Investment Risks |
Dec. 31, 2025 |
|---|---|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. |
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Risk Not Insured Depository Institution [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The value of investments held by the Fund may increase or decrease in response to social, economic, political, financial, public health crises or other disruptive events (whether real, expected or perceived) in the U.S. and global markets and include events such as war, natural disasters, epidemics and pandemics, terrorism, conflicts and social unrest. These events may negatively impact broad segments of businesses and populations and may exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted. Certain securities and other investments held by the Fund may experience increased volatility, illiquidity, or other potentially adverse effects in reaction to changing market conditions. Monetary and/or fiscal actions taken by U.S. or foreign governments to stimulate or stabilize the global economy may not be effective and could lead to high market volatility.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Equity Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Securities Risk. The value of equity securities and related instruments may decline in response to adverse changes in the economy or the economic outlook; deterioration in investor sentiment; interest rate, currency, and commodity price fluctuations; adverse geopolitical, social or environmental developments; issuer and sector-specific considerations; unexpected trading activity among retail investors; or other factors. Market conditions may affect certain types of stocks to a greater extent than other types of stocks. If the stock market declines in value, the value of the Fund’s equity securities will also likely decline. Although prices can rebound, there is no assurance that values will return to previous levels.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Growth Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Growth Risk. Because the Fund normally invests primarily in stocks of growth companies, it is subject to the risk of underperforming the overall stock market during periods in which stocks of such companies are out of favor and generate lower returns than the market as a whole.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Tax-Managed Investing Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tax-Managed Investing Risk. Market conditions may limit the Fund’s ability to generate tax losses or to generate dividend income taxed at favorable tax rates. The Fund’s tax-managed strategy may cause the Fund to hold a security in order to achieve more favorable tax-treatment or to sell a security in order to create tax losses. The Fund’s ability to utilize various tax-management techniques may be curtailed or eliminated by tax legislation, regulation or interpretations. Although the Fund expects that a smaller portion of its total return will consist of taxable distributions to shareholders as compared to equity mutual funds that are managed without regard to tax considerations, there can be no assurance about the size of taxable distributions to shareholders.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Foreign Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Investment Risk. Foreign investments can be adversely affected by political, economic and market developments abroad, including the imposition of economic and other sanctions by the United States or another country against a particular country or countries, organizations, entities and/or individuals. There may be less publicly available information about foreign issuers because they may not be subject to reporting practices, requirements or regulations comparable to those to which United States companies are subject. Adverse changes in investment regulations, capital requirements or exchange controls could adversely affect the value of the Fund’s investments. Foreign markets may be smaller, less liquid and more volatile than the major markets in the United States and, as a result, Fund share values may be more volatile. Trading in foreign markets typically involves higher expense than trading in the United States. The Fund may have difficulties enforcing its legal or contractual rights in a foreign country. Depositary receipts are subject to many of the risks associated with investing directly in foreign instruments, including the political and economic risks of the underlying issuer’s country and, in the case of depositary receipts traded on foreign markets, currency risk.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Emerging Markets Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Emerging Markets Investment Risk. Investment markets within emerging market countries are typically smaller, less liquid, less developed and more volatile than those in more developed markets like the United States, and may be focused in certain sectors. Emerging market securities often involve greater risks than developed market securities. The information available about an emerging market issuer may be less reliable than for comparable issuers in more developed capital markets.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Currency Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Currency Risk. Exchange rates for currencies fluctuate daily. The value of foreign investments may be affected favorably or unfavorably by changes in currency exchange rates in relation to the U.S. dollar. Currency markets generally are not as regulated as securities markets and currency transactions are subject to settlement, custodial and other operational risks.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | ETF Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | ETF Risk. ETFs are subject to the risks of investing in the underlying securities or other investments. ETF shares may trade at a premium or discount to net asset value and are subject to secondary market trading risks. In addition, the Fund will bear a pro rata portion of the operating expenses of an ETF in which it invests.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Real Estate Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Real Estate Risk. Real estate investments are subject to risks associated with owning real estate, including declines in real estate values, increases in property taxes, fluctuations in interest rates, limited availability of mortgage financing, decreases in revenues from underlying real estate assets, declines in occupancy rates, changes in government regulations affecting zoning, land use, and rents, environmental liabilities, and risks related to the management skill and creditworthiness of the issuer. Companies in the real estate industry may also be subject to liabilities under environmental and hazardous waste laws, among others. REITs must satisfy specific requirements for favorable tax treatment and can involve unique risks in addition to the risks generally affecting the real estate industry. Changes in underlying real estate values may have an exaggerated effect to the extent that investments are concentrated in particular geographic regions or property types.