liquidation of a company's assets — preference means that a company must pay distributions on its Preferred Securities before paying dividends on its common stock, and the claims of Preferred Securities holders are ahead of common stockholders' claims on assets in a corporate liquidation.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes Preferred Securities that meet the following criteria: (i) are non-convertible; (ii) have a par amount of $25; (iii) are primarily listed on the NYSE or NASDAQ exchanges, (iv) have a minimum amount outstanding of $250 million; (v) are U.S. dollar denominated; (vi) are rated investment grade by one of Moody's Investors Service, Inc. or S&P Global Ratings ratings services; (vii) are publicly registered or exempt from registration under the Securities Act of 1933; (viii) have a fixed or floating rate coupon or dividend schedule; (ix) have a minimum average monthly trading volume of at least 250,000 trading units during the preceding six months; and (x) have at least 18 months to final maturity at time of issuance and a minimum remaining term to final maturity of at least one day. The Index may include securities of companies headquartered outside of the United States. The Index does not include auction rate preferred securities, convertible preferred shares, securities with a sinking fund, shares in closed-end funds, purchase units, purchase contracts, corporate pay-in-kind securities and derivative instruments.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR MSCI USA Gender Diversity ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the MSCI USA Gender Diversity Select Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The MSCI USA Gender Diversity Select Index (the “Index”) is designed to represent the performance of companies that exhibit a commitment towards promoting and maintaining a high level of gender diversity across the different levels within their organization, including their corporate board, executive and senior management, and workforce.The selection universe for the Index includes all constituents in the MSCI USA Index (the “Parent Index”), which is designed to measure the performance of the large- and mid-cap segments of the U.S. market. The Parent Index includes companies classified as United States companies by the Index Provider generally based on the company's country of incorporation and the primary listing of its securities.The Index incorporates certain gender diversity and environmental, social and governance (“ESG”) metrics developed by MSCI ESG Research (a subsidiary of the Index Provider (defined below)) to score and screen each security within the Parent Index. Companies in the Parent Index are first assigned an ESG Controversy Score, which provides an assessment of controversies concerning any negative environmental, social and/or governance impact of a company's operations, products and services. ESG Controversy Scores fall on a 0-10 scale, with 0 representing a company assessed as having involvement in very severe controversies. The Parent Index is screened to remove (i) companies with an ESG Controversy Score of 0 and (ii) companies not assigned an ESG Controversy Score. In addition, the Parent Index is also screened to remove companies with a Labor Rights – Discrimination and Workforce Diversity Controversy score of 0 or 1, which are companies determined as having involvement in certain very severe or severe workforce diversity controversies. Factors affecting this evaluation include, but are not limited to, a history of involvement in discrimination- related legal cases, widespread or egregious instances of discrimination on the basis of sex, race, or ethnicity, resistance to improved practices, and workplace discrimination-related criticism and allegations by non-governmental organizations and/or other third-party observers.The remaining securities are each assigned an MSCI Gender Diversity Score based on two components: a Women Representation Score and a Diversity Management Score. The Women Representation Score reflects 75% of the weight of the MSCI Gender Diversity Score and evaluates each company based on the following criteria and the company's disclosure of such criteria: (i) percent/number of women on the board of directors, (ii) percent of women in executive management positions, (iii) percent of women in senior management positions, and (iv) percent of all employees who are women. The Diversity Management Score represents the remaining 25% of the weight of the MSCI Gender Diversity Score and evaluates each company based on the following criteria: (i) workforce diversity policies and senior management oversight of such policies; (ii) programs to help attract, retain and promote women in the workforce, including explicit quantitative recruitment targets and employee benefits; and (iii) ability to attract, retain and develop human capital based on its provision of benefits, training and development programs, and employee engagement. Companies are not eligible for inclusion in the Index if they have (i) no women serving on the board of directors and no women serving in executive management positions or (ii) a Women Representation Score of 3 or less (based on a 0-10 scale). For each GICS (Global Industry Classification Standard) sector, companies are selected for inclusion in the Index primarily in decreasing order of MSCI Gender Diversity Score until 50% of the free float adjusted market capitalization (calculated by multiplying the number of shares readily available in the market by the price of such shares) of the sector is reached. The selected securities are weighted by the product of their market capitalization weight in the Parent Index and the MSCI Gender Diversity Score. The weights are then distributed proportionally to sum to 100%. Sector weights in the Index are set equal to the corresponding sector weight in the Parent Index. To mitigate concentration risk, each security's weight in the Index is capped at 4.5%, and any weight exceeding this limit will be redistributed on a pro-rata basis to securities that do not exceed the 4.5% limit. The index is rebalanced quarterly, and changes are implemented at the end of February, May, August and November. As of August 31, 2026, a significant portion of the Fund comprised companies in the technology sector, although this may change from time to time. As of July 31, 2026, the Index comprised 231 securities.The Index is sponsored by MSCI, Inc. (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The MSCI USA Gender Diversity Select Index (the “Index”) is designed to represent the performance of companies that exhibit a commitment towards promoting and maintaining a high level of gender diversity across the different levels within their organization, including their corporate board, executive and senior management, and workforce.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The selection universe for the Index includes all constituents in the MSCI USA Index (the “Parent Index”), which is designed to measure the performance of the large- and mid-cap segments of the U.S. market. The Parent Index includes companies classified as United States companies by the Index Provider generally based on the company's country of incorporation and the primary listing of its securities.The Index incorporates certain gender diversity and environmental, social and governance (“ESG”) metrics developed by MSCI ESG Research (a subsidiary of the Index Provider (defined below)) to score and screen each security within the Parent Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR MSCI USA StrategicFactors ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the MSCI USA Factor Mix A-Series Capped Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the equity market performance of large-and mid-cap companies across the U.S. equity market. It aims to represent the performance of a combination of three factors: value, quality, and low volatility. The Index is an equal weighted combination of the following three MSCI Factor Indices in a single composite index: the MSCI USA Value Weighted Index, the MSCI USA Quality Index, and the MSCI USA Minimum Volatility Index (each, a “Component Index”). If the MSCI USA Minimum Volatility Index is not available due to the concentrated nature of its underlying parent index (for example, in the event of a low number of stocks or where a relatively few number of constituents constitutes a large proportion of index weight), the MSCI USA Minimum Volatility Index is replaced with the MSCI USA Risk Weighted Index (if used to replace the MSCI USA Minimum Volatility Index, also a “Component Index”) and the Index is an equal weighted combination of the MSCI USA Value Weighted Index, the MSCI USA Quality Index and the MSCI USA Risk Weighted Index. The Index Provider (defined below) determines if such replacement is necessary and reviews the MSCI USA Minimum Volatility Index for viability on a regular basis. The MSCI USA Value Weighted Index includes publicly-traded companies domiciled in the U.S., weighted to emphasize stocks with lower valuations, by giving higher index weight to stocks with higher values of fundamental variables such as sales, earnings, cash earnings and book value. The MSCI USA Quality Index includes publicly-traded companies domiciled in the U.S., weighted to emphasize stocks with historically high return on equity, stable year-over-year earnings growth, and low financial leverage. The MSCI USA Minimum Volatility Index aims to reflect the performance characteristics of a minimum variance strategy applied to publicly-traded companies domiciled in the U.S. and is weighted to provide the lowest absolute risk within a given set of constraints. The MSCI USA Risk Weighted Index includes publicly-traded companies domiciled in the U.S., and reweights the constituents so that stocks with lower volatility, measured as the weekly return variance over the prior three years, are given higher index weight. Each Component Index is attributed equal weight (1/3) at each rebalancing. All constituents of each Component Index are included in the Index. The weight of each security in the Index is determined based on 1) the security's weight in each underlying Component Index; and 2) the weight of each underlying Component Index in the Index. The Index is then subject to the MSCI A-Series Index Methodology. The MSCI A-Series Index Methodology first seeks to ensure the Index includes at least 25 constituents. In the event the Index does not contain at least 25 constituents, the Index is supplemented by including constituents of the MSCI USA Small Cap Index, selected in decreasing order based on full market capitalization, until the target of 25 constituents is reached. The MSCI A-Series Index Methodology then applies the MSCI 25/50 Index Methodology, which aims to reflect 5/25/50 weight constraints (i.e., no issuer has a weight above 25%, and the sum of weights of all issuers with weights above 5% does not exceed 50%). The Index is rebalanced semi-annually, usually as of the close of the last business day of May and November, coinciding with the semi-annual index reviews of the MSCI Global Investable Market Indices and of each Component Index. As of August 31, 2026, a significant portion of the Fund comprised companies in the technology and financial sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 526 securities.The Index is sponsored by MSCI, Inc. (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the equity market performance of large-and mid-cap companies across the U.S. equity market. It aims to represent the performance of a combination of three factors: value, quality, and low volatility. The Index is an equal weighted combination of the following three MSCI Factor Indices in a single composite index: the MSCI USA Value Weighted Index, the MSCI USA Quality Index, and the MSCI USA Minimum Volatility Index (each, a “Component Index”).
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The MSCI USA Value Weighted Index includes publicly-traded companies domiciled in the U.S., weighted to emphasize stocks with lower valuations, by giving higher index weight to stocks with higher values of fundamental variables such as sales, earnings, cash earnings and book value. The MSCI USA Quality Index includes publicly-traded companies domiciled in the U.S., weighted to emphasize stocks with historically high return on equity, stable year-over-year earnings growth, and low financial leverage. The MSCI USA Minimum Volatility Index aims to reflect the performance characteristics of a minimum variance strategy applied to publicly-traded companies domiciled in the U.S. and is weighted to provide the lowest absolute risk within a given set of constraints. The MSCI USA Risk Weighted Index includes publicly-traded companies domiciled in the U.S., and reweights the constituents so that stocks with lower volatility, measured as the weekly return variance over the prior three years, are given higher index weight.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR NYSE Technology ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the NYSE Technology Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is composed of 35 leading U.S.-listed technology-related companies.The investible universe of the Index comprises all stocks in the Technology sector and technology-related stocks in the Consumer Discretionary sector, as defined by the Index Provider (as defined below) that are listed on major U.S. stock exchanges and meet the following criteria as of the index rebalance reference date: (i) issued by a company with a minimum market capitalization of $2 billion and (ii) have a trailing 3-month average daily traded value of $10 million. Stocks must also meet at least one of the following three revenue- and sales-based criteria: (i) sales from the latest quarter increased compared to sales from the same quarter of the previous year, (ii) have only one consecutive quarter of negative sales growth over the last two years, or (iii) have revenue totals from the last four quarters that classify it within the top 75 companies within the specific industry classification designated to it by the Index Provider. Eligible stocks are then ranked based on market capitalization and liquidity, and the top 35 stocks are selected for inclusion in the Index. At least 75% of the companies included in the Index must be headquartered in the United States. The Index is equal-weighted and rebalanced annually after the close of trading on the third Friday of December. As of July 31, 2026 the Index comprised 35 stocks.The Index is sponsored by ICE Data Indices, LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is composed of 35 leading U.S.-listed technology-related companies.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The investible universe of the Index comprises all stocks in the Technology sector and technology-related stocks in the Consumer Discretionary sector, as defined by the Index Provider (as defined below) that are listed on major U.S. stock exchanges and meet the following criteria as of the index rebalance reference date: (i) issued by a company with a minimum market capitalization of $2 billion and (ii) have a trailing 3-month average daily traded value of $10 million. Stocks must also meet at least one of the following three revenue- and sales-based criteria: (i) sales from the latest quarter increased compared to sales from the same quarter of the previous year, (ii) have only one consecutive quarter of negative sales growth over the last two years, or (iii) have revenue totals from the last four quarters that classify it within the top 75 companies within the specific industry classification designated to it by the Index Provider. Eligible stocks are then ranked based on market capitalization and liquidity, and the top 35 stocks are selected for inclusion in the Index. At least 75% of the companies included in the Index must be headquartered in the United States.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio Nasdaq 100 ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Nasdaq 100 Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of 100 of the largest domestic and international non-financial companies, based on market capitalization, listed on U.S. Nasdaq-affiliated exchanges. Non-financial companies are all companies except for those classified as “financials” companies according to Industry Classification Benchmark (ICB), a product of FTSE International Limited. The selection universe for the Index includes all common stocks, tracking stocks and American Depositary Receipts (“ADRs”), including New York Registry Shares. Real estate investment trusts (REITs), Special Purpose Acquisition Companies (SPACs) and “when-issued” securities, as well as securities issued by companies who have filed for bankruptcy, are not eligible for inclusion in the Index. To be included in the Index, a security must generally (i) have a three-month average daily value traded of at least $5 million and (ii) have traded for at least three full calendar months, not including the month of initial listing, on an eligible exchange (such as any U.S. Nasdaq-affiliated exchange, New York Stock Exchange, NYSE American, or Cboe BZX).Certain newly listed issuers, such as those that are listed via an initial public offering (“IPO”) or ones that were recently listed on an eligible exchange, may be added to the Index on an expedited (“fast entry”) basis if, among other things, they satisfy all applicable eligibility criteria and their market capitalization ranks within the top 40 Index constituents. Such issuers will be evaluated as of the end of their seventh trading day and added to the Index after 15 trading days (except that if the 15th trading day falls in the same month as a scheduled reconstitution or rebalance, then such issuers will either be added to the Index as part of the scheduled reconstitution or rebalance or no sooner than five trading days after the scheduled reconstitution or rebalance, as applicable per the Index methodology). An issuer listed on an eligible exchange for less than three full calendar months may also be added to the Index at a scheduled reconstitution or rebalance if it satisfies all other applicable eligibility criteria and ranks within the top 40 Index constituents as of the applicable reference date. A fast entry addition to the Index will not require removal of another security and may temporarily increase the Index constituent count to more than 100.The Index is modified market capitalization weighted. The Index is reconstituted annually in December and rebalanced quarterly in March, June, and September, and may also experience additional constituent changes in accordance with its methodology. At the December reconstitution, no security may exceed 15% of the Index. At the quarterly rebalance, no issuer may exceed 24% of the weight of the Index. A special reweighting may be conducted at any time if certain weighting restrictions are exceeded based on end-of-day values. As of August 31, 2026, a significant portion of the Fund comprised companies in the technology and consumer discretionary sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 103 stocks.The Index is sponsored by Nasdaq, Inc. (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of 100 of the largest domestic and international non-financial companies, based on market capitalization, listed on U.S. Nasdaq-affiliated exchanges. Non-financial companies are all companies except for those classified as “financials” companies according to Industry Classification Benchmark (ICB), a product of FTSE International Limited.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The selection universe for the Index includes all common stocks, tracking stocks and American Depositary Receipts (“ADRs”), including New York Registry Shares. Real estate investment trusts (REITs), Special Purpose Acquisition Companies (SPACs) and “when-issued” securities, as well as securities issued by companies who have filed for bankruptcy, are not eligible for inclusion in the Index. To be included in the Index, a security must generally (i) have a three-month average daily value traded of at least $5 million and (ii) have traded for at least three full calendar months, not including the month of initial listing, on an eligible exchange (such as any U.S. Nasdaq-affiliated exchange, New York Stock Exchange, NYSE American, or Cboe BZX).
