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Label Element Value
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading SEI QiM U.S. Equity Factor Allocation Active ETF
Objective [Heading] oef_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

Long-term growth of capital and income.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

The following table describes the fees and expenses that you will incur if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the fee table or example below.
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investments)
Other Expenses, New Fund, Based on Estimates [Text] oef_OtherExpensesNewFundBasedOnEstimates Other Expenses are based on estimated amounts for the current fiscal year and rounded to 0.00%.
Expense Example [Heading] oef_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of owning shares of the Fund with the cost of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.

Expense Example by, Year, Caption [Text] oef_ExpenseExampleByYearCaption Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio Turnover.
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock

The Fund may pay transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Example, affect the Fund's performance. Because the Fund is new, no portfolio turnover information has been provided.
Strategy [Heading] oef_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

Under normal circumstances, the Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity and equity-related securities of U.S. companies of all capitalization ranges. The Fund's investments in equity and equity-related securities may include common stock and preferred stock, structured notes and convertible bonds, and to a lesser extent, American Depositary Receipts (ADRs) and interests in U.S. real estate investment trusts (REITs).

The Fund seeks to provide long-term growth of capital and income by investing in U.S. equity securities that SEI Investments Management Corporation (SIMC or the Adviser) believes exhibit above-average profitability and earnings momentum while trading at a discount to their fair valuation. SIMC uses a quantitative-based, active stock selection investment strategy combined with portfolio optimization to construct the Fund's portfolio. SIMC's quantitative model evaluates all of the securities in the investment universe of U.S. issuers based on certain characteristics (Factors) that are determined by the Adviser and are grouped into families of Value, Momentum, Quality and Low Volatility. Each of these factor families are described in further detail in the "More Information About the Fund — Factors" section. The Adviser uses its own judgment and systems to assess which Factors to use and what portion of the Fund's assets should be invested in each security identified. Based on perceived market opportunities, the Adviser may allocate the Fund's assets to tilt in favor of one or more Factors. The Adviser may add, remove or modify certain Factors in its model based on investment research or in response to changes in market conditions.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block] fnd_NmRule35d1TermDfnSmryTextBlock The Fund's investments in equity and equity-related securities may include common stock and preferred stock, structured notes and convertible bonds, and to a lesser extent, American Depositary Receipts (ADRs) and interests in U.S. real estate investment trusts (REITs).The Fund seeks to provide long-term growth of capital and income by investing in U.S. equity securities that SEI Investments Management Corporation (SIMC or the Adviser) believes exhibit above-average profitability and earnings momentum while trading at a discount to their fair valuation.
Summary of Selection Criteria for Rule 35d-1 Term in Fund Name [Text Block] fnd_NmRule35d1TermSlctnCritSmryTextBlock SIMC uses a quantitative-based, active stock selection investment strategy combined with portfolio optimization to construct the Fund's portfolio. SIMC's quantitative model evaluates all of the securities in the investment universe of U.S. issuers based on certain characteristics (Factors) that are determined by the Adviser and are grouped into families of Value, Momentum, Quality and Low Volatility. Each of these factor families are described in further detail in the "More Information About the Fund — Factors" section. The Adviser uses its own judgment and systems to assess which Factors to use and what portion of the Fund's assets should be invested in each security identified. Based on perceived market opportunities, the Adviser may allocate the Fund's assets to tilt in favor of one or more Factors. The Adviser may add, remove or modify certain Factors in its model based on investment research or in response to changes in market conditions.
Rule 35d-1 Eighty Percent Investment Policy [Text Block] fnd_NmRule35d1EightyPctInvstmntPlcyTextBlock Under normal circumstances, the Fund will invest at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in equity and equity-related securities of U.S. companies of all capitalization ranges. The Fund's investments in equity and equity-related securities may include common stock and preferred stock, structured notes and convertible bonds, and to a lesser extent, American Depositary Receipts (ADRs) and interests in U.S. real estate investment trusts (REITs).
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

The Fund commenced operations on July 14, 2026. Because the Fund does not have a full calendar year of performance, performance results have not been provided. In the future, performance information for the Fund will be presented in this section. Updated performance is available on the Fund's website at www.seic.com/financial-advisors/flexible-investment-solutions/etfs/sei-qim-factor-etfs.

Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress www.seic.com/financial-advisors/flexible-investment-solutions/etfs/sei-qim-factor-etfs
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Risk Lose Money [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock As with any investment, you could lose all or part of your investment in the Fund, and the Fund's performance could trail that of other investments.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Risk Not Insured [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

An investment in the Fund is not a bank deposit and it is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency, SIMC or any of its affiliates.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Equity Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Equity Securities Risk. Equity securities are subject to changes in value, and their values may be more volatile than those of other asset classes.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Quality Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Quality Securities Risk. There is no guarantee that the past performance of stocks that SIMC determines are quality will continue. Companies that issue these stocks may experience lower than expected returns or may experience negative growth, as well as increased leverage, resulting in lower than expected or negative returns to Fund shareholders. Many factors can affect a stock's quality and performance, and the impact of these factors on a stock or its price can be difficult to predict.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Momentum Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Momentum Securities Risk. Stocks that previously exhibited high momentum characteristics may not experience positive momentum or may experience more volatility than the market as a whole.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Value Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Value Securities Risk. Securities issued by companies that may be perceived as undervalued may fail to appreciate for long periods of time and may never realize their full potential value. SIMC may be unsuccessful in identifying undervalued securities. Value securities have generally performed better than non-value securities during periods of economic recovery (although there is no assurance that they will continue to do so). Value securities may go in and out of favor over time.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Volatility Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Volatility Risk. Although SIMC seeks to construct a portfolio with lower volatility than the broad U.S. large cap equity market, there is no guarantee that SIMC will be successful. As a result, the Fund may not be any less volatile than the market as a whole, and could be more volatile.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Quantitative Investing Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Quantitative Investing Risk. Due to the significant role technology plays in quantitative strategies, they carry the risk of unintended or unrecognized issues or flaws in the design, coding, implementation or maintenance of the computer programs or technology used in the development and implementation of the quantitative strategy. Utility interruptions or other key systems outages also can impair the performance of quantitative investment strategies.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Market Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Market Risk. The market value of a security may move up and down, sometimes rapidly and unpredictably. Market risk may affect a single issuer, an industry, a sector or the equity or bond market as a whole. The Fund's market price may deviate from the value of the Fund's underlying portfolio holdings, particularly in times of market stress, with the result that investors may pay significantly more or receive significantly less than the underlying value of the Fund shares bought or sold. This can be reflected as a spread between the bid and ask prices for the Fund quoted during the day or a premium or discount in the closing price from the Fund's NAV.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Large Capitalization Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Large Capitalization Risk. The risk that larger, more established companies may be unable to respond quickly to new competitive challenges such as changes in technology and consumer tastes. Larger companies also may not be able to attain the high growth rates of successful smaller companies.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Small and Medium Capitalization Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Small and Medium Capitalization Risk. The risk that small and medium capitalization companies in which the Fund may invest may be more vulnerable to adverse business or economic events than larger, more established companies. In particular, small and medium capitalization companies may have limited product lines, markets and financial resources and may depend upon a relatively small management group. Therefore, small capitalization and medium capitalization stocks may be more volatile than those of larger companies. Small capitalization and medium capitalization stocks may be traded over-the-counter (OTC). OTC stocks may trade less frequently and in smaller volume than exchange listed stocks and may have more price volatility than that of exchange-listed stocks.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Investment Style [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Investment Style Risk. The risk that the Fund's investment strategy may underperform other segments of the equity markets or the equity markets as a whole.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Depositary Receipts Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Depositary Receipts Risk. Depositary receipts, such as ADRs, are certificates evidencing ownership of shares of a foreign issuer that are issued by depositary banks and generally trade on an established market. Depositary receipts are subject to many of the risks associated with investing directly in foreign securities, including, among other things, political, social and economic developments abroad, currency movements and different legal, regulatory, tax, accounting and audit environments.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Convertible and Preferred Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Convertible and Preferred Securities Risk. Convertible and preferred securities have many of the same characteristics as stocks, including many of the same risks. In addition, convertible securities may be more sensitive to changes in interest rates than stocks. Convertible securities may also have credit ratings below investment grade, meaning that they carry a higher risk of failure by the issuer to pay principal and/or interest when due.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Real Estate Investment Trusts (REITs) Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Real Estate Investment Trusts (REITs) Risk. REITs are trusts that invest primarily in commercial real estate or real estate-related loans. The Fund's investments in REITs will be subject to the risks associated with the direct ownership of real estate. Risks commonly associated with the direct ownership of real estate