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Focused Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Focused Investment Risk. To the extent the Fund has substantial investments in a relatively small number of securities or issuers, or a particular market, industry, group of industries, country, region, group of countries, asset class or sector, the Fund’s performance will be more susceptible to any single economic, market, political, or regulatory occurrence affecting those particular securities or issuers or that particular market, industry, group of industries, country, region, group of countries, asset class, or sector than a fund that invests more broadly.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Information Technology Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Information Technology Sector Risk. The value of Fund shares may be particularly impacted by events that adversely affect the information technology sector, such as rapid changes in technology product cycles, product obsolescence, government regulation, and competition, and may fluctuate more than that of a fund that does not concentrate in companies in the information technology sector.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Securities Lending Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Securities Lending Risk. Securities lending involves the risk that the Fund may lose money because the borrower of the loaned securities fails to return the securities in a timely manner or at all. The Fund also may lose rights in the collateral if the borrower fails financially. The Fund could also lose money if the value of the collateral decreases or if the value of any investments made with cash collateral declines.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Liquidity Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Liquidity Risk. The Fund is exposed to liquidity risk when trading volume, lack of a market maker or trading partner, large position size, market conditions, or legal restrictions impair its ability to sell particular investments or to sell them at advantageous market prices. Consequently, the Fund may have to accept a lower price to sell an investment or continue to hold it or keep the position open, sell other investments to raise cash or abandon an investment opportunity, any of which could have a negative effect on the Fund’s performance. These effects may be exacerbated during times of financial or political stress.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Investing in a Portfolio [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in a Portfolio. The Fund invests its assets in the Portfolio. This enables the Fund to pool its assets with other investors that also invest in the same Portfolio, resulting in efficiencies in management and administration that can lower the Fund’s costs and enhance shareholder returns. The ability of the Fund operating in a hub and spoke structure to meet its investment objective is directly related to the ability of the corresponding Portfolio to meet its objective. Contribution and withdrawal activities by other Portfolio investors may impact the management of the Portfolio and its ability to achieve its investment objective.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | Risks Associated with Active Management [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Risks Associated with Active Management. The success of the Fund’s investment strategy depends on portfolio management’s successful application of analytical skills and investment judgment. Active management involves subjective decisions and there is no guarantee that such decisions will produce the desired results or expected returns.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.1 | General Fund Investing Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | General Fund Investing Risks. The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. The Fund is designed to be a long-term investment vehicle and is not suited for short-term trading. Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective(s). In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. The Fund relies on various service providers, including the investment adviser and sub-adviser, if applicable, in its operations and is susceptible to operational, information security and related events (such as public health crises, cyber or hacking attacks) that may affect the service providers or the services that they provide to the Fund. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. |
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Risk Not Insured Depository Institution [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The value of investments held by the Fund may increase or decrease in response to social, economic, political, financial, public health crises or other disruptive events (whether real, expected or perceived) in the U.S. and global markets and include events such as war, natural disasters, epidemics and pandemics, terrorism, conflicts and social unrest. These events may negatively impact broad segments of businesses and populations and may exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted. Certain securities and other investments held by the Fund may experience increased volatility, illiquidity, or other potentially adverse effects in reaction to changing market conditions. Monetary and/or fiscal actions taken by U.S. or foreign governments to stimulate or stabilize the global economy may not be effective and could lead to high market volatility.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Equity Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Securities Risk. The value of equity securities and related instruments may decline in response to adverse changes in the economy or the economic outlook; deterioration in investor sentiment; interest rate, currency, and commodity price fluctuations; adverse geopolitical, social or environmental developments; issuer and sector-specific considerations; unexpected trading activity among retail investors; or other factors. Market conditions may affect certain types of stocks to a greater extent than other types of stocks. If the stock market declines in value, the value of the Fund’s equity securities will also likely decline. Although prices can rebound, there is no assurance that values will return to previous levels.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Growth Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Growth Risk. Because the Fund normally invests primarily in stocks of growth companies, it is subject to the risk of underperforming the overall stock market during periods in which stocks of such companies are out of favor and generate lower returns than the market as a whole.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Tax-Managed Investing Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tax-Managed Investing Risk. Market conditions may limit the Fund’s ability to generate tax losses or to generate dividend income taxed at favorable tax rates. The Fund’s tax-managed strategy may cause the Fund to hold a security in order to achieve more favorable tax-treatment or to sell a security in order to create tax losses. The Fund’s ability to utilize various tax-management techniques may be curtailed or eliminated by tax legislation, regulation or interpretations. Although the Fund expects that a smaller portion of its total return will consist of taxable distributions to shareholders as compared to equity mutual funds that are managed without regard to tax considerations, there can be no assurance about the size of taxable distributions to shareholders.