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio SP 1500 Composite Stock Market ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Composite 1500 Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index (including common stock, preferred stock, depositary receipts and shares of other investment companies). The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of the broad exchange-traded U.S. equity securities universe.The Index consists of those stocks included in the S&P 500 Index, the S&P MidCap 400 Index, and the S&P SmallCap 600 Index. Each underlying index includes U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX that meet specific market capitalization requirements. To be included in an underlying index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the Index; (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive aggregate earnings over the four most recent quarters and for the most recent quarter.The Index is float-adjusted market capitalization weighted. Index constituents are added and removed on an as-needed basis. The Index is rebalanced on a quarterly basis in March, June, September and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the technology sector, although this may change from time to time. As of July 31, 2026, the Index comprised 1,505 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of the broad exchange-traded U.S. equity securities universe.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index consists of those stocks included in the S&P 500 Index, the S&P MidCap 400 Index, and the S&P SmallCap 600 Index. Each underlying index includes U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX that meet specific market capitalization requirements. To be included in an underlying index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the Index; (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive aggregate earnings over the four most recent quarters and for the most recent quarter.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio SP 400 Mid Cap ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P MidCap 400 Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of the mid-capitalization segment of the U.S. equity market.The selection universe for the Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations between $8 billion and $22.7 billion and float-adjusted market capitalizations of at least $4 billion at the time of inclusion. These capitalization ranges may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive aggregate earnings over the four most recent quarters and for the most recent quarter. In selecting securities for inclusion in the Index, the Index Provider also considers sector balance by comparing the weight of each GICS (Global Industry Classification Standard) sector in the Index to its weight in the relevant market capitalization range of the S&P Total Market Index.The Index is float-adjusted market capitalization weighted. Index constituents are added and removed on an as-needed basis. The Index is rebalanced on a quarterly basis in March, June, September and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the industrial and financial sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 400 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of the mid-capitalization segment of the U.S. equity market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The selection universe for the Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations between $8 billion and $22.7 billion and float-adjusted market capitalizations of at least $4 billion at the time of inclusion. These capitalization ranges may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive aggregate earnings over the four most recent quarters and for the most recent quarter. In selecting securities for inclusion in the Index, the Index Provider also considers sector balance by comparing the weight of each GICS (Global Industry Classification Standard) sector in the Index to its weight in the relevant market capitalization range of the S&P Total Market Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio SP 500 Growth ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P 500 Growth Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index measures the performance of the large-capitalization growth segment of the U.S. equity market.The Index consists of those stocks in the S&P 500 Index exhibiting the strongest growth characteristics based on: (i) sales growth; (ii) changes in earnings over price; and (iii) momentum. The S&P 500 Index focuses on the large capitalization U.S. equity market, including common stock and real estate investment trusts (“REITs”). The selection universe for the S&P 500 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations of at least $22.7 billion and float-adjusted market capitalizations of at least $11.35 billion at the time of inclusion. The minimum required capitalization may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter. Meeting these criteria does not guarantee automatic inclusion into the Index. Given the limited number of companies that the Index can have and that it must reflect sector representation, some eligible companies may not be added to the Index at a particular time. S&P Dow Jones Indices LLC's Index Committee makes the final determination and approval of all Index constituents. The Index is market capitalization weighted, subject to capping requirements to comply with the Internal Revenue Code of 1986, as amended (the “Code”). The Index is reconstituted annually after the close of business on the third Friday of December and rebalances quarterly after the close of business on the third Friday of March, June, September and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the technology sector, although this may change from time to time. As of July 31, 2026, the Index comprised 147 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index measures the performance of the large-capitalization growth segment of the U.S. equity market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index consists of those stocks in the S&P 500 Index exhibiting the strongest growth characteristics based on: (i) sales growth; (ii) changes in earnings over price; and (iii) momentum. The S&P 500 Index focuses on the large capitalization U.S. equity market, including common stock and real estate investment trusts (“REITs”). The selection universe for the S&P 500 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations of at least $22.7 billion and float-adjusted market capitalizations of at least $11.35 billion at the time of inclusion. The minimum required capitalization may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio SP 500 High Dividend ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P 500 High Dividend Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of 80 high dividend-yielding companies within the S&P 500 Index.The S&P 500 Index focuses on the large capitalization U.S. equity market, including common stock and real estate investment trusts (“REITs”). The selection universe for the S&P 500 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations of at least $22.7 billion and float-adjusted market capitalizations of at least $11.35 billion at the time of inclusion. The minimum required capitalization may be revised by the Index Provider (as defined below) at any time. To determine dividend yield: (i) an indicated dividend is measured by taking the latest dividend paid (excluding special payments) multiplied by the annual frequency of the payment; and (ii) the indicated dividend is then divided by the company's share price as of the rebalancing reference date. Index constituents are equally weighted and the Index is rebalanced semi-annually, in January and July. As of August 31, 2026, a significant portion of the Fund comprised companies in the real estate and consumer staples sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 78 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of 80 high dividend-yielding companies within the S&P 500 Index.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The selection universe for the S&P 500 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations of at least $22.7 billion and float-adjusted market capitalizations of at least $11.35 billion at the time of inclusion. The minimum required capitalization may be revised by the Index Provider (as defined below) at any time. To determine dividend yield: (i) an indicated dividend is measured by taking the latest dividend paid (excluding special payments) multiplied by the annual frequency of the payment; and (ii) the indicated dividend is then divided by the company's share price as of the rebalancing reference date.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio SP 500 Value ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P 500 Value Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index measures the performance of the large-capitalization value segment of the U.S. equity market.The Index consists of those stocks in the S&P 500 Index exhibiting the strongest value characteristics based on: (i) book value to price ratio; (ii) earnings to price ratio; and (iii) sales to price ratio. The S&P 500 Index focuses on the large capitalization U.S. equity market, including common stock and real estate investment trusts (“REITs”). The selection universe for the S&P 500 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations of at least $22.7 billion and float-adjusted market capitalizations of at least $11.35 billion at the time of inclusion. The minimum required capitalization may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter. Meeting these criteria does not guarantee automatic inclusion into the Index. Given the limited number of companies that the Index can have and that it must reflect sector representation, some eligible companies may not be added to the Index at a particular time. S&P Dow Jones Indices LLC's Index Committee makes the final determination and approval of all Index constituents. The Index is market capitalization weighted, subject to capping requirements to comply with the Internal Revenue Code of 1986, as amended (the “Code”). The Index is reconstituted annually after the close of business on the third Friday of December and rebalances quarterly after the close of business on the third Friday of March, June, September and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the technology and financial sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 437 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index measures the performance of the large-capitalization value segment of the U.S. equity market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index consists of those stocks in the S&P 500 Index exhibiting the strongest value characteristics based on: (i) book value to price ratio; (ii) earnings to price ratio; and (iii) sales to price ratio. The S&P 500 Index focuses on the large capitalization U.S. equity market, including common stock and real estate investment trusts (“REITs”). The selection universe for the S&P 500 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations of at least $22.7 billion and float-adjusted market capitalizations of at least $11.35 billion at the time of inclusion. The minimum required capitalization may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio SP 600 Small Cap ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P SmallCap 600 Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index measures the performance of the small-capitalization segment of the U.S. equity market.The selection universe for the Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations between $1.2 billion and $8 billion and float-adjusted market capitalizations of at least $600 million at the time of inclusion. These capitalization ranges may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive aggregate earnings over the four most recent quarters and for the most recent quarter. In selecting securities for inclusion in the Index, the Index Provider also considers sector balance by comparing the weight of each GICS (Global Industry Classification Standard) sector in the Index to its weight in the relevant market capitalization range of the S&P Total Market Index.The Index is float-adjusted market capitalization weighted. Index constituents are added and removed on an as-needed basis. The Index is rebalanced on a quarterly basis in March, June, September and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial and industrial sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 602 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index measures the performance of the small-capitalization segment of the U.S. equity market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The selection universe for the Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations between $1.2 billion and $8 billion and float-adjusted market capitalizations of at least $600 million at the time of inclusion. These capitalization ranges may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float-adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive aggregate earnings over the four most recent quarters and for the most recent quarter. In selecting securities for inclusion in the Index, the Index Provider also considers sector balance by comparing the weight of each GICS (Global Industry Classification Standard) sector in the Index to its weight in the relevant market capitalization range of the S&P Total Market Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio SP Sector Neutral Dividend ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Sector-Neutral High Yield Dividend Aristocrats Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of companies in the S&P Composite 1500 Index (the “Parent Index”) that have followed a policy of increasing or maintaining dividends every year for at least seven consecutive years while maintaining sector weights that correspond to the Parent Index. The Parent Index is designed to measure the performance of the broad exchange-traded U.S. equity securities universe.To be eligible for inclusion in the Index, a company must also have (i) a float-adjusted market capitalization of at least $3 billion ($1.5 billion for current Index constituents) and (ii) a three-month median daily value traded of at least $5 million ($4 million for current Index constituents). After determining the eligible companies, the Index Provider (defined below) calculates the median annual dividend yield of the eligible companies within each Global Industry Classification Standard (GICS) sector to obtain a sector median dividend yield. Eligible companies with dividend yields above their corresponding sector median dividend yield will be selected for inclusion in the Index. At each rebalance, companies within the Index are weighted by float-adjusted market capitalization within their corresponding sector. Each sector is then weighted to mirror the corresponding sector weight within the Parent Index.The Index is reconstituted annually after the closing of the last business day of January and rebalanced quarterly after the closing of the last business day of January, April, July and October. If between annual reviews the Index Provider determines, based on publicly available information, that an Index constituent has omitted a scheduled dividend payment, announced it will cease paying dividends for an undetermined period, or announced a reduced dividend amount and will no longer qualify for the Index at the subsequent reconstitution, the Index constituent will be removed from the Index effective prior to the open of the first business day of the following month. As of August 31, 2026, a significant portion of the Index comprised companies in the technology sector, although this may change from time to time. As of July 31, 2026, the Index comprised 276 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of companies in the S&P Composite 1500 Index (the “Parent Index”) that have followed a policy of increasing or maintaining dividends every year for at least seven consecutive years while maintaining sector weights that correspond to the Parent Index. The Parent Index is designed to measure the performance of the broad exchange-traded U.S. equity securities universe.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	To be eligible for inclusion in the Index, a company must also have (i) a float-adjusted market capitalization of at least $3 billion ($1.5 billion for current Index constituents) and (ii) a three-month median daily value traded of at least $5 million ($4 million for current Index constituents). After determining the eligible companies, the Index Provider (defined below) calculates the median annual dividend yield of the eligible companies within each Global Industry Classification Standard (GICS) sector to obtain a sector median dividend yield. Eligible companies with dividend yields above their corresponding sector median dividend yield will be selected for inclusion in the Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Russell 1000 Low Volatility Focus ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Russell 1000 Low Volatility Focused Factor Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index (including common stock, preferred stock, depositary receipts and shares of other investment companies). The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to reflect the performance of a segment of large-capitalization U.S. equity securities demonstrating a combination of core factors (high value, high quality, and low size characteristics), with a focus factor comprising low volatility characteristics (the “Factor Characteristics”).To construct the Index, Frank Russell Company (the “Index Provider”) utilizes a rules-based multi-factor scoring process that seeks to increase exposure (or “tilt”) to companies in the Russell 1000 Index demonstrating the Factor Characteristics. The Russell 1000 Index is a market-capitalization index that measures the performance of the large-cap segment of the U.S. equity universe. Within the multi-factor scoring process, a specific focus is applied towards a company's volatility factor. Volatility is a statistical measurement of the magnitude of movements in a stock's price over time. Each stock's factor scores are multiplied by the stock's free float market cap weight in the Russell 1000 Index to determine each constituent's weight in the multi-factor Index. Companies in the Russell 1000 Index are excluded from the Index if they do not meet a minimum weight in the Index. A company's volatility factor score is based on the standard deviation of weekly total returns to a company's stock price over the trailing five years ending on the last business day of the month prior to the Index rebalancing month. A company's value factor score is based on cash flow yield, earnings yield, and country relative sales to price ratio, calculated based on the company's total market capitalization and information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's quality factor score is based on return on assets, change in asset turnover, accruals, and leverage, calculated based on information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's size factor score is based on total market capitalization as of the last business day of the month prior to the Index rebalancing month. The weight of each individual stock in the Index is capped at 2000% of the stock's weight in the Russell 1000 Index, and any weight exceeding this limit will be redistributed to all stocks below the limit in proportion to their combination of market capitalization and factor scoring. The weight of each industry in the Index is capped at 120% of the industry's weight in the Russell 1000 Index plus an additional 5%, and any weight exceeding this limit is redistributed to all other industries below the limit in proportion to their combination of market capitalization and factor scoring. The weight of each industry in the Index must be at least 80% of the industry's weight in the Russell 1000 Index less 5%. The weights of any industries below this minimum will be increased to the minimum by redistributing the weights of industries above the minimum in proportion to their combination of market capitalization and factor scoring. The Index is rebalanced annually in June. As of August 31, 2026, a significant portion of the Fund comprised companies in the industrial and financial sectors, although this may change from time to time. As of July 31, 2026 there were approximately 448 securities in the Index.The Index is sponsored by the Index Provider, which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to reflect the performance of a segment of large-capitalization U.S. equity securities demonstrating a combination of core factors (high value, high quality, and low size characteristics), with a focus factor comprising low volatility characteristics (the “Factor Characteristics”).
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	To construct the Index, Frank Russell Company (the “Index Provider”) utilizes a rules-based multi-factor scoring process that seeks to increase exposure (or “tilt”) to companies in the Russell 1000 Index demonstrating the Factor Characteristics. The Russell 1000 Index is a market-capitalization index that measures the performance of the large-cap segment of the U.S. equity universe. Within the multi-factor scoring process, a specific focus is applied towards a company's volatility factor. Volatility is a statistical measurement of the magnitude of movements in a stock's price over time. Each stock's factor scores are multiplied by the stock's free float market cap weight in the Russell 1000 Index to determine each constituent's weight in the multi-factor Index. Companies in the Russell 1000 Index are excluded from the Index if they do not meet a minimum weight in the Index. A company's volatility factor score is based on the standard deviation of weekly total returns to a company's stock price over the trailing five years ending on the last business day of the month prior to the Index rebalancing month. A company's value factor score is based on cash flow yield, earnings yield, and country relative sales to price ratio, calculated based on the company's total market capitalization and information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's quality factor score is based on return on assets, change in asset turnover, accruals, and leverage, calculated based on information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's size factor score is based on total market capitalization as of the last business day of the month prior to the Index rebalancing month
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Russell 1000 Momentum Focus ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Russell 1000 Momentum Focused Factor Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index (including common stock, preferred stock, depositary receipts and shares of other investment companies). The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to reflect the performance of a segment of large-capitalization U.S. equity securities demonstrating a combination of core factors (high value, high quality, and low size characteristics), with a focus factor comprising high momentum characteristics (the “Factor Characteristics”).To construct the Index, Frank Russell Company (the “Index Provider”) utilizes a rules-based multi-factor scoring process that seeks to increase exposure (or “tilt”) to companies in the Russell 1000 Index demonstrating the Factor Characteristics. The Russell 1000 Index is a market-capitalization index that measures the performance of the large-cap segment of the U.S. equity universe. Within the multi-factor scoring process, a specific focus is applied towards a company's momentum factor. Companies with higher momentum are those whose securities have had higher recent price performance compared to other securities. Each stock's factor scores are multiplied by the stock's free float market cap weight in the Russell 1000 Index to determine each constituent's weight in the multi-factor Index. Companies in the Russell 1000 Index are excluded from the Index if they do not meet a minimum weight in the Index. A company's momentum factor score is based on historical total return over the 11 months ending on the last business day of the month prior to the Index rebalancing month. A company's value factor score is based on cash flow yield, earnings yield, and country relative sales to price ratio, calculated based on the company's total market capitalization and information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's quality factor score is based on return on assets, change in asset turnover, accruals, and leverage, calculated based on information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's size factor score is based on total market capitalization as of the last business day of the month prior to the Index rebalancing month.The weight of each individual stock in the Index is capped at 2000% of the stock's weight in the Russell 1000 Index, and any weight exceeding this limit will be redistributed to all stocks below the limit in proportion to their combination of market capitalization and factor scoring. The weight of each industry in the Index is capped at 120% of the industry's weight in the Russell 1000 Index plus an additional 5%, and any weight exceeding this limit is redistributed to all other industries below the limit in proportion to their combination of market capitalization and factor scoring. The weight of each industry in the Index must be at least 80% of the industry's weight in the Russell 1000 Index less 5%. The weights of any industries below this minimum will be increased to the minimum by redistributing the weights of industries above the minimum in proportion to their combination of market capitalization and factor scoring. The Index is rebalanced semi-annually in June and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the industrial sector, although this may change from time to time. As of July 31, 2026 there were approximately 933 securities in the Index.The Index is sponsored by the Index Provider, which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to reflect the performance of a segment of large-capitalization U.S. equity securities demonstrating a combination of core factors (high value, high quality, and low size characteristics), with a focus factor comprising high momentum characteristics (the “Factor Characteristics”).
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	To construct the Index, Frank Russell Company (the “Index Provider”) utilizes a rules-based multi-factor scoring process that seeks to increase exposure (or “tilt”) to companies in the Russell 1000 Index demonstrating the Factor Characteristics. The Russell 1000 Index is a market-capitalization index that measures the performance of the large-cap segment of the U.S. equity universe. Within the multi-factor scoring process, a specific focus is applied towards a company's momentum factor. Companies with higher momentum are those whose securities have had higher recent price performance compared to other securities. Each stock's factor scores are multiplied by the stock's free float market cap weight in the Russell 1000 Index to determine each constituent's weight in the multi-factor Index. Companies in the Russell 1000 Index are excluded from the Index if they do not meet a minimum weight in the Index. A company's momentum factor score is based on historical total return over the 11 months ending on the last business day of the month prior to the Index rebalancing month. A company's value factor score is based on cash flow yield, earnings yield, and country relative sales to price ratio, calculated based on the company's total market capitalization and information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's quality factor score is based on return on assets, change in asset turnover, accruals, and leverage, calculated based on information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's size factor score is based on total market capitalization as of the last business day of the month prior to the Index rebalancing month.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Russell 1000 Yield Focus ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Russell 1000 Yield Focused Factor Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index (including common stock, preferred stock, depositary receipts and shares of other investment companies). The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to reflect the performance of a segment of large-capitalization U.S. equity securities demonstrating a combination of core factors (high value, high quality, and low size characteristics), with a focus factor comprising high yield characteristics (the “Factor Characteristics”).To construct the Index, Frank Russell Company (the “Index Provider”) utilizes a rules-based multi-factor scoring process that seeks to increase exposure (or “tilt”) to companies in the Russell 1000 Index demonstrating the Factor Characteristics. The Russell 1000 Index is a market-capitalization index that measures the performance of the large-cap segment of the U.S. equity universe. Within the multi-factor scoring process, a specific focus is applied towards a company's yield factor. Companies with higher yield are those whose securities have paid higher dividends compared to other securities. Each stock's factor scores are multiplied by the stock's free float market cap weight in the Russell 1000 Index to determine each constituent's weight in the multi-factor Index. Companies in the Russell 1000 Index are excluded from the Index if they do not meet a minimum weight in the Index. A company's yield factor score is based on 12-month trailing dividend yield as of the last business day of the month prior to the Index rebalancing month. A company's value factor score is based on cash flow yield, earnings yield, and country relative sales to price ratio, calculated based on the company's total market capitalization and information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's quality factor score is based on return on assets, change in asset turnover, accruals, and leverage, calculated based on information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's size factor score is based on the total market capitalization as of the last business day of the month prior to the Index rebalancing month.The weight of each individual stock in the Index is capped at 2000% of the stock's weight in the Russell 1000 Index, and any weight exceeding this limit will be redistributed to all stocks below the limit in proportion to their combination of market capitalization and factor scoring. The weight of each industry in the Index is capped at 120% of the industry's weight in the Russell 1000 Index plus an additional 5%, and any weight exceeding this limit is redistributed to all other industries below the limit in proportion to their combination of market capitalization and factor scoring. The weight of each industry in the Index must be at least 80% of the industry's weight in the Russell 1000 Index less 5%. The weights of any industries below this minimum will be increased to the minimum by redistributing the weights of industries above the minimum in proportion to their combination of market capitalization and factor scoring. The Index is rebalanced annually in June. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial and industrial sectors, although this may change from time to time. As of July 31, 2026, there were approximately 299 securities in the Index.The Index is sponsored by the Index Provider, which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to reflect the performance of a segment of large-capitalization U.S. equity securities demonstrating a combination of core factors (high value, high quality, and low size characteristics), with a focus factor comprising high yield characteristics (the “Factor Characteristics”).