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Foreign Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Investment Risk. Foreign investments can be adversely affected by political, economic and market developments abroad, including the imposition of economic and other sanctions by the United States or another country against a particular country or countries, organizations, entities and/or individuals. There may be less publicly available information about foreign issuers because they may not be subject to reporting practices, requirements or regulations comparable to those to which United States companies are subject. Adverse changes in investment regulations, capital requirements or exchange controls could adversely affect the value of the Fund’s investments. Foreign markets may be smaller, less liquid and more volatile than the major markets in the United States and, as a result, Fund share values may be more volatile. Trading in foreign markets typically involves higher expense than trading in the United States. The Fund may have difficulties enforcing its legal or contractual rights in a foreign country. Depositary receipts are subject to many of the risks associated with investing directly in foreign instruments, including the political and economic risks of the underlying issuer’s country and, in the case of depositary receipts traded on foreign markets, currency risk.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Emerging Markets Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Emerging Markets Investment Risk. Investment markets within emerging market countries are typically smaller, less liquid, less developed and more volatile than those in more developed markets like the United States, and may be focused in certain sectors. Emerging market securities often involve greater risks than developed market securities. The information available about an emerging market issuer may be less reliable than for comparable issuers in more developed capital markets.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Currency Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Currency Risk. Exchange rates for currencies fluctuate daily. The value of foreign investments may be affected favorably or unfavorably by changes in currency exchange rates in relation to the U.S. dollar. Currency markets generally are not as regulated as securities markets and currency transactions are subject to settlement, custodial and other operational risks.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | ETF Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | ETF Risk. ETFs are subject to the risks of investing in the underlying securities or other investments. ETF shares may trade at a premium or discount to net asset value and are subject to secondary market trading risks. In addition, the Fund will bear a pro rata portion of the operating expenses of an ETF in which it invests.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Real Estate Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Real Estate Risk. Real estate investments are subject to risks associated with owning real estate, including declines in real estate values, increases in property taxes, fluctuations in interest rates, limited availability of mortgage financing, decreases in revenues from underlying real estate assets, declines in occupancy rates, changes in government regulations affecting zoning, land use, and rents, environmental liabilities, and risks related to the management skill and creditworthiness of the issuer. Companies in the real estate industry may also be subject to liabilities under environmental and hazardous waste laws, among others. REITs must satisfy specific requirements for favorable tax treatment and can involve unique risks in addition to the risks generally affecting the real estate industry. Changes in underlying real estate values may have an exaggerated effect to the extent that investments are concentrated in particular geographic regions or property types.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Focused Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Focused Investment Risk. To the extent the Fund has substantial investments in a relatively small number of securities or issuers, or a particular market, industry, group of industries, country, region, group of countries, asset class or sector, the Fund’s performance will be more susceptible to any single economic, market, political, or regulatory occurrence affecting those particular securities or issuers or that particular market, industry, group of industries, country, region, group of countries, asset class, or sector than a fund that invests more broadly.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Information Technology Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Information Technology Sector Risk. The value of Fund shares may be particularly impacted by events that adversely affect the information technology sector, such as rapid changes in technology product cycles, product obsolescence, government regulation, and competition, and may fluctuate more than that of a fund that does not concentrate in companies in the information technology sector.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Securities Lending Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Securities Lending Risk. Securities lending involves the risk that the Fund may lose money because the borrower of the loaned securities fails to return the securities in a timely manner or at all. The Fund also may lose rights in the collateral if the borrower fails financially. The Fund could also lose money if the value of the collateral decreases or if the value of any investments made with cash collateral declines.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Liquidity Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Liquidity Risk. The Fund is exposed to liquidity risk when trading volume, lack of a market maker or trading partner, large position size, market conditions, or legal restrictions impair its ability to sell particular investments or to sell them at advantageous market prices. Consequently, the Fund may have to accept a lower price to sell an investment or continue to hold it or keep the position open, sell other investments to raise cash or abandon an investment opportunity, any of which could have a negative effect on the Fund’s performance. These effects may be exacerbated during times of financial or political stress.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Investing in a Portfolio [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in a Portfolio. The Fund invests its assets in the Portfolio. This enables the Fund to pool its assets with other investors that also invest in the same Portfolio, resulting in efficiencies in management and administration that can lower the Fund’s costs and enhance shareholder returns. The ability of the Fund operating in a hub and spoke structure to meet its investment objective is directly related to the ability of the corresponding Portfolio to meet its objective. Contribution and withdrawal activities by other Portfolio investors may impact the management of the Portfolio and its ability to achieve its investment objective.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | Risks Associated with Active Management [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Risks Associated with Active Management. The success of the Fund’s investment strategy depends on portfolio management’s successful application of analytical skills and investment judgment. Active management involves subjective decisions and there is no guarantee that such decisions will produce the desired results or expected returns.
|
| Eaton Vance Tax-Managed Growth Funds | Eaton Vance Tax-Managed Growth Fund 1.2 | General Fund Investing Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | General Fund Investing Risks. The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. The Fund is designed to be a long-term investment vehicle and is not suited for short-term trading. Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective(s). In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. The Fund relies on various service providers, including the investment adviser and sub-adviser, if applicable, in its operations and is susceptible to operational, information security and related events (such as public health crises, cyber or hacking attacks) that may affect the service providers or the services that they provide to the Fund. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. |
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The value of investments held by the Fund may increase or decrease in response to social, economic, political, financial, public health crises or other disruptive events (whether real, expected or perceived) in the U.S. and global markets and include events such as war, natural disasters, epidemics and pandemics, terrorism, conflicts and social unrest. These events may negatively impact broad segments of businesses and populations and may exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted. Certain securities and other investments held by the Fund may experience increased volatility, illiquidity, or other potentially adverse effects in reaction to changing market conditions. Monetary and/or fiscal actions taken by U.S. or foreign governments to stimulate or stabilize the global economy may not be effective and could lead to high market volatility.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Equity Securities Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Securities Risk. The value of equity securities and related instruments may decline in response to adverse changes in the economy or the economic outlook; deterioration in investor sentiment; interest rate, currency, and commodity price fluctuations; adverse geopolitical, social or environmental developments; issuer and sector-specific considerations; unexpected trading activity among retail investors; or other factors. Market conditions may affect certain types of stocks to a greater extent than other types of stocks. If the stock market declines in value, the value of the Fund’s equity securities will also likely decline. Although prices can rebound, there is no assurance that values will return to previous levels.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Foreign Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Investment Risk. Foreign investments can be adversely affected by political, economic and market developments abroad, including the imposition of economic and other sanctions by the United States or another country against a particular country or countries, organizations, entities and/or individuals. There may be less publicly available information about foreign issuers because they may not be subject to reporting practices, requirements or regulations comparable to those to which United States companies are subject. Adverse changes in investment regulations, capital requirements or exchange controls could adversely affect the value of the Fund’s investments. Foreign markets may be smaller, less liquid and more volatile than the major markets in the United States and, as a result, Fund share values may be more volatile. Trading in foreign markets typically involves higher expense than trading in the United States. The Fund may have difficulties enforcing its legal or contractual rights in a foreign country. Depositary receipts are subject to many of the risks associated with investing directly in foreign instruments, including the political and economic risks of the underlying issuer’s country and, in the case of depositary receipts traded on foreign markets, currency risk.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Emerging Markets Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Emerging Markets Investment Risk. Investment markets within emerging market countries are typically smaller, less liquid, less developed and more volatile than those in more developed markets like the United States, and may be focused in certain sectors. Emerging market securities often involve greater risks than developed market securities. The information available about an emerging market issuer may be less reliable than for comparable issuers in more developed capital markets.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Currency Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Currency Risk. Exchange rates for currencies fluctuate daily. The value of foreign investments may be affected favorably or unfavorably by changes in currency exchange rates in relation to the U.S. dollar. Currency markets generally are not as regulated as securities markets and currency transactions are subject to settlement, custodial and other operational risks.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | ETF Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | ETF Risk. ETFs are subject to the risks of investing in the underlying securities or other investments. ETF shares may trade at a premium or discount to net asset value and are subject to secondary market trading risks. In addition, the Fund will bear a pro rata portion of the operating expenses of an ETF in which it invests.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Real Estate Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Real Estate Risk. Real estate investments are subject to risks associated with owning real estate, including declines in real estate values, increases in property taxes, fluctuations in interest rates, limited availability of mortgage financing, decreases in revenues from underlying real estate assets, declines in occupancy rates, changes in government regulations affecting zoning, land use, and rents, environmental liabilities, and risks related to the management skill and creditworthiness of the issuer. Companies in the real estate industry may also be subject to liabilities under environmental and hazardous waste laws, among others. REITs must satisfy specific requirements for favorable tax treatment and can involve unique risks in addition to the risks generally affecting the real estate industry. Changes in underlying real estate values may have an exaggerated effect to the extent that investments are concentrated in particular geographic regions or property types.