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	To construct the Index, Frank Russell Company (the “Index Provider”) utilizes a rules-based multi-factor scoring process that seeks to increase exposure (or “tilt”) to companies in the Russell 1000 Index demonstrating the Factor Characteristics. The Russell 1000 Index is a market-capitalization index that measures the performance of the large-cap segment of the U.S. equity universe. Within the multi-factor scoring process, a specific focus is applied towards a company's yield factor. Companies with higher yield are those whose securities have paid higher dividends compared to other securities. Each stock's factor scores are multiplied by the stock's free float market cap weight in the Russell 1000 Index to determine each constituent's weight in the multi-factor Index. Companies in the Russell 1000 Index are excluded from the Index if they do not meet a minimum weight in the Index. A company's yield factor score is based on 12-month trailing dividend yield as of the last business day of the month prior to the Index rebalancing month. A company's value factor score is based on cash flow yield, earnings yield, and country relative sales to price ratio, calculated based on the company's total market capitalization and information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's quality factor score is based on return on assets, change in asset turnover, accruals, and leverage, calculated based on information reported in the company's most recent annual financial statement as of the last business day of the month prior to the Index rebalancing month. A company's size factor score is based on the total market capitalization as of the last business day of the month prior to the Index rebalancing month.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP 1500 Momentum Tilt ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P 1500 Positive Momentum Tilt Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index applies an alternative weighting methodology to the S&P Composite 1500 Index so that stocks with relatively strong momentum are overweight relative to the S&P Composite 1500 Index and stocks with relatively weak momentum are underweight. The S&P Composite 1500 Index, one of the leading indices of the U.S. equity market, is a capitalization-weighted combination of the large-cap S&P 500 Index, the S&P MidCap 400 Index, and the S&P SmallCap 600 Index. A “momentum” style of investing emphasizes investing in securities that have had higher recent price performance compared to other securities.In constructing the Index, the Index Provider (as defined below) estimates the momentum of each stock in the S&P Composite 1500 Index based on its 11-month total return ending on the rebalancing reference date and ranks all 1,500 Index constituents in order of momentum. S&P then forms 20 sub-portfolios of approximately equal market capitalization, grouped by momentum. S&P determines each sub-portfolio allocation so that a sub-portfolio with relatively high momentum will have a higher allocation than a sub-portfolio with relatively low momentum. The weight of each stock in the Index is proportional to its market capitalization and to its sub-portfolio allocation. The Index is rebalanced quarterly, effective after the close on the third Friday of January, April, July, and October. As of August 31, 2026, a significant portion of the Fund comprised companies in the technology sector, although this may change from time to time. As of July 31, 2026, there were approximately 1,497 securities in the Index.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index applies an alternative weighting methodology to the S&P Composite 1500 Index so that stocks with relatively strong momentum are overweight relative to the S&P Composite 1500 Index and stocks with relatively weak momentum are underweight. The S&P Composite 1500 Index, one of the leading indices of the U.S. equity market, is a capitalization-weighted combination of the large-cap S&P 500 Index, the S&P MidCap 400 Index, and the S&P SmallCap 600 Index. A “momentum” style of investing emphasizes investing in securities that have had higher recent price performance compared to other securities.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	In constructing the Index, the Index Provider (as defined below) estimates the momentum of each stock in the S&P Composite 1500 Index based on its 11-month total return ending on the rebalancing reference date and ranks all 1,500 Index constituents in order of momentum. S&P then forms 20 sub-portfolios of approximately equal market capitalization, grouped by momentum. S&P determines each sub-portfolio allocation so that a sub-portfolio with relatively high momentum will have a higher allocation than a sub-portfolio with relatively low momentum.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP 1500 Value Tilt ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P 1500 Low Valuation Tilt Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index applies an alternative weighting methodology to the S&P Composite 1500 Index so that stocks with relatively low valuations (i.e., relatively “cheap”) are overweight relative to the S&P Composite 1500 Index and stocks with relatively high valuations (i.e., relatively “rich”) are underweight. The S&P Composite 1500 Index, one of the leading indices of the U.S. equity market, is a capitalization-weighted combination of the large-cap S&P 500 Index, the S&P MidCap 400 Index, and the S&P SmallCap 600 Index.In constructing the Index, the Index Provider (as defined below) estimates the valuation of each stock in the S&P Composite 1500 Index based on the ratio of its price to its reported book value and last 12 months level of earnings, cash flow, sales, and dividends. S&P weights this data from the last five calendar years to create a composite valuation measure, and ranks all 1,500 index constituents in order of composite valuation. S&P then forms 20 sub-portfolios of approximately equal market capitalization, grouped by composite valuations. S&P derives a sub-portfolio allocation factor using each sub-portfolio's composite valuation, so that a sub-portfolio with relatively low valuation will have a higher allocation factor than a sub-portfolio with relatively high valuation. The weight of each stock in the Index is proportionate to its market capitalization and to its sub-portfolio allocation factor. The Index is rebalanced annually after the close of business on the third Friday of April. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial and technology sectors, although this may change from time to time. As of July 31, 2026, there were approximately 1,465 securities in the Index.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index applies an alternative weighting methodology to the S&P Composite 1500 Index so that stocks with relatively low valuations (i.e., relatively “cheap”) are overweight relative to the S&P Composite 1500 Index and stocks with relatively high valuations (i.e., relatively “rich”) are underweight. The S&P Composite 1500 Index, one of the leading indices of the U.S. equity market, is a capitalization-weighted combination of the large-cap S&P 500 Index, the S&P MidCap 400 Index, and the S&P SmallCap 600 Index.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	In constructing the Index, the Index Provider (as defined below) estimates the valuation of each stock in the S&P Composite 1500 Index based on the ratio of its price to its reported book value and last 12 months level of earnings, cash flow, sales, and dividends. S&P weights this data from the last five calendar years to create a composite valuation measure, and ranks all 1,500 index constituents in order of composite valuation. S&P then forms 20 sub-portfolios of approximately equal market capitalization, grouped by composite valuations. S&P derives a sub-portfolio allocation factor using each sub-portfolio's composite valuation, so that a sub-portfolio with relatively low valuation will have a higher allocation factor than a sub-portfolio with relatively high valuation.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP 400 Mid Cap Growth ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P MidCap 400 Growth Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index measures the performance of the mid-capitalization growth segment of the U.S. equity market.The Index consists of those stocks in the S&P MidCap 400 Index exhibiting the strongest growth characteristics based on: (i) sales growth; (ii) changes in earnings over price; and (iii) momentum. The selection universe for the S&P MidCap 400 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with market capitalizations between $8 billion and $22.7 billion at the time of inclusion. This capitalization range may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter. The Index is market capitalization weighted, subject to capping requirements to comply with the Internal Revenue Code of 1986, as amended (the “Code”). The Index is reconstituted annually after the close of business on the third Friday of December and rebalances quarterly after the close of business on the third Friday of March, June, September and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the industrial, technology and health care sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 245 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index measures the performance of the mid-capitalization growth segment of the U.S. equity market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index consists of those stocks in the S&P MidCap 400 Index exhibiting the strongest growth characteristics based on: (i) sales growth; (ii) changes in earnings over price; and (iii) momentum. The selection universe for the S&P MidCap 400 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with market capitalizations between $8 billion and $22.7 billion at the time of inclusion. This capitalization range may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP 400 Mid Cap Value ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P MidCap 400 Value Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index measures the performance of the mid-capitalization value segment of the U.S. equity market.The Index consists of those stocks in the S&P MidCap 400 Index exhibiting the strongest value characteristics based on: (i) book value to price ratio; (ii) earnings to price ratio; and (iii) sales to price ratio. The selection universe for the S&P MidCap 400 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with market capitalizations between $8 billion and $22.7 billion at the time of inclusion. This capitalization range may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter. The Index is market capitalization weighted, subject to capping requirements to comply with the Internal Revenue Code of 1986, as amended (the “Code”). The Index is reconstituted annually after the close of business on the third Friday of December and rebalances quarterly after the close of business on the third Friday of March, June, September and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial and industrial sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 297 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index measures the performance of the mid-capitalization value segment of the U.S. equity market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index consists of those stocks in the S&P MidCap 400 Index exhibiting the strongest value characteristics based on: (i) book value to price ratio; (ii) earnings to price ratio; and (iii) sales to price ratio. The selection universe for the S&P MidCap 400 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with market capitalizations between $8 billion and $22.7 billion at the time of inclusion. This capitalization range may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP 500 Fossil Fuel Reserves Free ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P 500 Fossil Fuel Reserves Free Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index (including common stock, preferred stock, depositary receipts and shares of other investment companies). The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of companies in the S&P 500 Index that are “fossil fuel reserves free,” as determined by S&P Trucost Limited through its review of publicly available information, such as annual reports and other company publications. For purposes of the composition of the Index, fossil fuel reserves are defined as proved and probable (i) thermal coal reserves, (ii) other non-metallurgical coal reserves (e.g., coal for chemical biproducts, coal briquettes, residential use, liquid fuel, cement production, paper manufacturing, pharmaceutical, alumina refineries, ferrochrome, anthracite) (iii) conventional or unconventional oil reserves (e.g., natural gas liquids, oil sands, condensates and liquid petroleum gas), (iv) natural gas reserves, (v) shale gas reserves, and (vi) oil and gas reserves that have not been disclosed transparently as specific types of oil or gas, or are disclosed as one aggregate quantity of oil and gas reserves combined.The Index is a subset of the S&P 500 Index (the “Underlying Index”), which serves as the initial universe of eligible securities for the Index. The Underlying Index focuses on the large capitalization U.S. equity market, including common stock and real estate investment trusts (“REITs”). The selection universe for the S&P 500 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations of at least $22.7 billion and float-adjusted market capitalizations of at least $11.35 billion at the time of inclusion. The minimum required capitalization may be revised by the Index Provider (as defined below) at any time. In constructing the Index, the initial universe is screened in an effort to exclude companies with any ownership of proved or probable fossil fuel reserves, including for third-party and in-house power generation.The Index is weighted by float-adjusted market capitalization. The Index is rebalanced quarterly after the close of business on the third Friday of March, June, September, and December. The rebalancing reference dates are after the close of the third Friday of February, May, August, and November, respectively. New additions to the Underlying Index are reviewed for inclusion in the Index each quarter, provided they have been added to the Underlying Index by the Index rebalancing reference dates. Fossil fuel reserve ownership information is updated as part of each quarterly rebalancing. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial and industrial sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 488 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of companies in the S&P 500 Index that are “fossil fuel reserves free,” as determined by S&P Trucost Limited through its review of publicly available information, such as annual reports and other company publications. For purposes of the composition of the Index, fossil fuel reserves are defined as proved and probable (i) thermal coal reserves, (ii) other non-metallurgical coal reserves (e.g., coal for chemical biproducts, coal briquettes, residential use, liquid fuel, cement production, paper manufacturing, pharmaceutical, alumina refineries, ferrochrome, anthracite) (iii) conventional or unconventional oil reserves (e.g., natural gas liquids, oil sands, condensates and liquid petroleum gas), (iv) natural gas reserves, (v) shale gas reserves, and (vi) oil and gas reserves that have not been disclosed transparently as specific types of oil or gas, or are disclosed as one aggregate quantity of oil and gas reserves combined.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is a subset of the S&P 500 Index (the “Underlying Index”), which serves as the initial universe of eligible securities for the Index. The Underlying Index focuses on the large capitalization U.S. equity market, including common stock and real estate investment trusts (“REITs”). The selection universe for the S&P 500 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with unadjusted market capitalizations of at least $22.7 billion and float-adjusted market capitalizations of at least $11.35 billion at the time of inclusion. The minimum required capitalization may be revised by the Index Provider (as defined below) at any time. In constructing the Index, the initial universe is screened in an effort to exclude companies with any ownership of proved or probable fossil fuel reserves, including for third-party and in-house power generation.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP 500 Scored and Screened ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P 500 Scored & Screened Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of securities meeting certain sustainability criteria (criteria related to ESG factors), while maintaining similar overall industry group weights as the S&P 500 Index.Securities eligible for inclusion in the Index comprise all constituents of the S&P 500 Index except for:•Companies that meet any of the following Business Involvement Exclusions, based on revenue levels as determined by S&P Global, Inc. (an affiliate of the Index Provider (defined below)):•Companies that derive any amount of revenue from manufacturing tobacco products, 5% or greater of their revenue from supplying products and services essential for the tobacco industry, or 5% or greater of their revenue from the distribution and/or retail sale of tobacco products;•“Controversial Weapons Companies,” defined as companies that derive any amount of revenue from (i) manufacturing components intended solely for use in the production of and are essential for the functioning of anti-personnel mines, biological and chemical weapons, blinding laser weapons, cluster munitions, depleted uranium, incendiary weapons and nuclear weapons (collectively, “Controversial Weapons”), or (ii) products and/or services related to the sale, supply and transfer of Controversial Weapons;•Companies that derive 5% or greater of their revenue from the extraction and/or production of fossil fuels from oil/tar sands;•Companies that (i) derive any amount of revenue from the manufacturing of small arms weapons for civilian or non-civilian use, or key components of assault weapons; or (ii) derive 5% or greater of their revenue from the retail or distribution of small arms weapons for civilian customers; •Companies that derive 10% or greater of their revenue from (i) manufacturing, assembling, selling and transporting weapons, equipment, structures, and vehicles, or providing vehicle and equipment maintenance services and logistics and operations support, specifically for the purposes of warfare, or (ii) manufacturing and selling military weapon-related products; or•Companies that derive 5% or greater of their revenue from (i) owning and/or operating coal mines that engage in thermal coal mining or (ii) electricity generation using coal powered plants. •Companies that hold 25% or greater ownership stakes (as determined by S&P Global, Inc.) in:•Companies that derive any amount of revenue from manufacturing tobacco products; •Controversial Weapons Companies; or•Companies that derive any amount of revenue from the manufacturing of small arms weapons for civilian and non-civilian use, or key components of assault weapons.•Companies that are classified by Sustainalytics to be non-compliant with the United Nations Global Compact (“UNGC”) principles (“Non-Compliant UNGC Companies”). Non-Compliant UNGC Companies are (i) companies found to have been responsible for egregious and severe violations of commonly accepted international norms related to human rights, labor rights, the environment and business ethics, or (ii) companies deemed to facilitate third parties in human rights violations due to their involvement in certain weapons with disproportional and/or non-discriminatory impact on citizens and society;•Companies that have an S&P Global ESG Score that falls within the worst 25% of scores from each Global Industry Classification Standard (GICS) industry group in the underlying universe of companies eligible for inclusion in the Index (the “Investment Universe”); or•Companies that do not have (i) coverage for determining tobacco-, controversial weapons-, oil sands-, small arms-, military weapons- and thermal coal-related involvement or compliance with UNGC principles; or (ii) an S&P Global ESG Score.S&P Global ESG Scores are assigned by S&P Global, Inc. using its Corporate Sustainability Assessment, which is an annual evaluation of a company, based on ESG factors that S&P Global, Inc. determines are financially material to the company, relative to its industry peer companies.After implementing the exclusion criteria described above, the remaining companies are then ranked based on their S&P Global ESG Score. For each GICS industry group, companies are selected for inclusion in the Index primarily in decreasing order of S&P Global ESG Score until approximately 75% of the float adjusted market capitalization of the industry group is reached.The Index is float-adjusted market capitalization weighted. A company's float-adjusted market capitalization is calculated by multiplying the number of shares readily available in the market by the price of such shares. The Index is reconstituted and rebalanced annually on the last business day in April based on information as of the last trading date in March. In addition, companies will be removed from the Index (i) on the last business day of July, October and January, if found to meet a Business Involvement Exclusion as of the last business day of the previous month, or (ii) on the third Friday of March, June, September and December if found to be a Non-Compliant UNGC Company as of the last business day of the previous month. In addition, between Index rebalances, Index constituents may be removed from the Index for their involvement in economic crime and corruption, fraud, illegal commercial practices, human rights abuses, labor disputes, workplace safety catastrophic accidents, environmental disasters, and certain other activities associated with environmental, social and governance risks. Any companies removed from the Index on account of such activities are not eligible for inclusion in the Index until one full calendar year from the next rebalancing of the Index. As of August 31, 2026, a significant portion of the Fund comprised companies in the technology sector, although this may change from time to time. As of July 31, 2026, the Index comprised of 328 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of securities meeting certain sustainability criteria (criteria related to ESG factors), while maintaining similar overall industry group weights as the S&P 500 Index.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	Securities eligible for inclusion in the Index comprise all constituents of the S&P 500 Index except for:•Companies that meet any of the following Business Involvement Exclusions, based on revenue levels as determined by S&P Global, Inc. (an affiliate of the Index Provider (defined below)):•Companies that derive any amount of revenue from manufacturing tobacco products, 5% or greater of their revenue from supplying products and services essential for the tobacco industry, or 5% or greater of their revenue from the distribution and/or retail sale of tobacco products;•“Controversial Weapons Companies,” defined as companies that derive any amount of revenue from (i) manufacturing components intended solely for use in the production of and are essential for the functioning of anti-personnel mines, biological and chemical weapons, blinding laser weapons, cluster munitions, depleted uranium, incendiary weapons and nuclear weapons (collectively, “Controversial Weapons”), or (ii) products and/or services related to the sale, supply and transfer of Controversial Weapons;•Companies that derive 5% or greater of their revenue from the extraction and/or production of fossil fuels from oil/tar sands;•Companies that (i) derive any amount of revenue from the manufacturing of small arms weapons for civilian or non-civilian use, or key components of assault weapons; or (ii) derive 5% or greater of their revenue from the retail or distribution of small arms weapons for civilian customers; •Companies that derive 10% or greater of their revenue from (i) manufacturing, assembling, selling and transporting weapons, equipment, structures, and vehicles, or providing vehicle and equipment maintenance services and logistics and operations support, specifically for the purposes of warfare, or (ii) manufacturing and selling military weapon-related products; or•Companies that derive 5% or greater of their revenue from (i) owning and/or operating coal mines that engage in thermal coal mining or (ii) electricity generation using coal powered plants. •Companies that hold 25% or greater ownership stakes (as determined by S&P Global, Inc.) in:•Companies that derive any amount of revenue from manufacturing tobacco products; •Controversial Weapons Companies; or•Companies that derive any amount of revenue from the manufacturing of small arms weapons for civilian and non-civilian use, or key components of assault weapons.•Companies that are classified by Sustainalytics to be non-compliant with the United Nations Global Compact (“UNGC”) principles (“Non-Compliant UNGC Companies”). Non-Compliant UNGC Companies are (i) companies found to have been responsible for egregious and severe violations of commonly accepted international norms related to human rights, labor rights, the environment and business ethics, or (ii) companies deemed to facilitate third parties in human rights violations due to their involvement in certain weapons with disproportional and/or non-discriminatory impact on citizens and society;•Companies that have an S&P Global ESG Score that falls within the worst 25% of scores from each Global Industry Classification Standard (GICS) industry group in the underlying universe of companies eligible for inclusion in the Index (the “Investment Universe”); or•Companies that do not have (i) coverage for determining tobacco-, controversial weapons-, oil sands-, small arms-, military weapons- and thermal coal-related involvement or compliance with UNGC principles; or (ii) an S&P Global ESG Score.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP 600 Small Cap Growth ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P SmallCap 600 Growth Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index measures the performance of the small-capitalization growth segment of the U.S. equity market.The Index consists of those stocks in the S&P SmallCap 600 Index exhibiting the strongest growth characteristics based on: (i) sales growth; (ii) changes in earnings over price; and (iii) momentum. The selection universe for the S&P SmallCap 600 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with market capitalizations between $1.2 billion and $8 billion at the time of inclusion. This capitalization range may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter. The Index is market capitalization weighted, subject to capping requirements to comply with the Internal Revenue Code of 1986, as amended (the “Code”). The Index is reconstituted annually after the close of business on the third Friday of December and rebalances quarterly after the close of business on the third Friday of March, June, September and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the industrial and financial sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 347 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index measures the performance of the small-capitalization growth segment of the U.S. equity market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index consists of those stocks in the S&P SmallCap 600 Index exhibiting the strongest growth characteristics based on: (i) sales growth; (ii) changes in earnings over price; and (iii) momentum. The selection universe for the S&P SmallCap 600 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with market capitalizations between $1.2 billion and $8 billion at the time of inclusion. This capitalization range may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP 600 Small Cap Value ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P SmallCap 600 Value Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index measures the performance of the small-capitalization value segment of the U.S. equity market.The Index consists of those stocks in the S&P SmallCap 600 Index exhibiting the strongest value characteristics based on: (i) book value to price ratio; (ii) earnings to price ratio; and (iii) sales to price ratio. The selection universe for the S&P SmallCap 600 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with market capitalizations between $1.2 billion and $8 billion at the time of inclusion. The capitalization range may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter. The Index is market capitalization weighted, subject to capping requirements to comply with the Internal Revenue Code of 1986, as amended (the “Code”). The Index is reconstituted annually after the close of business on the third Friday of December and rebalances quarterly after the close of business on the third Friday of March, June, September and December. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial and consumer discretionary sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 461 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index measures the performance of the small-capitalization value segment of the U.S. equity market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index consists of those stocks in the S&P SmallCap 600 Index exhibiting the strongest value characteristics based on: (i) book value to price ratio; (ii) earnings to price ratio; and (iii) sales to price ratio. The selection universe for the S&P SmallCap 600 Index includes all U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX with market capitalizations between $1.2 billion and $8 billion at the time of inclusion. The capitalization range may be revised by the Index Provider (as defined below) at any time. To be included in the Index, a security (or issuer of a security, as applicable) should (i) have an annual dollar value traded to float adjusted market capitalization ratio of 0.75 or greater at the time of addition to the S&P Composite 1500 Index (the Index's parent index); (ii) trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; (iii) have a public float of at least 10%; and (iv) have positive as-reported earnings over the most recent four consecutive quarters (measured using the sum of earnings over those quarters) and for the most recent quarter.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Aerospace and Defense ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Aerospace & Defense Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the aerospace and defense segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The aerospace & defense segment of the S&P TMI comprises the Aerospace & Defense sub-industry.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Aerospace & Defense sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 47 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the aerospace and defense segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The aerospace & defense segment of the S&P TMI comprises the Aerospace & Defense sub-industry.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Aerospace & Defense sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Bank ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Banks Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the banks segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The banks segment of the S&P TMI comprises the following sub-industries: Asset Management & Custody Banks, Diversified Banks, Regional Banks, Diversified Financial Services, and Commercial & Residential Mortgage Finance.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Asset Management & Custody Banks, Diversified Banks, Regional Banks, Diversified Financial Services, and Commercial & Residential Mortgage Finance sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization above $2 billion with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) above 100%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $1 billion or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 103 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the banks segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The banks segment of the S&P TMI comprises the following sub-industries: Asset Management & Custody Banks, Diversified Banks, Regional Banks, Diversified Financial Services, and Commercial & Residential Mortgage Finance.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Asset Management & Custody Banks, Diversified Banks, Regional Banks, Diversified Financial Services, and Commercial & Residential Mortgage Finance sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization above $2 billion with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) above 100%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $1 billion or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Biotech ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Biotechnology Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the biotechnology segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The biotechnology segment of the S&P TMI comprises the Biotechnology sub-industry.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Biotechnology sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. If there are fewer than 35 stocks, stocks from the Life Sciences Tools & Services sub-industry that meet the market capitalization and liquidity thresholds are included in order of their float-adjusted market capitalization from largest to smallest. If there continues to be fewer than 22 stocks, the market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions.The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 147 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the biotechnology segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The biotechnology segment of the S&P TMI comprises the Biotechnology sub-industry.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Biotechnology sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. If there are fewer than 35 stocks, stocks from the Life Sciences Tools & Services sub-industry that meet the market capitalization and liquidity thresholds are included in order of their float-adjusted market capitalization from largest to smallest. If there continues to be fewer than 22 stocks, the market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Capital Markets ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Capital Markets Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the capital markets segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The capital markets segment of the S&P TMI comprises the following sub-industries: Asset Management & Custody Banks, Diversified Capital Markets, Financial Exchanges & Data, and Investment Banking & Brokerage.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Asset Management & Custody Banks, Diversified Capital Markets, Financial Exchanges & Data, and Investment Banking & Brokerage sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 65 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the capital markets segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The capital markets segment of the S&P TMI comprises the following sub-industries: Asset Management & Custody Banks, Diversified Capital Markets, Financial Exchanges & Data, and Investment Banking & Brokerage.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Asset Management & Custody Banks, Diversified Capital Markets, Financial Exchanges & Data, and Investment Banking & Brokerage sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Dividend ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P High Yield Dividend Aristocrats Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Swaps and futures contracts (each, a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of the highest dividend yielding S&P Composite 1500 Index (the “Parent Index”) constituents that have followed a managed-dividends policy of consistently increasing dividends every year for at least 20 consecutive years. The Parent Index is designed to measure the performance of the broad exchange-traded US equity securities universe.To be eligible for inclusion in the Index, a company must also (i) have a float-adjusted market capitalization of at least $2 billion ($1.5 billion for current Index constituents) and (ii) have a minimum three-month average daily value traded of at least $5 million ($4 million for current Index constituents). Stocks within the Index are weighted by indicated yield (annualized gross dividend payment per share divided by price per share), subject to the following constraints: (i) no stock can have a weight greater than 4% in the Index; (ii) no stock can have a weight greater than 30 times its weight in the Parent Index; and (iii) no stock can have a weight greater than the ratio of its three-month average daily value traded divided by $2 billion. The Index components are reviewed annually in January for continued inclusion in the Index and re-weighted quarterly after the closing of the last business day of January, April, July and October. If between annual reviews the Index Provider (as defined below) determines, based on publicly available information, that an Index constituent has omitted a scheduled dividend payment, announced it will cease paying dividends for an undetermined period, or announced a reduced dividend amount and will no longer qualify for the Index at the subsequent reconstitution, the Index constituent will be removed from the index effective prior to the open of the first business day of the following month. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial, utilities and real estate sectors, although this may change from time to time. As of July 31, 2026, the Index comprised 155 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of the highest dividend yielding S&P Composite 1500 Index (the “Parent Index”) constituents that have followed a managed-dividends policy of consistently increasing dividends every year for at least 20 consecutive years. The Parent Index is designed to measure the performance of the broad exchange-traded US equity securities universe.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	To be eligible for inclusion in the Index, a company must also (i) have a float-adjusted market capitalization of at least $2 billion ($1.5 billion for current Index constituents) and (ii) have a minimum three-month average daily value traded of at least $5 million ($4 million for current Index constituents). Stocks within the Index are weighted by indicated yield (annualized gross dividend payment per share divided by price per share), subject to the following constraints: (i) no stock can have a weight greater than 4% in the Index; (ii) no stock can have a weight greater than 30 times its weight in the Parent Index; and (iii) no stock can have a weight greater than the ratio of its three-month average daily value traded divided by $2 billion.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Health Care Equipment ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Health Care Equipment Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the health care equipment segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The health care equipment segment of the S&P TMI comprises the following sub-industries: Health Care Equipment and Health Care Supplies.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Health Care Equipment and Health Care Services sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 66 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the health care equipment segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The health care equipment segment of the S&P TMI comprises the following sub-industries: Health Care Equipment and Health Care Supplies.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Health Care Equipment and Health Care Services sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Health Care Services ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Health Care Services Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the health care services segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The health care services segment of the S&P TMI comprises the following sub-industries: Health Care Distributors, Health Care Facilities, Health Care Services, and Managed Health Care.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Health Care Distributors, Health Care Facilities, Health Care Services, and Managed Health Care sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 60 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the health care services segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The health care services segment of the S&P TMI comprises the following sub-industries: Health Care Distributors, Health Care Facilities, Health Care Services, and Managed Health Care.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Health Care Distributors, Health Care Facilities, Health Care Services, and Managed Health Care sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Homebuilders ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Homebuilders Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the homebuilders segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The homebuilders segment of the S&P TMI comprises the Homebuilding sub-industry.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Homebuilding sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. If there are fewer than 35 stocks, stocks from the Building Products, Home Furnishings, Home Improvement Retail, Homefurnishing Retail, or Household Appliances sub-industries that meet the market capitalization and liquidity thresholds are included in order of their float-adjusted market capitalization from largest to smallest. If there continues to be fewer than 22 stocks, the market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 33 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the homebuilders segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The homebuilders segment of the S&P TMI comprises the Homebuilding sub-industry.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Homebuilding sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Insurance ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Insurance Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the insurance segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The insurance segment of the S&P TMI comprises the following sub-industries: Insurance Brokers, Life & Health Insurance, Multi-Line Insurance, Property & Casualty Insurance, and Reinsurance.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Insurance Brokers, Life & Health Insurance, Multi-Line Insurance, Property & Casualty Insurance, and Reinsurance sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization above $2 billion with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) above 90%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $1 billion or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 53 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the insurance segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The insurance segment of the S&P TMI comprises the following sub-industries: Insurance Brokers, Life & Health Insurance, Multi-Line Insurance, Property & Casualty Insurance, and Reinsurance.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Insurance Brokers, Life & Health Insurance, Multi-Line Insurance, Property & Casualty Insurance, and Reinsurance sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization above $2 billion with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) above 90%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Kensho Final Frontiers ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Kensho Final Frontiers Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Final Frontiers sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind the exploration of deep space and deep sea. In particular, the Index comprises the components of the S&P Kensho Space Index and the deep sea exploration components of the S&P Kensho Drones Index (the “Underlying Indexes”) as of the Index's reconstitution reference date.The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Space Index seeks to track companies that produce products and services that enable space travel and exploration, or are a necessary component of the supply chain for such products and services. The S&P Kensho Drones Index seeks to track companies that produce products and services related to the remotely-operated or unmanned aerial, underwater and surface-level drones market, or are a necessary component of the supply chain for such products and services.To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.Underlying Index constituents are then categorized as either “Core” or “Non-Core.” A company is categorized as Core if its products and services related to the Underlying Index's objective are identified in its regulatory filings as principal components of the company's strategy. Products and services are deemed to be principal components of a company's strategy if the company's regulatory filing disclosures regarding such products and services are determined to be sufficiently prominent according to a proprietary algorithm of the Index Provider which calculates prominence based on the frequency and position of such disclosures within regulatory filings. A company may also be categorized as Core if the Index Provider determines that the majority of the company's revenue is derived from products and services related to the Underlying Index's objective as indicated by the company's reported business segments, which is assessed by scanning the S&P Capital IQ Database for annual fiscal year revenue segment reporting. All other companies are categorized as Non-Core, including companies whose products and services are identified as forming a necessary component of the supply chain of the segment targeted by the Underlying Index. An Index constituent categorized as Core by at least one of the Underlying Indexes will be categorized as Core for purposes of the Index. At the time of each rebalance, to tilt the Index's exposure toward Core Index Constituents, the Core Index Constituents are systematically overweighted relative to the Non-Core Index Constituents. Each Core Index Constituent and Non-Core Index Constituent is then equally weighted within the group of Core Index Constituents and Non-Core Index Constituents, respectively, subject to liquidity and diversification adjustments.The Index is reconstituted and rebalanced after the close of trading on the third Friday in June with a reference date as of the close of the last trading day in May. In addition, the Index is rebalanced after the close of trading on the third Friday of December with a reference date as of the close of the last trading day in November. In connection with the December rebalance, Index constituents are also evaluated for continued inclusion in the Index if a new eligible regulatory filing has been filed since the last reconstitution review. As of July 31, 2026, the Index comprised 37 securities.The Index Provider is not affiliated with the Fund or the Adviser. The Index Provider establishes and maintains rules which are used to determine the composition of the Index and relative weightings of the securities in the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Final Frontiers sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind the exploration of deep space and deep sea. In particular, the Index comprises the components of the S&P Kensho Space Index and the deep sea exploration components of the S&P Kensho Drones Index (the “Underlying Indexes”) as of the Index's reconstitution reference date.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Space Index seeks to track companies that produce products and services that enable space travel and exploration, or are a necessary component of the supply chain for such products and services. The S&P Kensho Drones Index seeks to track companies that produce products and services related to the remotely-operated or unmanned aerial, underwater and surface-level drones market, or are a necessary component of the supply chain for such products and services.To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Kensho Future Security ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Kensho Future Security Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Future Security sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind future security. In particular, the Index comprises the components of the S&P Kensho Cyber Security Index and the S&P Kensho Smart Borders Index, and the military components of the S&P Kensho Robotics Index, the S&P Kensho Drones Index, the S&P Kensho Space Index, the S&P Kensho Wearables Index and the S&P Kensho Virtual Reality Index (the “Underlying Indexes”) as of the Index's reconstitution reference date.The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Cyber Security Index seeks to track companies that focus on protecting enterprises and devices from unauthorized access via electronic means and, produce products and services that protect enterprises, homes and portable devices from unauthorized access via electronic means, or are a necessary component of the supply chain for such products and services. The S&P Kensho Smart Borders Index seeks to track companies that produce products and services that secure borders and critical infrastructure, or are a necessary component of the supply chain for such products and services. The S&P Kensho Robotics Index seeks to track companies that produce products and services to build robotic products and their subsystems, or are a necessary component of the supply chain for such products and services. The S&P Kensho Drones Index seeks to track companies that produce products and services related to the remotely-operated or unmanned aerial, underwater and surface-level drones market and related subsystems, or are a necessary component of the supply chain for such products and services. The S&P Kensho Space Index seeks to track companies that produce products and services that enable space travel and exploration, or are a necessary component of the supply chain for such products and services. The S&P Kensho Wearables Index seeks to track companies that produce products and services related to wearable technologies for consumer, military or medical uses, or are a necessary component of the supply chain for such products and services. The S&P Kensho Virtual Reality Index seeks to track companies that produce products and services related to virtual or augmented reality activities, or are a necessary component of the supply chain for such products and services.To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.Underlying Index constituents are then categorized as either “Core” or “Non-Core.” A company is categorized as Core if its products and services related to the Underlying Index's objective are identified in its regulatory filings as principal components of the company's strategy. Products and services are deemed to be principal components of a company's strategy if the company's regulatory filing disclosures regarding such products and services are determined to be sufficiently prominent according to a proprietary algorithm of the Index Provider which calculates prominence based on the frequency and position of such disclosures within regulatory filings. A company may also be categorized as Core if the Index Provider determines that the majority of the company's revenue is derived from products and services related to the Underlying Index's objective as indicated by the company's reported business segments, which is assessed by scanning the S&P Capital IQ Database for annual fiscal year revenue segment reporting. All other companies are categorized as Non-Core, including companies whose products and services are identified as forming a necessary component of the supply chain of the segment targeted by the Underlying Index. An Index constituent categorized as Core by at least one of the Underlying Indexes will be categorized as Core for purposes of the Index. To tilt the Index's exposure toward Core Index Constituents, at the time of each rebalance the aggregate weighting of Core Index Constituents is based on the proportion of the number of Core Index Constituents, plus an overweight factor of up to 20%. At the time of each rebalance, each Core Index Constituent and Non-Core Index Constituent is equally weighted within the group of Core Index Constituents and Non-Core Index Constituents, respectively, subject to liquidity and diversification adjustments.The Index is reconstituted and rebalanced after the close of trading on the third Friday in June with a reference date as of the close of the last trading day in May. In addition, the Index is rebalanced after the close of trading on the third Friday of December with a reference date as of the close of the last trading day in November. In connection with the December rebalance, Index constituents are also evaluated for continued inclusion in the Index if a new eligible regulatory filing has been filed since the last reconstitution review. As of July 31, 2026, the Index comprised 78 securities.The Index Provider is not affiliated with the Fund or the Adviser. The Index Provider establishes and maintains rules which are used to determine the composition of the Index and relative weightings of the securities in the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Future Security sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind future security. In particular, the Index comprises the components of the S&P Kensho Cyber Security Index and the S&P Kensho Smart Borders Index, and the military components of the S&P Kensho Robotics Index, the S&P Kensho Drones Index, the S&P Kensho Space Index, the S&P Kensho Wearables Index and the S&P Kensho Virtual Reality Index (the “Underlying Indexes”) as of the Index's reconstitution reference date.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Cyber Security Index seeks to track companies that focus on protecting enterprises and devices from unauthorized access via electronic means and, produce products and services that protect enterprises, homes and portable devices from unauthorized access via electronic means, or are a necessary component of the supply chain for such products and services. The S&P Kensho Smart Borders Index seeks to track companies that produce products and services that secure borders and critical infrastructure, or are a necessary component of the supply chain for such products and services. The S&P Kensho Robotics Index seeks to track companies that produce products and services to build robotic products and their subsystems, or are a necessary component of the supply chain for such products and services. The S&P Kensho Drones Index seeks to track companies that produce products and services related to the remotely-operated or unmanned aerial, underwater and surface-level drones market and related subsystems, or are a necessary component of the supply chain for such products and services. The S&P Kensho Space Index seeks to track companies that produce products and services that enable space travel and exploration, or are a necessary component of the supply chain for such products and services. The S&P Kensho Wearables Index seeks to track companies that produce products and services related to wearable technologies for consumer, military or medical uses, or are a necessary component of the supply chain for such products and services. The S&P Kensho Virtual Reality Index seeks to track companies that produce products and services related to virtual or augmented reality activities, or are a necessary component of the supply chain for such products and services.To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Kensho Grid Innovation ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Kensho Clean Power Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Clean Power sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind clean power. In particular, the Index comprises the components of the S&P Kensho Cleantech Index focused on clean energy technology (hardware, software, and construction and installation of materials used for capturing energy, as well as advanced energy storage devices), and the S&P Kensho Clean Energy Index focused on clean energy generation (generation and transmission of power derived from clean energy sources) (the “Underlying Indexes”) as of the Index's reconstitution reference date.The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Cleantech Index seeks to track companies focused on building technologies or products that enable generation of energy in a clean manner (solar, wind, geothermal, hydrogen and hydroelectric). The S&P Kensho Clean Energy Index seeks to track companies focused on the generation and transmission of energy derived from clean sources (solar, wind, geothermal, hydrogen and hydroelectric).To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.Underlying Index constituents are then categorized as either “Core” or “Non-Core.” A company is categorized as Core if its products and services related to the Underlying Index's objective are identified in its regulatory filings as principal components of the company's strategy. Products and services are deemed to be principal components of a company's strategy if the company's regulatory filing disclosures regarding such products and services are determined to be sufficiently prominent according to a proprietary algorithm of the Index Provider which calculates prominence based on the frequency and position of such disclosures within regulatory filings. A company may also be categorized as Core if the Index Provider determines that the majority of the company's revenue is derived from products and services related to the Underlying Index's objective as indicated by the company's reported business segments, which is assessed by scanning the S&P Capital IQ Database for annual fiscal year revenue segment reporting. All other companies are categorized as Non-Core, including companies whose products and services are identified as forming a necessary component of the supply chain of the segment targeted by the Underlying Index. An Index constituent categorized as Core by at least one of the Underlying Indexes will be categorized as Core for purposes of the Index. At the time of each rebalance, to tilt the Index's exposure toward Core Index Constituents, the Core Index Constituents are systematically overweighted relative to the Non-Core Index Constituents. Each Core Index Constituent and Non-Core Index Constituent is then equally weighted within the group of Core Index Constituents and Non-Core Index Constituents, respectively, subject to liquidity and diversification adjustments.The Index is reconstituted and rebalanced after the close of trading on the third Friday in June with a reference date as of the close of the last trading day in May. In addition, the Index is rebalanced after the close of trading on the third Friday of December with a reference date as of the close of the last trading day in November. In connection with the December rebalance, Index constituents are also evaluated for continued inclusion in the Index if a new eligible regulatory filing has been filed since the last reconstitution review. As of July 31, 2026, the Index comprised 40 securities.The Index Provider is not affiliated with the Fund or the Adviser. The Index Provider establishes and maintains rules which are used to determine the composition of the Index and relative weightings of the securities in the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Clean Power sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind clean power. In particular, the Index comprises the components of the S&P Kensho Cleantech Index focused on clean energy technology (hardware, software, and construction and installation of materials used for capturing energy, as well as advanced energy storage devices), and the S&P Kensho Clean Energy Index focused on clean energy generation (generation and transmission of power derived from clean energy sources) (the “Underlying Indexes”) as of the Index's reconstitution reference date.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Cleantech Index seeks to track companies focused on building technologies or products that enable generation of energy in a clean manner (solar, wind, geothermal, hydrogen and hydroelectric). The S&P Kensho Clean Energy Index seeks to track companies focused on the generation and transmission of energy derived from clean sources (solar, wind, geothermal, hydrogen and hydroelectric).To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Kensho Intelligent Structures ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Kensho Intelligent Infrastructure Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Intelligent Infrastructure sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind intelligent infrastructure. In particular, the Index comprises the components of the (i) S&P Kensho Smart Grids Index focused on power grid technologies (with an emphasis on efficient management and use of energy, and improved power grid reliability), transportation infrastructure (with an emphasis on enhancing the efficiency of transportation infrastructure, as well as the new infrastructure capabilities required for alternative modes of transportation such as autonomous vehicles), and water infrastructure (with an emphasis on water conversion and increasing the water supply), and (ii) the S&P Kensho Smart Buildings Index focused on intelligent and connected home technologies and building automation infrastructure (the “Underlying Indexes”) as of the Index's reconstitution reference date.The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Smart Grids Index seeks to track companies that provide next generation products and services related to power, water and transportation infrastructures, or are a necessary component of the supply chain for such products and services. The S&P Kensho Smart Buildings Index seeks to track companies that produce products and services that enable buildings to become more connected, intelligent and adaptive, or are a necessary component of the supply chain for such products and services.To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.Underlying Index constituents are then categorized as either “Core” or “Non-Core.” A company is categorized as Core if its products and services related to the Underlying Index's objective are identified in its regulatory filings as principal components of the company's strategy. Products and services are deemed to be principal components of a company's strategy if the company's regulatory filing disclosures regarding such products and services are determined to be sufficiently prominent according to a proprietary algorithm of the Index Provider which calculates prominence based on the frequency and position of such disclosures within regulatory filings. A company may also be categorized as Core if the Index Provider determines that the majority of the company's revenue is derived from products and services related to the Underlying Index's objective as indicated by the company's reported business segments, which is assessed by scanning the S&P Capital IQ Database for annual fiscal year revenue segment reporting. All other companies are categorized as Non-Core, including companies whose products and services are identified as forming a necessary component of the supply chain of the segment targeted by the Underlying Index. An Index constituent categorized as Core by at least one of the Underlying Indexes will be categorized as Core for purposes of the Index. To tilt the Index's exposure toward Core Index Constituents, at the time of each rebalance the aggregate weighting of Core Index Constituents is based on the proportion of the number of Core Index Constituents, plus an overweight factor of up to 20%. At the time of each rebalance, each Core Index Constituent and Non-Core Index Constituent is equally weighted within the group of Core Index Constituents and Non-Core Index Constituents, respectively, subject to liquidity and diversification adjustments.The Index is reconstituted and rebalanced after the close of trading on the third Friday in June with a reference date as of the close of the last trading day in May. In addition, the Index is rebalanced after the close of trading on the third Friday of December with a reference date as of the close of the last trading day in November. In connection with the December rebalance, Index constituents are also evaluated for continued inclusion in the Index if a new eligible regulatory filing has been filed since the last reconstitution review. As of July 31, 2026, the Index comprised 52 securities.The Index Provider is not affiliated with the Fund or the Adviser. The Index Provider establishes and maintains rules which are used to determine the composition of the Index and relative weightings of the securities in the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Intelligent Infrastructure sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind intelligent infrastructure. In particular, the Index comprises the components of the (i) S&P Kensho Smart Grids Index focused on power grid technologies (with an emphasis on efficient management and use of energy, and improved power grid reliability), transportation infrastructure (with an emphasis on enhancing the efficiency of transportation infrastructure, as well as the new infrastructure capabilities required for alternative modes of transportation such as autonomous vehicles), and water infrastructure (with an emphasis on water conversion and increasing the water supply), and (ii) the S&P Kensho Smart Buildings Index focused on intelligent and connected home technologies and building automation infrastructure (the “Underlying Indexes”) as of the Index's reconstitution reference date.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Smart Grids Index seeks to track companies that provide next generation products and services related to power, water and transportation infrastructures, or are a necessary component of the supply chain for such products and services. The S&P Kensho Smart Buildings Index seeks to track companies that produce products and services that enable buildings to become more connected, intelligent and adaptive, or are a necessary component of the supply chain for such products and services.To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Kensho New Economies Composite ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Kensho New Economies Composite Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide. The Index is designed to capture companies whose products and services are driving innovation and transforming the global economy through the use of existing and emerging technologies, and rapid developments in robotics, automation, artificial intelligence, connectedness and processing power (“New Economies companies”).In particular, the Index comprises the components included in the New Economy Subsector Indexes (each, an “Underlying Index”) developed by S&P Dow Jones Indices LLC (the “Index Provider”). Each Underlying Index is comprised of securities of New Economies companies in a specific sector. As of July 31, 2026, the Index was comprised of more than 20 Underlying Indexes.The constituents of each Underlying Index are determined by a classification standard produced by the Index Provider. The classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1 filing, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.Underlying Index constituents are then categorized as either “Core” or “Non-Core.” A company is categorized as Core if its products and services related to the Underlying Index's objective are identified in its regulatory filings as principal components of the company's strategy. Products and services are deemed to be principal components of a company's strategy if the company's regulatory filing disclosures regarding such products and services are determined to be sufficiently prominent according to a proprietary algorithm of the Index Provider which calculates prominence based on the frequency and position of such disclosures within regulatory filings. A company may also be categorized as Core if the Index Provider determines that the majority of the company's revenue is derived from products and services related to the Underlying Index's objective as indicated by the company's reported business segments, which is assessed by scanning the S&P Capital IQ Database for annual fiscal year revenue segment reporting. All other companies are categorized as Non-Core, including companies whose products and services are identified as forming a necessary component of the supply chain of the segment targeted by the Underlying Index. Each Underlying Index's exposure is then tilted towards Core Index Constituents.The weight of each security in the Index is based on the relative weight given to each Underlying Index in the Index. The relative weight of each Underlying Index is determined by a proprietary process comparing the ratio of the average daily returns divided by the standard deviation of daily returns among the Underlying Indexes. Underlying Indexes with larger ratios are weighted more heavily than Underlying Indexes with smaller ratios. The weight of each security in each Underlying Index is then multiplied by the relative weight of the respective Underlying Index in the Index to determine the security's initial weight in the Index. The final constituent security weight is subject to liquidity and diversification adjustments.The Index is reconstituted and rebalanced after the close of trading on the third Friday in June with a reference date as of the close of the last trading day in May. In addition, the Index is rebalanced after the close of trading on the third Friday of December with a reference date as of the close of the last trading day in November. In connection with the December rebalance, Index constituents are also evaluated for continued inclusion in the Index if a new eligible regulatory filing has been filed since the last reconstitution review. As of July 31, 2026, the Index comprised 500 securities.The Index Provider is not affiliated with the Fund or the Adviser. The Index Provider establishes and maintains rules which are used to determine the composition of the Index and relative weightings of the securities in the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide. The Index is designed to capture companies whose products and services are driving innovation and transforming the global economy through the use of existing and emerging technologies, and rapid developments in robotics, automation, artificial intelligence, connectedness and processing power (“New Economies companies”).
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	In particular, the Index comprises the components included in the New Economy Subsector Indexes (each, an “Underlying Index”) developed by S&P Dow Jones Indices LLC (the “Index Provider”). Each Underlying Index is comprised of securities of New Economies companies in a specific sector. As of July 31, 2026, the Index was comprised of more than 20 Underlying Indexes.The constituents of each Underlying Index are determined by a classification standard produced by the Index Provider. The classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1 filing, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Kensho Smart Mobility ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Kensho Smart Transportation Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Smart Transportation sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind smart transportation. In particular, the Index comprises the components of the S&P Kensho Autonomous Vehicles Index, the S&P Kensho Advanced Transport Systems Index, the S&P Kensho Electric Vehicles Index and the civilian/commercially focused components of the S&P Kensho Drones Index (the “Underlying Indexes”) as of the Index's reconstitution reference date.The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Autonomous Vehicles Index seeks to track companies that build autonomous and connected vehicles and that provide the products and services that enable these vehicles to become more efficient and intelligent, or are a necessary component of the supply chain for such products and services. The S&P Kensho Advanced Transport Systems Index seeks to track companies that produce products and services that optimize the efficiency of managing large fleets of vehicles, cargo transportation, and mass transit, or are a necessary component of the supply chain for such products and services. The S&P Kensho Electric Vehicles Index seeks to track companies that produce products and services related to the development of electric vehicles, clean fuel systems, and related systems, or are a necessary component of the supply chain for such products and services. The S&P Kensho Drones Index seeks to track companies that produce products and services related to the remotely-operated or unmanned aerial, underwater and surface-level drones market and related subsystems, or are a necessary component of the supply chain for such products and services.To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.Underlying Index constituents are then categorized as either “Core” or “Non-Core.” A company is categorized as Core if its products and services related to the Underlying Index's objective are identified in its regulatory filings as principal components of the company's strategy. Products and services are deemed to be principal components of a company's strategy if the company's regulatory filing disclosures regarding such products and services are determined to be sufficiently prominent according to a proprietary algorithm of the Index Provider which calculates prominence based on the frequency and position of such disclosures within regulatory filings. A company may also be categorized as Core if the Index Provider determines that the majority of the company's revenue is derived from products and services related to the Underlying Index's objective as indicated by the company's reported business segments, which is assessed by scanning the S&P Capital IQ Database for annual fiscal year revenue segment reporting. All other companies are categorized as Non-Core, including companies whose products and services are identified as forming a necessary component of the supply chain of the segment targeted by the Underlying Index. An Index constituent categorized as Core by at least one of the Underlying Indexes will be categorized as Core for purposes of the Index. To tilt the Index's exposure toward Core Index Constituents, at the time of each rebalance the aggregate weighting of Core Index Constituents is based on the proportion of the number of Core Index Constituents, plus an overweight factor of up to 20%. At the time of each rebalance, each Core Index Constituent and Non-Core Index Constituent is equally weighted within the group of Core Index Constituents and Non-Core Index Constituents, respectively, subject to liquidity adjustments.The Index is reconstituted and rebalanced after the close of trading on the third Friday in June with a reference date as of the close of the last trading day in May. In addition, the Index is rebalanced after the close of trading on the third Friday of December with a reference date as of the close of the last trading day in November. In connection with the December rebalance, Index constituents are also evaluated for continued inclusion in the Index if a new eligible regulatory filing has been filed since the last reconstitution review. As of July 31, 2026, the Index comprised 87 securities.The Index Provider is not affiliated with the Fund or the Adviser. The Index Provider establishes and maintains rules which are used to determine the composition of the Index and relative weightings of the securities in the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is comprised of U.S.-listed equity securities (including depositary receipts) of companies domiciled across developed and emerging markets worldwide which are included in the Smart Transportation sector as determined by a classification standard produced by S&P Dow Jones Indices LLC (the “Index Provider”). The Index is designed to capture companies whose products and services are driving innovation behind smart transportation. In particular, the Index comprises the components of the S&P Kensho Autonomous Vehicles Index, the S&P Kensho Advanced Transport Systems Index, the S&P Kensho Electric Vehicles Index and the civilian/commercially focused components of the S&P Kensho Drones Index (the “Underlying Indexes”) as of the Index's reconstitution reference date.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Underlying Indexes are subject to the following liquidity thresholds for each component: (i) must have a share price of at least USD $1.00; (ii) must be issued by a company with a minimum float market capitalization of at least $100 million; and (iii) must have a minimum three-month average daily traded value of at least $1 million. The S&P Kensho Autonomous Vehicles Index seeks to track companies that build autonomous and connected vehicles and that provide the products and services that enable these vehicles to become more efficient and intelligent, or are a necessary component of the supply chain for such products and services. The S&P Kensho Advanced Transport Systems Index seeks to track companies that produce products and services that optimize the efficiency of managing large fleets of vehicles, cargo transportation, and mass transit, or are a necessary component of the supply chain for such products and services. The S&P Kensho Electric Vehicles Index seeks to track companies that produce products and services related to the development of electric vehicles, clean fuel systems, and related systems, or are a necessary component of the supply chain for such products and services. The S&P Kensho Drones Index seeks to track companies that produce products and services related to the remotely-operated or unmanned aerial, underwater and surface-level drones market and related subsystems, or are a necessary component of the supply chain for such products and services.To determine the constituents of the Underlying Indexes, the Index Provider's classification standard utilizes an automated scan of companies' most recent regulatory filings with the U.S. Securities and Exchange Commission on Form 10-K, Form 20-F, Form 40-F, or Form S-1, as applicable, maintained in the S&P Market Intelligence United Document Repository, to identify specific search terms and phrases that describe a company as producing products and services related to the particular segment targeted by the Underlying Index. The resulting list of eligible securities for each Underlying Index is then filtered by eliminating companies that do not include in their regulatory filings a reference to a product or service that (i) is related to a search term or phrase and (ii) is used in a manner that is within the scope of the Underlying Index's objective. Each Underlying Index then screens the remaining securities to remove securities that are not listed on NYSE, NASDAQ, or CBOE exchanges (or an affiliate of one of those exchanges) or do not meet certain minimum liquidity thresholds. The Index Provider's Index Committee then reviews each remaining eligible constituent to verify the rules of the automated scan were implemented correctly.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Metals and Mining ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Metals & Mining Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the metals and mining segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The metals & mining segment of the S&P TMI comprises the following sub-industries: Aluminum, Coal & Consumable Fuels, Copper, Diversified Metals & Mining, Gold, Precious Metals & Minerals, Silver, and Steel.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Aluminum, Coal & Consumable Fuels, Copper, Diversified Metals & Mining, Gold, Precious Metals & Minerals, Silver, and Steel sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 39 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the metals and mining segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The metals & mining segment of the S&P TMI comprises the following sub-industries: Aluminum, Coal & Consumable Fuels, Copper, Diversified Metals & Mining, Gold, Precious Metals & Minerals, Silver, and Steel.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Aluminum, Coal & Consumable Fuels, Copper, Diversified Metals & Mining, Gold, Precious Metals & Minerals, Silver, and Steel sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Oil and Gas Equipment and Services ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Oil & Gas Equipment & Services Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the oil and gas equipment and services segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The oil and gas equipment and services segment of the S&P TMI comprises the Oil & Gas Drilling sub-industry and the Oil & Gas Equipment & Services sub-industry.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Oil & Gas Drilling sub-industry and the Oil & Gas Equipment & Services sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 34 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the oil and gas equipment and services segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The oil and gas equipment and services segment of the S&P TMI comprises the Oil & Gas Drilling sub-industry and the Oil & Gas Equipment & Services sub-industry.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Oil & Gas Drilling sub-industry and the Oil & Gas Equipment & Services sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Oil and Gas Exploration and Production ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Oil & Gas Exploration & Production Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the oil and gas exploration and production segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The oil and gas exploration and production segment of the S&P TMI comprises the following sub-industries: Integrated Oil & Gas, Oil & Gas Exploration & Production, and Oil & Gas Refining & Marketing.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Integrated Oil & Gas, Oil & Gas Exploration & Production, and Oil & Gas Refining & Marketing sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 51 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the oil and gas exploration and production segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The oil and gas exploration and production segment of the S&P TMI comprises the following sub-industries: Integrated Oil & Gas, Oil & Gas Exploration & Production, and Oil & Gas Refining & Marketing.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Integrated Oil & Gas, Oil & Gas Exploration & Production, and Oil & Gas Refining & Marketing sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Pharmaceuticals ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Pharmaceuticals Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the pharmaceuticals segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The pharmaceuticals segment of the S&P TMI comprises the Pharmaceuticals sub-industry.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Pharmaceuticals sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 64 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the pharmaceuticals segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The pharmaceuticals segment of the S&P TMI comprises the Pharmaceuticals sub-industry.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Pharmaceuticals sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Regional Banking ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Regional Banks Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the regional banks segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The regional banks segment of the S&P TMI comprises the Regional Banks sub-industry.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Regional Banks sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 159 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the regional banks segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The regional banks segment of the S&P TMI comprises the Regional Banks sub-industry.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Regional Banks sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Retail ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Retail Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the retail segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The retail segment of the S&P TMI comprises the following sub-industries: Apparel Retail, Automotive Retail, Broadline Retail, Computer & Electronic Retail, Consumer Staples Merchandise Retail, Drug Retail, Food Retailers, and Other Specialty Retail.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Apparel Retail, Automotive Retail, Broadline Retail, Computer & Electronic Retail, Consumer Staples Merchandise Retail, Drug Retail, Food Retailers, and Other Specialty Retail sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 75 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the retail segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The retail segment of the S&P TMI comprises the following sub-industries: Apparel Retail, Automotive Retail, Broadline Retail, Computer & Electronic Retail, Consumer Staples Merchandise Retail, Drug Retail, Food Retailers, and Other Specialty Retail.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Apparel Retail, Automotive Retail, Broadline Retail, Computer & Electronic Retail, Consumer Staples Merchandise Retail, Drug Retail, Food Retailers, and Other Specialty Retail sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Semiconductor ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Semiconductor Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the semiconductors segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The semiconductors segment of the S&P TMI comprises the Semiconductors sub-industry.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Semiconductors sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. If there are fewer than 35 stocks, stocks from the Semiconductor Equipment sub-industry that meet the market capitalization and liquidity thresholds are included in order of their float-adjusted market capitalization from largest to smallest. If there continues to be fewer than 22 stocks, the market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 47 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the semiconductors segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The semiconductors segment of the S&P TMI comprises the Semiconductors sub-industry.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Semiconductors sub-industry that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Software and Services ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Software & Services Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the software and services segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The software and services segment of the S&P TMI comprises the following sub-industries: Application Software, Interactive Home Entertainment, IT Consulting & Other Services, and Systems Software.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Application Software, Interactive Home Entertainment, IT Consulting & Other Services, and Systems Software sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 132 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the software and services segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The software and services segment of the S&P TMI comprises the following sub-industries: Application Software, Interactive Home Entertainment, IT Consulting & Other Services, and Systems Software.