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Focused Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Focused Investment Risk. To the extent the Fund has substantial investments in a relatively small number of securities or issuers, or a particular market, industry, group of industries, country, region, group of countries, asset class or sector, the Fund’s performance will be more susceptible to any single economic, market, political, or regulatory occurrence affecting those particular securities or issuers or that particular market, industry, group of industries, country, region, group of countries, asset class, or sector than a fund that invests more broadly.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Information Technology Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Information Technology Sector Risk. The value of Fund shares may be particularly impacted by events that adversely affect the information technology sector, such as rapid changes in technology product cycles, product obsolescence, government regulation, and competition, and may fluctuate more than that of a fund that does not concentrate in companies in the information technology sector.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Liquidity Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Liquidity Risk. The Fund is exposed to liquidity risk when trading volume, lack of a market maker or trading partner, large position size, market conditions, or legal restrictions impair its ability to sell particular investments or to sell them at advantageous market prices. Consequently, the Fund may have to accept a lower price to sell an investment or continue to hold it or keep the position open, sell other investments to raise cash or abandon an investment opportunity, any of which could have a negative effect on the Fund’s performance. These effects may be exacerbated during times of financial or political stress.
|
| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Investing in a Portfolio [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investing in a Portfolio. The Fund invests its assets in the Portfolio. This enables the Fund to pool its assets with other investors that also invest in the same Portfolio, resulting in efficiencies in management and administration that can lower the Fund’s costs and enhance shareholder returns. The ability of the Fund operating in a hub and spoke structure to meet its investment objective is directly related to the ability of the corresponding Portfolio to meet its objective. Contribution and withdrawal activities by other Portfolio investors may impact the management of the Portfolio and its ability to achieve its investment objective.
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| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Risks Associated with Active Management [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Risks Associated with Active Management. The success of the Fund’s investment strategy depends on portfolio management’s successful application of analytical skills and investment judgment. Active management involves subjective decisions and there is no guarantee that such decisions will produce the desired results or expected returns. The portfolio manager also uses quantitative portfolio optimization and risk management techniques in making investment decisions for the Fund. There can be no assurance that these techniques will achieve the desired results.
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| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | General Fund Investing Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | General Fund Investing Risks. The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. The Fund is designed to be a long-term investment vehicle and is not suited for short-term trading. Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective(s). In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. The Fund relies on various service providers, including the investment adviser and sub-adviser, if applicable, in its operations and is susceptible to operational, information security and related events (such as public health crises, cyber or hacking attacks) that may affect the service providers or the services that they provide to the Fund. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
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| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Smaller Company Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Smaller Company Risk. The stocks of smaller, less seasoned companies are generally subject to greater price fluctuations, limited liquidity, higher transaction costs and higher investment risk than the stocks of larger, more established companies. Such companies may have limited product lines, markets or financial resources, may be dependent on a limited management group, and may lack substantial capital reserves or an established performance record. There may be generally less publicly available information about such companies than for larger, more established companies. Stocks of these companies frequently have lower trading volumes making them more volatile and potentially less liquid and more difficult to value.
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| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Sector Risk. Because the Fund may invest a significant portion of its assets in one or more industries, the value of Fund shares may be affected by events that adversely affect a particular sector and may fluctuate more than that of a fund that invests more broadly.