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Application Software, Interactive Home Entertainment, IT Consulting & Other Services, and Systems Software sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Telecom ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Telecom Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the telecommunications segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The telecommunications segment of the S&P TMI comprises the following sub-industries: Alternative Carriers, Communications Equipment, Integrated Telecommunication Services, and Wireless Telecommunication Services.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Alternative Carriers, Communications Equipment, Integrated Telecommunication Services, and Wireless Telecommunication Services sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float-adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 40 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the telecommunications segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The telecommunications segment of the S&P TMI comprises the following sub-industries: Alternative Carriers, Communications Equipment, Integrated Telecommunication Services, and Wireless Telecommunication Services.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Alternative Carriers, Communications Equipment, Integrated Telecommunication Services, and Wireless Telecommunication Services sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR SP Transportation ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the S&P Transportation Select Industry Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index represents the transportation segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The transportation segment of the S&P TMI comprises the following sub-industries: Air Freight & Logistics, Airport Services, Cargo Ground Transportation, Highways & Rail Tracks, Marine Transportation, Marine Ports & Services, Passenger Airlines, Passenger Ground Transportation, and Rail Transportation.The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Air Freight & Logistics, Airport Services, Cargo Ground Transportation, Highways & Rail Tracks, Marine Transportation, Marine Ports & Services, Passenger Airlines, Passenger Ground Transportation, and Rail Transportation sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies. To evaluate liquidity, the dollar value traded for initial public offerings or spin-offs that do not have 12 months of trading history is annualized. The market capitalization threshold may be relaxed to ensure that there are at least 22 stocks in the Index as of the rebalancing effective date. Existing Index constituents are removed at the quarterly rebalancing effective date if either their float adjusted market capitalization falls below $300 million or their float-adjusted liquidity ratio falls below 50%. The market capitalization threshold and the liquidity threshold are each reviewed from time to time based on market conditions. The Index is modified equal weighted. The Index rebalances and reconstitutes quarterly on the third Friday of the quarter ending month and a secondary reweighting is performed on the third to last business day of the quarter ending month. The reference date for additions and deletions is after the close of the last trading date of the previous month. The S&P TMI tracks all eligible U.S. common equities listed on the NYSE, NYSE Arca, NYSE American, NASDAQ Global Select Market, NASDAQ Global Market, NASDAQ Capital Market, Cboe BZX, Cboe BYX, Cboe EDGA, or Cboe EDGX exchanges. As of July 31, 2026, the Index comprised 43 stocks.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index represents the transportation segment of the S&P Total Market Index (“S&P TMI”). The S&P TMI is designed to track the broad U.S. equity market. The transportation segment of the S&P TMI comprises the following sub-industries: Air Freight & Logistics, Airport Services, Cargo Ground Transportation, Highways & Rail Tracks, Marine Transportation, Marine Ports & Services, Passenger Airlines, Passenger Ground Transportation, and Rail Transportation.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is one of twenty-one (21) of the S&P Select Industry Indices (the “Select Industry Indices”), each designed to measure the performance of a narrow sub-industry or group of sub-industries determined based on the Global Industry Classification Standard (“GICS”). Membership in the Select Industry Indices is based on the GICS classification, as well as liquidity and market cap requirements. Companies in the Select Industry Indices are classified according to GICS which determines classifications primarily based on revenues; however, earnings and market perception are also considered. The Index consists of the S&P TMI constituents belonging to the Air Freight & Logistics, Airport Services, Cargo Ground Transportation, Highways & Rail Tracks, Marine Transportation, Marine Ports & Services, Passenger Airlines, Passenger Ground Transportation, and Rail Transportation sub-industries that satisfy the following criteria: (i) have a float-adjusted market capitalization greater than or equal to $500 million with a float-adjusted liquidity ratio (defined by dollar value traded over the previous 12 months divided by the float-adjusted market capitalization as of the index rebalancing reference date) greater than or equal to 90% or have a float-adjusted market capitalization greater than or equal to $400 million with a float-adjusted liquidity ratio (as defined above) greater than or equal to 150%; and (ii) are U.S. based companies.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR US Large Cap Low Volatility Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the State Street US Large Cap Low Volatility Index (previously known as the SSGA US Large Cap Low Volatility Index) (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of the stocks of U.S. large capitalization companies that exhibit low volatility. Volatility is a statistical measurement of the magnitude of movements in a stock's price over time.In selecting constituents from the Index Universe (defined herein), the Index utilizes a proprietary rules-based process that seeks to increase exposure to stocks in the Index Universe that exhibit low volatility. The initial universe of securities eligible for inclusion in the Index (the “Index Universe”) is comprised of the largest 1,000 U.S. stocks, based on market capitalization, listed on a U.S. national securities exchange that have trailing six-month average daily trading volumes of at least 250,000 shares and free float factors (percentage of common shares outstanding readily available in the market) greater than 50% as of the Index rebalance determination date. Eligible stocks are assigned to a sector and ranked within each sector according to their volatility. A stock's volatility is measured by the standard deviation of monthly total returns to that stock's price over the trailing 5 years as of the Index rebalance determination date. For stocks with less than 5 years of monthly returns, volatility is measured by available monthly returns if the stock has at least 2.5 years of monthly returns or by the average volatility of stocks in the same sector in the Investment Universe if the stock has fewer than 2.5 years of monthly returns. For each sector, stocks with the lowest volatility whose combined free float sector market capitalization equals 30% are selected for inclusion in the Index, including the first stock that brings the combined sector market capitalization above 30%. The Index weights constituent securities such that securities with the lowest volatility receive the highest weights in the Index, subject to liquidity constraints limiting a constituent's weighting in the Index to 5% and to 20 times the constituent's weight within the Index Universe. The Index rebalance determination date is 10 business days prior to the last business day of March. Index rebalancings are effective after the close of the last business day of March. As of August 31, 2026, a significant portion of the Fund comprised companies in the industrial and real estate sectors, although this may change from time to time. As of July 31, 2026, there were 171 securities in the Index.The Index was created and is sponsored by State Street Investment Management (the “Index Provider”), an affiliate of the Fund and of SSGA FM, the Fund's Adviser. The Index Provider establishes and maintains rules which are used to determine the composition of the Index and relative weightings of the securities in the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of the stocks of U.S. large capitalization companies that exhibit low volatility. Volatility is a statistical measurement of the magnitude of movements in a stock's price over time.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	In selecting constituents from the Index Universe (defined herein), the Index utilizes a proprietary rules-based process that seeks to increase exposure to stocks in the Index Universe that exhibit low volatility. The initial universe of securities eligible for inclusion in the Index (the “Index Universe”) is comprised of the largest 1,000 U.S. stocks, based on market capitalization, listed on a U.S. national securities exchange that have trailing six-month average daily trading volumes of at least 250,000 shares and free float factors (percentage of common shares outstanding readily available in the market) greater than 50% as of the Index rebalance determination date. Eligible stocks are assigned to a sector and ranked within each sector according to their volatility. A stock's volatility is measured by the standard deviation of monthly total returns to that stock's price over the trailing 5 years as of the Index rebalance determination date. For stocks with less than 5 years of monthly returns, volatility is measured by available monthly returns if the stock has at least 2.5 years of monthly returns or by the average volatility of stocks in the same sector in the Investment Universe if the stock has fewer than 2.5 years of monthly returns. For each sector, stocks with the lowest volatility whose combined free float sector market capitalization equals 30% are selected for inclusion in the Index, including the first stock that brings the combined sector market capitalization above 30%. The Index weights constituent securities such that securities with the lowest volatility receive the highest weights in the Index, subject to liquidity constraints limiting a constituent's weighting in the Index to 5% and to 20 times the constituent's weight within the Index Universe.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR US Small Cap Low Volatility Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the State Street US Small Cap Low Volatility Index (previously known as the SSGA US Small Cap Low Volatility Index) (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to measure the performance of the stocks of U.S. small capitalization companies that exhibit low volatility. Volatility is a statistical measurement of the magnitude of movements in a stock's price over time.In selecting constituents from the Index Universe (defined herein), the Index utilizes a proprietary rules-based process that seeks to increase exposure to stocks in the Index Universe that exhibit low volatility. The initial universe of securities eligible for inclusion in the Index (the “Index Universe”) is comprised of the 2,000 U.S. stocks listed on a U.S. national securities exchange whose market capitalizations rank from 1,001 to 3,000 that have trailing six-month average daily trading volumes of at least 250,000 shares and free float factors (percentage of common shares outstanding readily available in the market) greater than 50% as of the Index rebalance determination date. Eligible stocks are assigned to a sector and ranked within each sector according to their volatility. A stock's volatility is measured by the standard deviation of monthly total returns to that stock's price over the trailing 5 years as of the Index rebalance determination date. For stocks with less than 5 years of monthly returns, volatility is measured by available monthly returns if the stock has at least 2.5 years of monthly returns or by the average volatility of stocks in the same sector in the Investment Universe if the stock has fewer than 2.5 years of monthly returns. For each sector, stocks with the lowest volatility whose combined free float sector market capitalization equals 30% are selected for inclusion in the Index, including the first stock that brings the combined sector market capitalization above 30%. The Index weights constituent securities such that securities with the lowest volatility receive the highest weights in the Index, subject to liquidity constraints limiting a constituent's weighting in the Index to 5% and to 20 times the constituent's weight within the Index Universe. The Index rebalance determination date is 10 business days prior to the last business day of March. Index rebalancings are effective after the close of the last business day of March. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial sector, although this may change from time to time. As of July 31, 2026, there were 394 securities in the Index.The Index was created and is sponsored by State Street Investment Management (the “Index Provider”), an affiliate of the Fund and of SSGA FM, the Fund's Adviser. The Index Provider establishes and maintains rules which are used to determine the composition of the Index and relative weightings of the securities in the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of the stocks of U.S. small capitalization companies that exhibit low volatility. Volatility is a statistical measurement of the magnitude of movements in a stock's price over time.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	In selecting constituents from the Index Universe (defined herein), the Index utilizes a proprietary rules-based process that seeks to increase exposure to stocks in the Index Universe that exhibit low volatility. The initial universe of securities eligible for inclusion in the Index (the “Index Universe”) is comprised of the 2,000 U.S. stocks listed on a U.S. national securities exchange whose market capitalizations rank from 1,001 to 3,000 that have trailing six-month average daily trading volumes of at least 250,000 shares and free float factors (percentage of common shares outstanding readily available in the market) greater than 50% as of the Index rebalance determination date. Eligible stocks are assigned to a sector and ranked within each sector according to their volatility. A stock's volatility is measured by the standard deviation of monthly total returns to that stock's price over the trailing 5 years as of the Index rebalance determination date. For stocks with less than 5 years of monthly returns, volatility is measured by available monthly returns if the stock has at least 2.5 years of monthly returns or by the average volatility of stocks in the same sector in the Investment Universe if the stock has fewer than 2.5 years of monthly returns. For each sector, stocks with the lowest volatility whose combined free float sector market capitalization equals 30% are selected for inclusion in the Index, including the first stock that brings the combined sector market capitalization above 30%. The Index weights constituent securities such that securities with the lowest volatility receive the highest weights in the Index, subject to liquidity constraints limiting a constituent's weighting in the Index to 5% and to 20 times the constituent's weight within the Index Universe.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Bloomberg 1-3 Month T-Bill ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg 1-3 Month U.S. Treasury Bill Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. The Index is designed to measure the performance of public obligations of the U.S. Treasury that have a remaining maturity of greater than or equal to 1 month and less than 3 months.The Index includes all publicly issued U.S. Treasury Bills that have a remaining maturity of less than 3 months and at least 1 month, and are rated investment-grade. In addition, the securities must be denominated in U.S. dollars and must have a fixed rate. The Index is market capitalization weighted, with securities held in the Federal Reserve System Open Market Account (the portfolio of U.S. Treasuries, Federal Agency securities, and foreign currency investments held by the U.S. Federal Reserve Bank) deducted from the total amount outstanding. Securities in the Index are updated on the last business day of each month. As of July 31, 2026, there were approximately 17 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of public obligations of the U.S. Treasury that have a remaining maturity of greater than or equal to 1 month and less than 3 months.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes all publicly issued U.S. Treasury Bills that have a remaining maturity of less than 3 months and at least 1 month, and are rated investment-grade. In addition, the securities must be denominated in U.S. dollars and must have a fixed rate.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Bloomberg 3-12 Month T-Bill ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg 3-12 Month U.S. Treasury Bill Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. The Index is designed to measure the performance of public obligations of the U.S. Treasury that have a remaining maturity of greater than or equal to 3 months and less than 12 months.The Index includes all publicly issued U.S. Treasury Bills that have a remaining maturity of less than 12 months and at least 3 months, and are rated investment-grade. In addition, the securities must be denominated in U.S. dollars and must have a fixed rate. The Index is market capitalization weighted, with securities held in the Federal Reserve System Open Market Account deducted from the total amount outstanding. Securities in the Index are reconstituted and rebalanced on the last business day of each month. As of July 31, 2026, there were approximately 23 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of public obligations of the U.S. Treasury that have a remaining maturity of greater than or equal to 3 months and less than 12 months.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes all publicly issued U.S. Treasury Bills that have a remaining maturity of less than 12 months and at least 3 months, and are rated investment-grade. In addition, the securities must be denominated in U.S. dollars and must have a fixed rate.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Bloomberg 1-10 Year TIPS ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg 1-10 Year U.S. Government Inflation-Linked Bond Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. The Index is designed to measure the performance of the inflation protected public obligations of the U.S. Treasury commonly known as “TIPS” that have a remaining maturity greater than or equal to 1 year and less than 10 years. TIPS are securities issued by the U.S. Treasury that are designed to provide inflation protection to investors.The Index includes publicly issued TIPS that have at least 1 year and less than 10 years remaining to maturity on the index rebalancing date, with an issue size equal to or in excess of $500 million. The total amount outstanding for each issue is reflected, there are no adjustments made for sums held in the Federal Reserve System Open Market Account (SOMA) account. Bonds must be capital-indexed and linked to a domestic inflation index. The securities must be issued by the U.S. Government and must be denominated in U.S. dollars and pay coupon and principal in U.S. dollars.New bonds/reopening's entering the Index must settle on or before the index rebalancing date. The Index is rebalanced on the last business day of each month. As of July 31, 2026, the Index comprised 31 securities.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of the inflation protected public obligations of the U.S. Treasury commonly known as “TIPS” that have a remaining maturity greater than or equal to 1 year and less than 10 years. TIPS are securities issued by the U.S. Treasury that are designed to provide inflation protection to investors.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes publicly issued TIPS that have at least 1 year and less than 10 years remaining to maturity on the index rebalancing date, with an issue size equal to or in excess of $500 million. The total amount outstanding for each issue is reflected, there are no adjustments made for sums held in the Federal Reserve System Open Market Account (SOMA) account. Bonds must be capital-indexed and linked to a domestic inflation index. The securities must be issued by the U.S. Government and must be denominated in U.S. dollars and pay coupon and principal in U.S. dollars.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Bloomberg Convertible Securities ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg U.S. Convertible Liquid Bond Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries.The Index is designed to represent the market of U.S. convertible securities, such as convertible bonds and convertible preferred stock. Convertible bonds are bonds that can be exchanged, at the option of the holder or issuer, for a specific number of shares of the issuer's equity securities. Convertible preferred stock is preferred stock that includes an option for the holder to convert to common stock.The Index components are a subset of issues in the Bloomberg Convertible Composite Index. To be included in the Index, a security must meet the following requirements: (i) have an issue amount of at least $350 million and a par amount outstanding of at least $250 million; (ii) be a non-called, non-defaulted security; (iii) have at least 31 days until maturity; (iv) be U.S. dollar denominated; and (v) be a registered or a convertible tranche issued under Rule 144A of the Securities Act of 1933, as amended. The Index may include investment grade, below investment grade and unrated securities. The Index is rebalanced on a monthly basis on the last business day of the month. As of August 31, 2026, a significant portion of the Fund comprised companies in the technology sector, although this may change from time to time. As of July 31, 2026, there were 339 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to represent the market of U.S. convertible securities, such as convertible bonds and convertible preferred stock. Convertible bonds are bonds that can be exchanged, at the option of the holder or issuer, for a specific number of shares of the issuer's equity securities. Convertible preferred stock is preferred stock that includes an option for the holder to convert to common stock.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index components are a subset of issues in the Bloomberg Convertible Composite Index. To be included in the Index, a security must meet the following requirements: (i) have an issue amount of at least $350 million and a par amount outstanding of at least $250 million; (ii) be a non-called, non-defaulted security; (iii) have at least 31 days until maturity; (iv) be U.S. dollar denominated; and (v) be a registered or a convertible tranche issued under Rule 144A of the Securities Act of 1933, as amended.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Bloomberg Emerging Markets USD Bond ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg Emerging Market USD Sovereign and Sovereign Owned Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent the Index concentrates in a particular industry or group of industries. Swaps and futures contracts (each, a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to its Index and in managing cash flows.The Index is designed to measure the performance of fixed and floating-rate US dollar-denominated debt issued by emerging market sovereigns, as well as government guaranteed emerging market issuers and 100% government owned emerging market issuers (i.e., quasi-sovereign emerging market issuers). An emerging market is a country that the World Bank Income group classifies as low/middle income or the International Monetary Fund (IMF) classifies as a non-advanced country.In addition, the Index Provider (defined below) may classify a country as an emerging market based on factors such as investability concerns, the presence of capital controls, and/or geographic considerations. The Index includes bonds of any credit quality with a minimum par amount outstanding of $1 billion, a remaining maturity of at least one year and an original maturity of greater than two and a half years. SEC-registered, Rule 144A and Regulation S bonds are each eligible for inclusion in the Index. As of July 31, 2026, there were approximately 696 securities in the Index.The Index is calculated by the Index Provider (as defined below) using a capped weighting methodology. At each rebalance, each constituent country within the Index is capped at 5% with respect to the total market value of the Index. Any country weight exceeding the 5% limit will be redistributed on a pro rata basis to the bonds of all other countries in the Index that are below the 5% cap. The Index is rebalanced and reconstituted monthly on the last business day of the month.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of fixed and floating-rate US dollar-denominated debt issued by emerging market sovereigns, as well as government guaranteed emerging market issuers and 100% government owned emerging market issuers (i.e., quasi-sovereign emerging market issuers). An emerging market is a country that the World Bank Income group classifies as low/middle income or the International Monetary Fund (IMF) classifies as a non-advanced country.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	In addition, the Index Provider (defined below) may classify a country as an emerging market based on factors such as investability concerns, the presence of capital controls, and/or geographic considerations. The Index includes bonds of any credit quality with a minimum par amount outstanding of $1 billion, a remaining maturity of at least one year and an original maturity of greater than two and a half years. SEC-registered, Rule 144A and Regulation S bonds are each eligible for inclusion in the Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Bloomberg High Yield Bond ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg High Yield Very Liquid Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. The Fund may use derivatives, including credit default swaps and credit default index swaps, to obtain investment exposure that the Adviser expects to correlate closely with the Index, or a portion of the Index, and in managing cash flows.The Index is designed to measure the performance of publicly issued U.S. dollar denominated high yield corporate bonds with above-average liquidity. High yield securities are generally rated below investment-grade and are commonly referred to as “junk bonds.”The Index includes publicly issued U.S. dollar denominated, non-investment-grade, fixed-rate, taxable corporate bonds that have a remaining maturity of at least one year, but not more than fifteen years, regardless of optionality; are rated high-yield (Ba1/BB+/BB+ or below) using the middle rating of Moody's Investors Service, Inc., Fitch Ratings Inc., or S&P Global Ratings, respectively; and have $500 million or more of outstanding face value. To be eligible for inclusion in the Index, a bond must have been issued within the past five years. Exposure to each eligible issuer will be capped at two percent of the Index. In addition, securities must be registered, exempt from registration at the time of issuance or issued under Rule 144A of the Securities Act of 1933, as amended. Original issue zero coupon bonds, step-up coupons that change according to a predetermined schedule, and payment-in-kind (“PIK”) securities and toggle notes paying interest in cash are also eligible. In addition, callable fixed-to-floating rate and fixed-to-variable bonds are eligible during their fixed-rate term only. The Index includes only corporate categories. The corporate categories are Industrial, Utility, and Financial Institutions. Securities excluded from the Index include non-corporate bonds, structured notes, private placements, bonds with equity-type features (e.g., warrants, convertibility), floating-rate issues, Eurobonds, defaulted bonds, partial PIK securities, PIK securities and toggle notes paying interest in-kind, and emerging market bonds. The Index is issuer capped and the securities in the Index are updated on the last business day of each month. As of August 31, 2026, a significant portion of the Fund comprised companies in the consumer cyclical sector, although this may change from time to time. As of July 31, 2026, there were 1,056 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of publicly issued U.S. dollar denominated high yield corporate bonds with above-average liquidity. High yield securities are generally rated below investment-grade and are commonly referred to as “junk bonds.”