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| Eaton Vance Stock Fund - Clasess A, C and I | Eaton Vance Stock Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The Fund’s exposure to derivatives involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other investments. The use of derivatives can lead to losses because of adverse movements in the price or value of the security, instrument, index, currency, commodity, economic indicator or event underlying a derivative (“reference instrument”), due to failure of a counterparty or due to tax or regulatory constraints. Derivatives may create leverage in the Fund, which represents a non-cash exposure to the underlying reference instrument. Leverage can increase both the risk and return potential of the Fund. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund. Use of derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. Changes in the value of a derivative (including one used for hedging) may not correlate perfectly with the underlying reference instrument. Derivative instruments traded in over-the-counter markets may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying reference instrument. If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in (or be unable to achieve) the return of collateral or other assets held by the counterparty. The loss on derivative transactions may substantially exceed the initial investment. A derivative investment also involves the risks relating to the reference instrument underlying the investment.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Risk Lose Money [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. |
| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Risk Not Insured Depository Institution [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. |
| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Market Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The value of investments held by the Fund may increase or decrease in response to social, economic, political, financial, public health crises or other disruptive events (whether real, expected or perceived) in the U.S. and global markets and include events such as war, natural disasters, epidemics and pandemics, terrorism, conflicts and social unrest. These events may negatively impact broad segments of businesses and populations and may exacerbate pre-existing risks to the Fund. The frequency and magnitude of resulting changes in the value of the Fund’s investments cannot be predicted. Certain securities and other investments held by the Fund may experience increased volatility, illiquidity, or other potentially adverse effects in reaction to changing market conditions. Monetary and/or fiscal actions taken by U.S. or foreign governments to stimulate or stabilize the global economy may not be effective and could lead to high market volatility. No active trading market may exist for certain investments held by the Fund, which may impair the ability of the Fund to sell or to realize the current valuation of such investments in the event of the need to liquidate such assets.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | ETF Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | ETF Risk. ETFs are subject to the risks of investing in the underlying securities or other investments. ETF shares may trade at a premium or discount to net asset value and are subject to secondary market trading risks. In addition, the Fund will bear a pro rata portion of the operating expenses of an ETF in which it invests.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Focused Investment Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Focused Investment Risk. To the extent the Fund has substantial investments in a relatively small number of securities or issuers, or a particular market, industry, group of industries, country, region, group of countries, asset class or sector, the Fund’s performance will be more susceptible to any single economic, market, political, or regulatory occurrence affecting those particular securities or issuers or that particular market, industry, group of industries, country, region, group of countries, asset class, or sector than a fund that invests more broadly.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Liquidity Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Liquidity Risk. The Fund is exposed to liquidity risk when trading volume, lack of a market maker or trading partner, large position size, market conditions, or legal restrictions impair its ability to sell particular investments or to sell them at advantageous market prices. Consequently, the Fund may have to accept a lower price to sell an investment or continue to hold it or keep the position open, sell other investments to raise cash or abandon an investment opportunity, any of which could have a negative effect on the Fund’s performance. These effects may be exacerbated during times of financial or political stress.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | General Fund Investing Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | General Fund Investing Risks. The Fund is not a complete investment program and there is no guarantee that the Fund will achieve its investment objective. It is possible to lose money by investing in the Fund. The Fund is designed to be a long-term investment vehicle and is not suited for short-term trading. Investors in the Fund should have a long-term investment perspective and be able to tolerate potentially sharp declines in value. Purchase and redemption activities by Fund shareholders may impact the management of the Fund and its ability to achieve its investment objective(s). In addition, the redemption by one or more large shareholders or groups of shareholders of their holdings in the Fund could have an adverse impact on the remaining shareholders in the Fund. The Fund relies on various service providers, including the investment adviser and sub-adviser, if applicable, in its operations and is susceptible to operational, information security and related events (such as public health crises, cyber or hacking attacks) that may affect the service providers or the services that they provide to the Fund. An investment in the Fund is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Sector Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Sector Risk. Because the Fund may have significant investments in a particular sector of the commodities markets (such as agricultural, energy, livestock, precious metals, industrial metals and others), the value of Fund shares may be affected by events that adversely affect that sector and may fluctuate more than that of a fund that invests more broadly.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Commodity-Related Investments Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Commodity-Related Investments Risk. The value of commodity investments will generally be affected by overall market movements and factors specific to a particular industry or commodity, which may include weather, embargoes, tariffs, and health, political, international and regulatory developments. Economic and other events (whether real or perceived) can reduce the demand for commodities, which may reduce market prices and cause the value of the Fund’s commodity investments to fall. The frequency and magnitude of such changes are unpredictable. Exposure to commodities and commodity markets may subject the Fund to greater volatility than investments in traditional securities. No active trading market may exist for certain commodity investments, which may impair the ability of the Fund to sell or to realize the full value of such investments in the event of the need to liquidate such investments. In addition, adverse market conditions may impair the liquidity of actively traded commodity investments. Commodity-linked notes may be structured such that their performance deviates significantly from the underlying index or instrument. As noted above, the Fund expects to invest in the Subsidiary, which invests in commodity-related investments, as well as other permitted instruments. The Subsidiary is subject to the laws of the Cayman Islands and is not subject to U.S. laws, including securities laws and their protections and provisions of the Internal Revenue Code (the “Code”). Because the Subsidiary is not registered under U.S. federal securities laws, it may not be able to negotiate terms with its counterparties that are equivalent to those of a registered fund. As a result, the Subsidiary may have greater exposure to those counterparties than a registered fund. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Subsidiary to operate as described, and could adversely affect the Fund’s investment approach. In addition, commodity-related investments generally generate income that is not qualifying income for purposes of meeting source of income tests applicable to mutual funds under the Code. The Internal Revenue Service (“IRS”) has issued proposed regulations effectively providing that the Subsidiary’s realized annual net profit, if any, will constitute “qualifying income” only to the extent it is timely and currently repatriated to the Fund (notwithstanding any previously issued private letter ruling or advice from counsel). As the Fund intends to satisfy the source of income tests under the Code, its ability to invest in commodity-related investments may become limited, and the Fund may incur transaction and other costs to comply with any new or additional guidance from the IRS. The tax treatment of commodity-related investments and income from the Subsidiary may be adversely affected by future legislation, Treasury Regulations and/or guidance issued by the IRS that could affect the character, timing and/or amount of the Fund’s taxable income or any gains and distributions made by the Fund.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Tracking Error Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Tracking Error Risk. Tracking error risk refers to the risk that the Fund’s performance may not match or correlate to that of the commodities or basket of commodities it attempts to track, either on a daily or aggregate basis. Factors such as Fund expenses, imperfect correlation between the Fund’s investments and the commodities or basket of commodities, rounding of share prices, changes to the composition of the commodities or basket of commodities, regulatory policies high portfolio turnover rate and the use of leverage all contribute to tracking error. Tracking error risk may cause the Fund’s performance to be less than expected.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Derivatives Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Derivatives Risk. The Fund’s exposure to derivatives involves risks different from, or possibly greater than, the risks associated with investing directly in securities and other investments. The use of derivatives can lead to losses because of adverse movements in the price or value of the security, instrument, index, currency, commodity, economic indicator or event underlying a derivative (“reference instrument”), due to failure of a counterparty or due to tax or regulatory constraints. Derivatives may create leverage in the Fund, which represents a non-cash exposure to the underlying reference instrument. Leverage can increase both the risk and return potential of the Fund. Derivatives risk may be more significant when derivatives are used to enhance return or as a substitute for a cash investment position, rather than solely to hedge the risk of a position held by the Fund. Use of derivatives involves the exercise of specialized skill and judgment, and a transaction may be unsuccessful in whole or in part because of market behavior or unexpected events. Changes in the value of a derivative (including one used for hedging) may not correlate perfectly with the underlying reference instrument. Derivative instruments traded in over-the-counter markets may be difficult to value, may be illiquid, and may be subject to wide swings in valuation caused by changes in the value of the underlying reference instrument. If a derivative’s counterparty is unable to honor its commitments, the value of Fund shares may decline and the Fund could experience delays in (or be unable to achieve) the return of collateral or other assets held by the counterparty. The loss on derivative transactions may substantially exceed the initial investment. A derivative investment also involves the risks relating to the reference instrument underlying the investment.