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes publicly issued U.S. dollar denominated, non-investment-grade, fixed-rate, taxable corporate bonds that have a remaining maturity of at least one year, but not more than fifteen years, regardless of optionality; are rated high-yield (Ba1/BB+/BB+ or below) using the middle rating of Moody's Investors Service, Inc., Fitch Ratings Inc., or S&P Global Ratings, respectively; and have $500 million or more of outstanding face value. To be eligible for inclusion in the Index, a bond must have been issued within the past five years. Exposure to each eligible issuer will be capped at two percent of the Index. In addition, securities must be registered, exempt from registration at the time of issuance or issued under Rule 144A of the Securities Act of 1933, as amended. Original issue zero coupon bonds, step-up coupons that change according to a predetermined schedule, and payment-in-kind (“PIK”) securities and toggle notes paying interest in cash are also eligible. In addition, callable fixed-to-floating rate and fixed-to-variable bonds are eligible during their fixed-rate term only. The Index includes only corporate categories. The corporate categories are Industrial, Utility, and Financial Institutions. Securities excluded from the Index include non-corporate bonds, structured notes, private placements, bonds with equity-type features (e.g., warrants, convertibility), floating-rate issues, Eurobonds, defaulted bonds, partial PIK securities, PIK securities and toggle notes paying interest in-kind, and emerging market bonds.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Bloomberg Investment Grade Floating Rate ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg U.S. Dollar Floating Rate Note ˂ 5 Years Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries.The Index is designed to measure the performance of U.S. dollar-denominated, investment grade floating rate notes.Securities in the Index must have a remaining maturity of greater than or equal to one month and less than five years, and have $300 million or more of outstanding face value. In addition, securities in the Index must be rated investment grade (Baa3, BBB- or BBB- by Moody's Investors Service (“Moody's”), S&P Global Ratings or Fitch Ratings Inc., respectively). The Index consists of debt instruments that pay a variable coupon rate with a fixed spread. The Index may include U.S. registered, dollar denominated bonds of non-U.S. corporations, governments and supranational entities, as well as securities that are subject to restrictions on resale under the U.S. federal securities laws (“restricted securities”). Excluded from the Index are fixed rate bullet bonds, fixed-rate puttable and fixed-rate callable bonds, fixed rate and fixed to floating capital securities, bonds with equity-linked features (e.g. warrants and convertibles), inflation linked bonds and securitized bonds. The Index is market capitalization weighted and the securities in the Index are updated on the last calendar day of each month. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial and industrial sectors, although this may change from time to time. As of July 31, 2026, there were 550 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of U.S. dollar-denominated, investment grade floating rate notes.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	Securities in the Index must have a remaining maturity of greater than or equal to one month and less than five years, and have $300 million or more of outstanding face value. In addition, securities in the Index must be rated investment grade (Baa3, BBB- or BBB- by Moody's Investors Service (“Moody's”), S&P Global Ratings or Fitch Ratings Inc., respectively). The Index consists of debt instruments that pay a variable coupon rate with a fixed spread. The Index may include U.S. registered, dollar denominated bonds of non-U.S. corporations, governments and supranational entities, as well as securities that are subject to restrictions on resale under the U.S. federal securities laws (“restricted securities”). Excluded from the Index are fixed rate bullet bonds, fixed-rate puttable and fixed-rate callable bonds, fixed rate and fixed to floating capital securities, bonds with equity-linked features (e.g. warrants and convertibles), inflation linked bonds and securitized bonds.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Bloomberg Short Term High Yield Bond ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg US High Yield 350mn Cash Pay 0-5 Yr 2% Capped Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. The Fund may use derivatives, including credit default swaps and credit default index swaps, to obtain investment exposure that the Adviser expects to correlate closely with the Index, or a portion of the Index, and in managing cash flows.The Index is designed to measure the performance of short-term publicly issued U.S. dollar-denominated high yield corporate bonds. High yield securities are generally rated below investment-grade and are commonly referred to as “junk” bonds.The Index includes publicly issued U.S. dollar denominated, non-investment-grade, fixed rate, taxable corporate bonds that have a remaining maturity of less than 5 years regardless of optionality, are rated between Caa3/CCC-/CCC- and Ba1/BB+/BB+ using the middle rating of Moody's Investors Service, Inc., Fitch Ratings Inc., or S&P Global Ratings, respectively, and have at least a $350 million outstanding par value. The Index includes only corporate categories. The corporate categories are Industrial, Utility and Financial Institutions. Securities included in the Index may include securities that are subject to restrictions on resale under the U.S. federal securities laws (“restricted securities”). Excluded from the Index are non-corporate bonds, structured notes with embedded swaps or other special features, bonds with equity-type features (e.g., warrants, convertibility), floating-rate securities and securities that move from fixed to floating-rate, Emerging Market Bonds, defaulted bonds, original issue zero coupon bonds, private placements and payment in kind securities. The Index is issuer-capped and the securities in the Index are updated on the index rebalancing date. The securities in the Index are updated on the last business day of each month. As of August 31, 2026, a significant portion of the Fund comprised companies in the consumer cyclical sector, although this may change from time to time. As of July 31, 2026, there were 1,141 securities in the Index. The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of short-term publicly issued U.S. dollar-denominated high yield corporate bonds. High yield securities are generally rated below investment-grade and are commonly referred to as “junk” bonds.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes publicly issued U.S. dollar denominated, non-investment-grade, fixed rate, taxable corporate bonds that have a remaining maturity of less than 5 years regardless of optionality, are rated between Caa3/CCC-/CCC- and Ba1/BB+/BB+ using the middle rating of Moody's Investors Service, Inc., Fitch Ratings Inc., or S&P Global Ratings, respectively, and have at least a $350 million outstanding par value. The Index includes only corporate categories. The corporate categories are Industrial, Utility and Financial Institutions. Securities included in the Index may include securities that are subject to restrictions on resale under the U.S. federal securities laws (“restricted securities”). Excluded from the Index are non-corporate bonds, structured notes with embedded swaps or other special features, bonds with equity-type features (e.g., warrants, convertibility), floating-rate securities and securities that move from fixed to floating-rate, Emerging Market Bonds, defaulted bonds, original issue zero coupon bonds, private placements and payment in kind securities.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Nuveen ICE High Yield Municipal Bond ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the ICE US Select High Yield Crossover Municipal Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, Nuveen Asset Management, LLC (“Nuveen Asset Management” or the “Sub-Adviser”), the investment sub-adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Sub-Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. Additionally, the Fund intends to invest, under normal circumstances, at least 80% of its net assets, plus the amount of borrowings for investment purposes, in investments the income of which is exempt from Federal income tax. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries.The Index is market capitalization-weighted and designed to measure the performance of lower-rated (A3/A+ or lower) and unrated U.S. dollar-denominated tax-exempt debt publicly issued in the U.S. domestic market by U.S. states, U.S. territories and their political subdivisions. Bonds included in the Index may include private activity bonds, which are typically issued by or on behalf of local or state governments for the purpose of financing the project of a private user.The Index is a blend of the following indices: (i) 70% ICE Core High Yield & Unrated Municipal Index; (ii) 20% ICE 1+ Year BBB AMT-Free Broad National Municipal Index; and (iii) 10% ICE 1+ Year Single-A AMT-Free Broad National Municipal Index. Constituents of the ICE Core High Yield & Unrated Municipal Index must be non-rated or rated below investment grade (Ba1/BB+ or lower) by Moody's Investors Service, Inc. (“Moody's”), Standard & Poor's (“S&P”) and Fitch Ratings Inc. (“Fitch”) (if rated by all three agencies, two of the three ratings must be Ba1/BB+ or lower; if rated by two agencies, the lowest rating must be Ba1/BB+ or lower; and if rated by a single agency, the security must be rated Ba1/BB+ or lower), have at least a $3 million currently outstanding face value, be issued as part of a deal with an original offering size of at least $15 million, and have a remaining term to final maturity of at least one year. Constituents of the ICE 1+ Year BBB AMT-Free Broad National Municipal Index must be rated Baa3, Baa2, or Baa1 by Moody's or BBB-, BBB, or BBB+ by S&P or Fitch (based on the middle rating of the three agencies), have at least a $10 million currently outstanding face value, be issued as part of a deal with an original offering size of at least $100 million, and have a remaining term to final maturity of at least one year. Constituents of the ICE 1+ Year Single-A AMT-Free Broad National Municipal Index must be rated A3, A2, or A1 by Moody's or A-, A, or A+ by S&P or Fitch, (based on the middle rating of the three agencies) have at least a $10 million currently outstanding face value, be issued as part of a deal with an original offering size of at least $100 million, and have a remaining term to final maturity of at least one year. Only fixed-rate coupon bonds (including zero coupon bonds) are eligible for inclusion in the Index. Securities included in the Index may include when-issued securities. Private placements, variable rate demand obligations, securities in legal default, floating rate debt, municipal commercial paper, and debt issued under the municipal liquidity facility are excluded from the Index. The Index is rebalanced and reconstituted on the last calendar day of each month. As of July 31, 2026, there were 16,777 securities in the Index.The Index is sponsored by ICE Data Indices, LLC (the “Index Provider”), which is not affiliated with the Fund, the Adviser or the Sub-Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is market capitalization-weighted and designed to measure the performance of lower-rated (A3/A+ or lower) and unrated U.S. dollar-denominated tax-exempt debt publicly issued in the U.S. domestic market by U.S. states, U.S. territories and their political subdivisions. Bonds included in the Index may include private activity bonds, which are typically issued by or on behalf of local or state governments for the purpose of financing the project of a private user.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is a blend of the following indices: (i) 70% ICE Core High Yield & Unrated Municipal Index; (ii) 20% ICE 1+ Year BBB AMT-Free Broad National Municipal Index; and (iii) 10% ICE 1+ Year Single-A AMT-Free Broad National Municipal Index. Constituents of the ICE Core High Yield & Unrated Municipal Index must be non-rated or rated below investment grade (Ba1/BB+ or lower) by Moody's Investors Service, Inc. (“Moody's”), Standard & Poor's (“S&P”) and Fitch Ratings Inc. (“Fitch”) (if rated by all three agencies, two of the three ratings must be Ba1/BB+ or lower; if rated by two agencies, the lowest rating must be Ba1/BB+ or lower; and if rated by a single agency, the security must be rated Ba1/BB+ or lower), have at least a $3 million currently outstanding face value, be issued as part of a deal with an original offering size of at least $15 million, and have a remaining term to final maturity of at least one year. Constituents of the ICE 1+ Year BBB AMT-Free Broad National Municipal Index must be rated Baa3, Baa2, or Baa1 by Moody's or BBB-, BBB, or BBB+ by S&P or Fitch (based on the middle rating of the three agencies), have at least a $10 million currently outstanding face value, be issued as part of a deal with an original offering size of at least $100 million, and have a remaining term to final maturity of at least one year. Constituents of the ICE 1+ Year Single-A AMT-Free Broad National Municipal Index must be rated A3, A2, or A1 by Moody's or A-, A, or A+ by S&P or Fitch, (based on the middle rating of the three agencies) have at least a $10 million currently outstanding face value, be issued as part of a deal with an original offering size of at least $100 million, and have a remaining term to final maturity of at least one year. Only fixed-rate coupon bonds (including zero coupon bonds) are eligible for inclusion in the Index. Securities included in the Index may include when-issued securities. Private placements, variable rate demand obligations, securities in legal default, floating rate debt, municipal commercial paper, and debt issued under the municipal liquidity facility are excluded from the Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Nuveen ICE Municipal Bond ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the ICE 1+ Year AMT-Free Broad Municipal Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, Nuveen Asset Management, LLC (“Nuveen Asset Management” or the “Sub-Adviser”), the investment sub-adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Sub-Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. Additionally, the Fund intends to invest, under normal circumstances, at least 80% of its net assets, plus the amount of borrowings for investment purposes, in investments the income of which is exempt from Federal income tax. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries.The Index is designed to track the performance of U.S. dollar denominated investment grade tax-exempt debt publicly issued by U.S. states and territories, and their political subdivisions, in the U.S. domestic market. The Index includes state and local general obligation bonds, revenue bonds, pre-refunded bonds, and insured bonds. A general obligation bond is secured by the full faith and credit of its issuer. A revenue bond is payable from a specific source of revenue. A pre-refunded bond is a revenue bond that the issuer has allocated funds to fully retire. An insured bond is protected from issuer default or rating downgrade by an insurance company. The Index also includes municipal lease obligations, which are securities issued by state and local governments and authorities to finance the acquisition of equipment and facilities. They may take the form of a lease, an installment purchase contract, a conditional sales contract, or a participation interest in a lease or contract.The Index is a rules-based, market-capitalization weighted index engineered for the tax-exempt bond market. All bonds in the Index must be exempt from federal taxes, U.S. dollar denominated and have an average rating of Baa3/BBB- or higher by the following statistical ratings agencies: Moody's Investors Service, Inc., S&P Global Ratings, and Fitch Ratings Inc. In addition, to be included in the Index, a security must (i) not be subject to alternative minimum tax; (ii) have a fixed coupon schedule; (iii) have at least one year remaining term to final maturity; (iv) have at least 18 months to final maturity at the time of issuance; and (v) meet the following minimum size requirements: (a) have a minimum current amount outstanding of $5 million for bonds with an initial term to final maturity of less than 3 years; (b) have a minimum current amount outstanding of $7 million for bonds with an initial term to final maturity of 3 to 15 years; and (c) have a minimum current amount outstanding of $10 million for bonds with an initial term to final maturity of 15 or more years. Securities included in the Index may include when-issued securities and zero-coupon bonds. Secondarily insured bonds, Rule 144A bonds, bonds issued under the municipal liquidity facility or a municipal commercial paper program are excluded from the Index. The Index is rebalanced and reconstituted monthly on the last calendar day of the month. As of July 31, 2026, there were 64,007 securities in the Index.The Index is sponsored by ICE Data Indices, LLC (the “Index Provider”), which is not affiliated with the Fund, the Adviser or the Sub-Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to track the performance of U.S. dollar denominated investment grade tax-exempt debt publicly issued by U.S. states and territories, and their political subdivisions, in the U.S. domestic market. The Index includes state and local general obligation bonds, revenue bonds, pre-refunded bonds, and insured bonds. A general obligation bond is secured by the full faith and credit of its issuer. A revenue bond is payable from a specific source of revenue. A pre-refunded bond is a revenue bond that the issuer has allocated funds to fully retire. An insured bond is protected from issuer default or rating downgrade by an insurance company. The Index also includes municipal lease obligations, which are securities issued by state and local governments and authorities to finance the acquisition of equipment and facilities. They may take the form of a lease, an installment purchase contract, a conditional sales contract, or a participation interest in a lease or contract.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is a rules-based, market-capitalization weighted index engineered for the tax-exempt bond market. All bonds in the Index must be exempt from federal taxes, U.S. dollar denominated and have an average rating of Baa3/BBB- or higher by the following statistical ratings agencies: Moody's Investors Service, Inc., S&P Global Ratings, and Fitch Ratings Inc. In addition, to be included in the Index, a security must (i) not be subject to alternative minimum tax; (ii) have a fixed coupon schedule; (iii) have at least one year remaining term to final maturity; (iv) have at least 18 months to final maturity at the time of issuance; and (v) meet the following minimum size requirements: (a) have a minimum current amount outstanding of $5 million for bonds with an initial term to final maturity of less than 3 years; (b) have a minimum current amount outstanding of $7 million for bonds with an initial term to final maturity of 3 to 15 years; and (c) have a minimum current amount outstanding of $10 million for bonds with an initial term to final maturity of 15 or more years. Securities included in the Index may include when-issued securities and zero-coupon bonds. Secondarily insured bonds, Rule 144A bonds, bonds issued under the municipal liquidity facility or a municipal commercial paper program are excluded from the Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Nuveen ICE Short Term Municipal Bond ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the ICE 1-5 Year AMT-Free Broad Municipal Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, Nuveen Asset Management, LLC (“Nuveen Asset Management” or the “Sub-Adviser”), the investment sub-adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Sub-Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. Additionally, the Fund intends to invest, under normal circumstances, at least 80% of its net assets, plus the amount of borrowings for investment purposes, in investments the income of which is exempt from Federal income tax. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries.The Index is designed to track the performance of U.S. dollar denominated investment grade, short-term tax-exempt debt publicly issued by U.S. states and territories, and their political subdivisions, in the U.S. domestic market. The Index includes state and local general obligation bonds, revenue bonds, pre-refunded bonds, and insured bonds. A general obligation bond is secured by the full faith and credit of its issuer. A revenue bond is payable from a specific source of revenue. A pre-refunded bond is a revenue bond that the issuer has allocated funds to fully retire. An insured bond is protected from issuer default or rating downgrade by an insurance company. The Index also includes municipal lease obligations, which are securities issued by state and local governments and authorities to finance the acquisition of equipment and facilities. They may take the form of a lease, an installment purchase contract, a conditional sales contract, or a participation interest in a lease or contract.The Index is a rules-based, market-capitalization weighted index engineered for the tax-exempt bond market. All bonds in the Index must be exempt from federal taxes, U.S. dollar denominated and have an average rating of Baa3/BBB- or higher by the following statistical ratings agencies: Moody's Investors Service, Inc., S&P Global Ratings and Fitch Ratings Inc. In addition, to be included in the Index, a security must (i) not be subject to alternative minimum tax; (ii) have a fixed coupon schedule; (iii) have a remaining term to final maturity between 1 and 5 years; (iv) have at least 18 months to final maturity at the time of issuance; and (v) meet the following minimum size requirements: (a) have a minimum current amount outstanding of $5 million for bonds with an initial term to final maturity of less than 3 years; (b) have a minimum current amount outstanding of $7 million for bonds with an initial term to final maturity of 3 to 15 years; and (c) have a minimum current amount outstanding of $10 million for bonds with an initial term to final maturity of 15 or more years. Securities included in the Index may include when-issued securities and zero-coupon bonds. Secondarily insured bonds, Rule 144A bonds, bonds issued under the municipal liquidity facility or a municipal commercial paper program are excluded from the Index. The Index is rebalanced and reconstituted monthly on the last calendar day of the month. As of July 31, 2026, there were 15,054 securities in the Index. The Index is sponsored by ICE Data Indices, LLC (the “Index Provider”), which is not affiliated with the Fund, the Adviser or the Sub-Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to track the performance of U.S. dollar denominated investment grade, short-term tax-exempt debt publicly issued by U.S. states and territories, and their political subdivisions, in the U.S. domestic market. The Index includes state and local general obligation bonds, revenue bonds, pre-refunded bonds, and insured bonds. A general obligation bond is secured by the full faith and credit of its issuer. A revenue bond is payable from a specific source of revenue. A pre-refunded bond is a revenue bond that the issuer has allocated funds to fully retire. An insured bond is protected from issuer default or rating downgrade by an insurance company. The Index also includes municipal lease obligations, which are securities issued by state and local governments and authorities to finance the acquisition of equipment and facilities. They may take the form of a lease, an installment purchase contract, a conditional sales contract, or a participation interest in a lease or contract.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is a rules-based, market-capitalization weighted index engineered for the tax-exempt bond market. All bonds in the Index must be exempt from federal taxes, U.S. dollar denominated and have an average rating of Baa3/BBB- or higher by the following statistical ratings agencies: Moody's Investors Service, Inc., S&P Global Ratings and Fitch Ratings Inc. In addition, to be included in the Index, a security must (i) not be subject to alternative minimum tax; (ii) have a fixed coupon schedule; (iii) have a remaining term to final maturity between 1 and 5 years; (iv) have at least 18 months to final maturity at the time of issuance; and (v) meet the following minimum size requirements: (a) have a minimum current amount outstanding of $5 million for bonds with an initial term to final maturity of less than 3 years; (b) have a minimum current amount outstanding of $7 million for bonds with an initial term to final maturity of 3 to 15 years; and (c) have a minimum current amount outstanding of $10 million for bonds with an initial term to final maturity of 15 or more years. Securities included in the Index may include when-issued securities and zero-coupon bonds. Secondarily insured bonds, Rule 144A bonds, bonds issued under the municipal liquidity facility or a municipal commercial paper program are excluded from the Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio Aggregate Bond Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg U.S. Aggregate Bond Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. TBA Transactions (as defined below) are included within the above-noted investment policy. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. The Fund may use derivatives, including credit default swaps and credit default index swaps, to obtain investment exposure that the Adviser expects to correlate closely with the Index, or a portion of the Index, and in managing cash flows.The Index is designed to measure the performance of the U.S. dollar denominated investment grade bond market, which includes investment grade (must be Baa3/BBB- or higher using the middle rating of Moody's Investors Service, Inc., S&P Global Ratings, and Fitch Ratings Inc.) government bonds, investment grade corporate bonds, mortgage pass-through securities, commercial mortgage backed securities and other asset backed securities that are publicly for sale in the United States.The securities in the Index must have at least 1 year remaining to maturity and must have $300 million or more of outstanding face value. Asset backed securities must have a minimum deal size of $500 million and a minimum tranche size of $25 million. For commercial mortgage backed securities, the original aggregate transaction must have a minimum deal size of $500 million, and a minimum tranche size of $25 million; the aggregate outstanding transaction sizes must be at least $300 million to remain in the Index. In addition, the securities must be U.S. dollar denominated, fixed rate, non-convertible, and taxable. Certain types of securities, such as flower bonds, targeted investor notes, and state and local government series bonds are excluded from the Index. Also excluded from the Index are structured notes with embedded swaps or other special features, private placements, floating rate securities and Eurobonds. The Index is market capitalization weighted and the securities in the Index are updated on the last business day of each month. As of July 31, 2026, there were 14,173 securities in the Index.As of July 31, 2026, approximately 29% of the bonds represented in the Index were U.S. agency mortgage pass-through securities. U.S. agency mortgage pass-through securities are securities issued by entities such as Government National Mortgage Association (“GNMA”) and Federal National Mortgage Association (“FNMA”) that are backed by pools of mortgages. Transactions in mortgage pass-through securities may occur through standardized contracts for future delivery in which the exact mortgage pools to be delivered are not specified until a few days prior to settlement, referred to as a “to-be-announced transaction” or “TBA Transaction.” In a TBA Transaction, the buyer and seller agree upon general trade parameters such as agency, settlement date, par amount and price. The actual pools delivered generally are determined two days prior to the settlement date; however, it is not anticipated that the Fund will receive pools, but instead will participate in rolling TBA Transactions. The Fund expects to enter into such contracts on a regular basis. The Fund, pending settlement of such contracts, will invest its assets in high-quality, liquid short term instruments, including shares of affiliated money market funds.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of the U.S. dollar denominated investment grade bond market, which includes investment grade (must be Baa3/BBB- or higher using the middle rating of Moody's Investors Service, Inc., S&P Global Ratings, and Fitch Ratings Inc.) government bonds, investment grade corporate bonds, mortgage pass-through securities, commercial mortgage backed securities and other asset backed securities that are publicly for sale in the United States.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The securities in the Index must have at least 1 year remaining to maturity and must have $300 million or more of outstanding face value. Asset backed securities must have a minimum deal size of $500 million and a minimum tranche size of $25 million. For commercial mortgage backed securities, the original aggregate transaction must have a minimum deal size of $500 million, and a minimum tranche size of $25 million; the aggregate outstanding transaction sizes must be at least $300 million to remain in the Index. In addition, the securities must be U.S. dollar denominated, fixed rate, non-convertible, and taxable. Certain types of securities, such as flower bonds, targeted investor notes, and state and local government series bonds are excluded from the Index. Also excluded from the Index are structured notes with embedded swaps or other special features, private placements, floating rate securities and Eurobonds.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. TBA Transactions (as defined below) are included within the above-noted investment policy.
State Street SPDR Portfolio Corporate Bond Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg U.S. Corporate Bond Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. The Fund may use derivatives, including credit default swaps and credit default index swaps, to obtain investment exposure that the Adviser expects to correlate closely with the Index, or a portion of the Index, and in managing cash flows.The Index is designed to measure the performance of the investment grade corporate bond market.The Index includes publicly issued, investment grade, fixed-rate, taxable, U.S. dollar-denominated corporate bonds issued by U.S. and non-U.S. industrial, utility, and financial institutions. Bonds included in the Index must have $300 million or more of par amount outstanding and a remaining maturity of at least 1 year. The Index considers investment grade securities to be rated Baa3/BBB- or higher, using the middle rating of Moody's Investors Service, Inc., Fitch Ratings Inc., or S&P Global Ratings. If only two of the three agencies rate the security, then the more conservative (lower) rating will be used to determine Index eligibility. If only one of the agencies rates the security, then that rating will be used. SEC-registered securities, bonds exempt from registration at the time of issuance and SEC Rule 144A securities with registration rights are eligible for inclusion. The Index is rebalanced monthly on the last business day of the month. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial and industrial sectors, although this may change from time to time. As of July 31, 2026, there were 8,779 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of the investment grade corporate bond market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes publicly issued, investment grade, fixed-rate, taxable, U.S. dollar-denominated corporate bonds issued by U.S. and non-U.S. industrial, utility, and financial institutions. Bonds included in the Index must have $300 million or more of par amount outstanding and a remaining maturity of at least 1 year. The Index considers investment grade securities to be rated Baa3/BBB- or higher, using the middle rating of Moody's Investors Service, Inc., Fitch Ratings Inc., or S&P Global Ratings. If only two of the three agencies rate the security, then the more conservative (lower) rating will be used to determine Index eligibility. If only one of the agencies rates the security, then that rating will be used. SEC-registered securities, bonds exempt from registration at the time of issuance and SEC Rule 144A securities with registration rights are eligible for inclusion.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio High Yield Bond Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the ICE BofA US High Yield Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. The Fund may use derivatives, including credit default swaps and credit default index swaps, to obtain investment exposure that the Adviser expects to correlate closely with the Index, or a portion of the Index, and in managing cash flows.The Index is designed to measure the performance of U.S. dollar denominated below investment grade (commonly referred to as “junk”) corporate debt publicly issued in the U.S. domestic market.The Index includes securities rated below investment grade (based on an average of Moody's Investors Service, Inc., Fitch Ratings Inc., and S&P Global Ratings) with at least 18 months remaining to final maturity at the time of issuance and at least one year remaining term to final maturity as of the Index's rebalancing date. In addition, individual securities of qualifying issuers must have a fixed coupon schedule and a minimum amount outstanding of $250 million. Qualifying corporate issuers must have risk exposure to an FX-G10 or Western European country, or a territory of the United States or a Western European country. As of July 31, 2026, the FX-G10 includes all Eurozone members, the United States, Japan, the United Kingdom, Canada, Australia, New Zealand, Switzerland, Norway and Sweden. Securities included in the Index may include securities that are subject to restrictions on resale under the U.S. federal securities laws (“restricted securities”).The Index is market capitalization weighted, and is rebalanced on the last calendar day of the month based on information available up to and including the third business day before the last business day of the month. As of August 31, 2026, a significant portion of the Fund comprised companies in the consumer cyclical sector, although this may change from time to time. As of July 31, 2026, there were approximately 1,890 securities in the Index.The Index is sponsored by ICE Data Indices, LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of U.S. dollar denominated below investment grade (commonly referred to as “junk”) corporate debt publicly issued in the U.S. domestic market.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes securities rated below investment grade (based on an average of Moody's Investors Service, Inc., Fitch Ratings Inc., and S&P Global Ratings) with at least 18 months remaining to final maturity at the time of issuance and at least one year remaining term to final maturity as of the Index's rebalancing date. In addition, individual securities of qualifying issuers must have a fixed coupon schedule and a minimum amount outstanding of $250 million. Qualifying corporate issuers must have risk exposure to an FX-G10 or Western European country, or a territory of the United States or a Western European country. As of July 31, 2026, the FX-G10 includes all Eurozone members, the United States, Japan, the United Kingdom, Canada, Australia, New Zealand, Switzerland, Norway and Sweden. Securities included in the Index may include securities that are subject to restrictions on resale under the U.S. federal securities laws (“restricted securities”).
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio Intermediate Term Corporate Bond Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg U.S. Intermediate Corporate Bond Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. The Fund may use derivatives, including credit default swaps and credit default index swaps, to obtain investment exposure that the Adviser expects to correlate closely with the Index, or a portion of the Index, and in managing cash flows.The Index is designed to measure the performance of U.S. corporate bonds that have a maturity of greater than or equal to 1 year and less than 10 years.The Index is a component of the Bloomberg U.S. Corporate Index and includes investment grade, fixed-rate, taxable, U.S. dollar denominated debt with $300 million or more of par amount outstanding, issued by U.S. and non-U.S. industrial, utility, and financial institutions. Subordinated issues, securities with normal call and put provisions and sinking funds, medium-term notes (if they are publicly underwritten), 144A securities with registration rights, and global issues that are SEC-registered are included. Structured notes with embedded swaps or other special features, as well as private placements, floating- rate securities, and Eurobonds are excluded from the Index. The Index is rebalanced monthly, on the last business day of the month. As of August 31, 2026, a significant portion of the Fund comprised companies in the financial and industrial sectors, although this may change from time to time. As of July 31, 2026, there were 5,646 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of U.S. corporate bonds that have a maturity of greater than or equal to 1 year and less than 10 years.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is a component of the Bloomberg U.S. Corporate Index and includes investment grade, fixed-rate, taxable, U.S. dollar denominated debt with $300 million or more of par amount outstanding, issued by U.S. and non-U.S. industrial, utility, and financial institutions. Subordinated issues, securities with normal call and put provisions and sinking funds, medium-term notes (if they are publicly underwritten), 144A securities with registration rights, and global issues that are SEC-registered are included. Structured notes with embedded swaps or other special features, as well as private placements, floating- rate securities, and Eurobonds are excluded from the Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio Intermediate Term Treasury Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg 3-10 Year U.S. Treasury Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. The Index is designed to measure the performance of intermediate term (3-10 years) public obligations of the U.S. Treasury.The Index includes all publicly issued U.S. Treasury securities that have a remaining maturity of greater than or equal to 3 years and less than 10 years, are rated investment grade and have $300 million or more of outstanding face value. In addition, the securities must be denominated in U.S. dollars, fixed rate and non-convertible. Securities excluded from the Index include state and local government series bonds, inflation protected public obligations of the U.S. Treasury, commonly known as “TIPS,” floating rate bonds and coupon issues that have been stripped from bonds included in the Index. The Index is market capitalization weighted and the securities in the Index are updated on the last business day of each month. As of July 31, 2026, there were 103 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of intermediate term (3-10 years) public obligations of the U.S. Treasury.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes all publicly issued U.S. Treasury securities that have a remaining maturity of greater than or equal to 3 years and less than 10 years, are rated investment grade and have $300 million or more of outstanding face value. In addition, the securities must be denominated in U.S. dollars, fixed rate and non-convertible. Securities excluded from the Index include state and local government series bonds, inflation protected public obligations of the U.S. Treasury, commonly known as “TIPS,” floating rate bonds and coupon issues that have been stripped from bonds included in the Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio Long Term Corporate Bond Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg U.S. Long Term Corporate Bond Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries.The Index is designed to measure the performance of U.S. corporate bonds that have a maturity of greater than or equal to 10 years.The Index is a component of the Bloomberg U.S. Corporate Index and includes investment grade, fixed-rate, taxable, U.S. dollar-denominated debt with $300 million or more of par amount outstanding, issued by U.S. and non-U.S. industrial, utility, and financial institutions. Subordinated issues, securities with normal call and put provisions and sinking funds, medium-term notes (if they are publicly underwritten), 144A securities with registration rights, and global issues that are SEC-registered are included. Structured notes with embedded swaps or other special features, as well as private placements, floating-rate securities, and Eurobonds are excluded from the Index. The Index is rebalanced monthly, on the last business day of the month. As of August 31, 2026, a significant portion of the Fund comprised companies in the industrial and financial sectors, although this may change from time to time. As of July 31, 2026, there were 3,133 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of U.S. corporate bonds that have a maturity of greater than or equal to 10 years.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index is a component of the Bloomberg U.S. Corporate Index and includes investment grade, fixed-rate, taxable, U.S. dollar-denominated debt with $300 million or more of par amount outstanding, issued by U.S. and non-U.S. industrial, utility, and financial institutions. Subordinated issues, securities with normal call and put provisions and sinking funds, medium-term notes (if they are publicly underwritten), 144A securities with registration rights, and global issues that are SEC-registered are included. Structured notes with embedded swaps or other special features, as well as private placements, floating-rate securities, and Eurobonds are excluded from the Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio Long Term Treasury Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>
Strategy Narrative [Text Block]	In seeking to track the performance of the Bloomberg Long U.S. Treasury Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in weightings of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in debt securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. The Index is designed to measure the performance of public obligations of the U.S. Treasury that have a remaining maturity of 10 years or more.The Index includes all publicly issued, U.S. Treasury securities that have a remaining maturity of 10 years or more, are rated investment grade, and have $300 million or more of outstanding face value. In addition, the securities must be denominated in U.S. dollars and must be fixed rate and non-convertible. Excluded from the Index are certain special issues, such as flower bonds, targeted investor notes, state and local government series bonds, inflation protected public obligations of the U.S. Treasury, commonly known as “TIPS,” and coupon issues that have been stripped from bonds included in the Index. The Index is market capitalization weighted and the securities in the Index are updated on the last business day of each month. As of July 31, 2026, there were 99 securities in the Index.The Index is sponsored by Bloomberg Index Services Limited (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]	The Index is designed to measure the performance of public obligations of the U.S. Treasury that have a remaining maturity of 10 years or more.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]	The Index includes all publicly issued, U.S. Treasury securities that have a remaining maturity of 10 years or more, are rated investment grade, and have $300 million or more of outstanding face value. In addition, the securities must be denominated in U.S. dollars and must be fixed rate and non-convertible. Excluded from the Index are certain special issues, such as flower bonds, targeted investor notes, state and local government series bonds, inflation protected public obligations of the U.S. Treasury, commonly known as “TIPS,” and coupon issues that have been stripped from bonds included in the Index.
Rule 35d-1 Eighty Percent Investment Policy [Text Block]	Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.
State Street SPDR Portfolio Mortgage Backed Bond Index ETF
Prospectus [Line Items]
Strategy [Heading]	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">The Fund's Principal Investment Strategy</span>

Investment Strategy

Jun. 30, 2026

The Fund's Principal Investment Strategy

In seeking to track the performance of the Dow Jones U.S. Select REIT Capped Index (the “Index”), the Fund employs a sampling strategy, which means that the Fund is not required to purchase all of the securities represented in the Index. Instead, the Fund may purchase a subset of the securities in the Index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the Index. The quantity of holdings in the Fund will be based on a number of factors, including asset size of the Fund. Based on its analysis of these factors, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the investment adviser to the Fund, either may invest the Fund's assets in a subset of securities in the Index or may invest the Fund's assets in substantially all of the securities represented in the Index in approximately the same proportions as the Index, as determined by the Adviser to be in the best interest of the Fund in pursuing its objective.Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice. In addition, in seeking to track the Index, the Fund may invest in equity securities that are not included in the Index. The Fund may also invest in cash and cash equivalents or money market instruments (including money market funds advised by the Adviser) for cash management purposes. In seeking to track the Index, the Fund's assets may be concentrated in an industry or group of industries, but only to the extent that the Index concentrates in a particular industry or group of industries. Futures contracts (a type of derivative instrument) may be used by the Fund in seeking performance that corresponds to the Index and in managing cash flows.The Index is designed to provide a measure of real estate securities that serve as proxies for direct real estate investing, in part by excluding securities whose value is not always closely tied to the value of the underlying real estate. The reason for the exclusions is that performance of such securities may be driven by factors other than the value of real estate. The Index is a market capitalization weighted index of publicly traded real estate investment trusts (“REITs”) and is comprised of companies whose charters are the equity ownership and operation of commercial and/or residential real estate and which operate under the REIT Act of 1960.To be included in the Index, a company must be both an equity owner and operator of commercial and/or residential real estate. Businesses excluded from the Index include: those classified under the Dow Jones REIT/RESI Industry Classification Hierarchy and/or Global Industry Classification Standard (GICS) as “Specialty” (i.e., REIT types that cannot be easily classified within the Hierarchy, including timber REITs, railroad REITs and tower REITs), hybrid REITS, mortgage REITs, real estate finance companies, mortgage brokers and bankers, commercial and residential real estate brokers and estate agents, home builders, large landowners and subdividers of unimproved land, as well as companies that have more than 25% of their assets in direct mortgage investments. A company must have a minimum float-adjusted market capitalization of at least $200 million at the time of its inclusion, and at least 75% of the company's total revenue must be derived from the ownership and operation of real estate assets. A stock must have a median daily value traded of at least $5 million for the three-months prior to the rebalancing reference date. The Index is generally rebalanced quarterly, and returns are calculated on a buy and hold basis except as necessary to reflect the occasional occurrence of Index changes in the middle of the month. Each REIT in the Index is weighted by its float-adjusted market capitalization (i.e., each security is weighted to reflect the attainable market capitalization of the security which reflects that portion of securities shares that are accessible to investors), subject to the following constraints applied at each rebalancing: (i) no single company's weight can exceed 10%, and (ii) the aggregate weight of all companies weighing above 4.5% cannot exceed 22.5%. In addition, each company's weight in the Index is reviewed daily and when the sum of companies with a weight greater than 5% exceeds 25%, additional capping is performed, effective after the close of business on the next trading day. The Index is priced daily and is a total return (price and income) benchmark. As of July 31, 2026, the Index comprised 97 REITs.The Index is sponsored by S&P Dow Jones Indices LLC (the “Index Provider”), which is not affiliated with the Fund or the Adviser. The Index Provider determines the composition of the Index, relative weightings of the securities in the Index and publishes information regarding the market value of the Index.

Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block]

The Index is designed to provide a measure of real estate securities that serve as proxies for direct real estate investing, in part by excluding securities whose value is not always closely tied to the value of the underlying real estate. The reason for the exclusions is that performance of such securities may be driven by factors other than the value of real estate. The Index is a market capitalization weighted index of publicly traded real estate investment trusts (“REITs”) and is comprised of companies whose charters are the equity ownership and operation of commercial and/or residential real estate and which operate under the REIT Act of 1960.

Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block]

To be included in the Index, a company must be both an equity owner and operator of commercial and/or residential real estate. Businesses excluded from the Index include: those classified under the Dow Jones REIT/RESI Industry Classification Hierarchy and/or Global Industry Classification Standard (GICS) as “Specialty” (i.e., REIT types that cannot be easily classified within the Hierarchy, including timber REITs, railroad REITs and tower REITs), hybrid REITS, mortgage REITs, real estate finance companies, mortgage brokers and bankers, commercial and residential real estate brokers and estate agents, home builders, large landowners and subdividers of unimproved land, as well as companies that have more than 25% of their assets in direct mortgage investments. A company must have a minimum float-adjusted market capitalization of at least $200 million at the time of its inclusion, and at least 75% of the company's total revenue must be derived from the ownership and operation of real estate assets. A stock must have a median daily value traded of at least $5 million for the three-months prior to the rebalancing reference date.

Rule 35d-1 Eighty Percent Investment Policy [Text Block]

Under normal market conditions, the Fund will invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in the securities comprising the index it seeks to track. Prior to any change in this 80% investment policy, the Fund will provide shareholders with 60 days' notice.