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Leverage Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Leverage Risk. Certain Fund transactions may give rise to leverage. Leverage can result from a non-cash exposure to an underlying reference instrument. Leverage can increase both the risk and return potential of the Fund. The use of leverage may cause the Fund to maintain liquid assets or liquidate portfolio positions when it may not be advantageous to do so to satisfy its obligations. Leverage may cause the Fund’s share price to be more volatile than if it had not been leveraged, as certain types of leverage may exaggerate the effect of any increase or decrease in the value of the Fund’s portfolio securities. The Fund may not be able to adjust its use of leverage rapidly enough to respond to interest rate volatility, inflation, and other changing market conditions. As a result, the Fund’s use of leverage may have a negative impact on the Fund’s performance from time to time. The loss on leveraged investments may substantially exceed the initial investment.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Interest Rate Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Interest Rate Risk. In general, the value of income securities will fluctuate based on changes in interest rates. The value of these securities is likely to increase when interest rates fall and decline when interest rates rise. Duration measures the time-weighted expected cash flows of a fixed-income security, while maturity refers to the amount of time until a fixed-income security matures. Generally, securities with longer durations or maturities are more sensitive to changes in interest rates than securities with shorter durations or maturities, causing them to be more volatile. Conversely, fixed-income securities with shorter durations or maturities will be less volatile but may provide lower returns than fixed-income securities with longer durations or maturities. In a rising interest rate environment, the duration of income securities that have the ability to be prepaid or called by the issuer may be extended. In a declining interest rate environment, the proceeds from prepaid or maturing instruments may have to be reinvested at a lower interest rate.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Credit Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Credit Risk. Investments in income securities are subject to the risk of non-payment of scheduled principal and interest. Changes in economic conditions or other circumstances may reduce the capacity of the party obligated to make principal and interest payments on such instruments and may lead to defaults. Such non-payments and defaults may reduce the value of Fund shares and income distributions. The value of debt instruments also may decline because of concerns about the issuer’s ability to make principal and interest payments. In addition, the credit ratings of debt instruments may be lowered if the financial condition of the party obligated to make payments with respect to such instruments deteriorates. In the event of bankruptcy of the issuer of a debt instrument, the Fund could experience delays or limitations with respect to its ability to realize the benefits of any collateral securing the instrument. In order to enforce its rights in the event of a default, bankruptcy or similar situation, the Fund may be required to retain legal or similar counsel, which may increase the Fund’s operating expenses and adversely affect net asset value.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | U.S. Treasury Securities | |
| Prospectus [Line Items] | |
| Risk [Text Block] | U.S. Treasury Securities. U.S. Treasury securities (“Treasury Securities”) are obligations of the U.S. Treasury that differ in their interest rates, maturities and times of issuance. Treasury Securities include any security or agreement collateralized or otherwise secured by Treasury Securities. As a result of their high credit quality and market liquidity, U.S. Treasury securities generally provide a lower current return than obligations of other issuers.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Inflation-Linked Investments Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Inflation-Linked Investments Risk. Inflation-linked investments are subject to the effects of changes in market interest rates caused by factors other than inflation (real interest rates). In general, the price of an inflation-linked investment tends to decrease when real interest rates increase and increase when real interest rates decrease. Interest payments on inflation-linked investments may vary widely and will fluctuate as the principal and interest are adjusted for inflation. Any increase in the principal amount of an inflation-linked investment will be considered taxable ordinary income, even though the Fund will not receive the principal until maturity. There can be no assurance that the inflation index used will accurately measure the real rate of inflation in the prices of goods and services. The Fund’s investments in inflation-linked investments may lose value in the event that the actual rate of inflation is different from the rate of the inflation index.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Money Market Instrument Risk [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Money Market Instrument Risk. Money market instruments may be adversely affected by market and economic events, such as a sharp rise in prevailing short-term interest rates; adverse developments in the banking industry, which issues or guarantees many money market instruments; adverse economic, political or other developments affecting issuers of money market instruments; changes in the credit quality of issuers; and default by a counterparty.
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| Parametric Commodity Strategy Fund – Classes A and I | Parametric Commodity Strategy Fund | Rules-Based Management Risks [Member] | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Rules-Based Management Risks. The sub-adviser uses proprietary investment techniques and analyses in making investment decisions for the Fund, seeking to achieve its investment objective while minimizing exposure to security-specific risk. The strategy seeks to take advantage of certain quantitative and behavioral market characteristics identified by the sub-adviser, utilizing a rules-based process and systematic rebalancing. A systematic investment process is dependent on the sub-adviser’s skill in developing and maintaining that process. The Fund’s strategy has not been independently tested or validated, and there can be no assurance that it will achieve the desired results.
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