include fluctuations in the value of underlying properties, defaults by borrowers or tenants, changes in interest rates and risks related to general or local economic conditions. Some REITs may have limited diversification and may be subject to risks inherent in financing a limited number of properties.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Structured Securities Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Structured Securities Risk. The payment and credit qualities of structured securities derive from their underlying assets, and they may behave in ways not anticipated by the Fund, or they may not receive tax, accounting or regulatory treatment anticipated by the Fund.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Risk of Investing in the U.S. [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Risk of Investing in the U.S. Certain changes in the U.S. economy, such as when the U.S. economy weakens or when its financial markets decline, may have an adverse effect on the securities to which the Fund has exposure.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Issuer Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Issuer Risk. The performance of the Fund depends on the performance of individual securities to which the Fund has exposure. Changes in the financial condition or credit rating of an issuer of those securities may cause the value of the Fund to decline.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Market Trading Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Market Trading Risk. The Fund faces numerous market trading risks, including the potential lack of an active market for Fund shares, losses from trading in secondary markets, periods of high volatility and disruptions in the creation/redemption process. Active trading markets for the Fund's shares may not be developed or maintained by market makers or Authorized Participants (as defined below). Authorized Participants are not obligated to make a market in the Fund's shares or to submit purchase or redemption orders for Creation Units (as defined below). In times of market stress, market makers or Authorized Participants may step away from their respective roles, which could lead to variances between the market price of the Fund's shares and its underlying NAV. Trading in shares on an exchange may be halted in certain circumstances. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. Any of these factors could lead the Fund's shares to trade at a premium or discount to NAV. Thus, you may pay more (or less) than NAV when you buy shares of the Fund in the secondary market, and you may receive less (or more) than NAV when you sell those shares in the secondary market, particularly during times of market stress. SIMC cannot predict whether shares will trade above (premium), below (discount) or at NAV or whether the spread between bid and ask prices will widen. In addition, there can be no assurance that the requirements of the listing exchange necessary to maintain the listing of the Fund will continue to be met.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Liquidity Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Liquidity Risk. In stressed market conditions, the market for the Fund's shares may become less liquid in response to deteriorating liquidity in the markets for the Fund's underlying portfolio holdings. This adverse effect on liquidity for the Fund's shares in turn could lead to differences between the market price of the Fund's shares and its underlying NAV and/or widening the spread between bid and ask prices.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Management Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Management Risk. SIMC may not successfully implement the Fund's investment strategies and, as a result, the Fund may not meet its investment objective and/or underperform other investment vehicles with similar investment objectives and strategies.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Operational Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Operational Risk. The Fund is exposed to operational risks arising from a number of factors, including, but not limited to, human error, processing and communication errors, errors of the Fund's service providers, counterparties or other third parties, failed or inadequate processes and technology or systems failures.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | New Fund Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

New Fund Risk. The Fund is a new fund, with a limited operating history, which may result in additional risks for investors in the Fund. There can be no assurance that the Fund will grow to an economically viable size, in which case the Fund may cease operations. In such an event, investors may be required to liquidate or transfer their investments at an inopportune time.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Authorized Participant Concentration Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Authorized Participant Concentration Risk. Only broker-dealers (referred to as Authorized Participants or APs) that have executed authorized participation agreements with respect to the Trust may engage in creation or redemption transactions directly with the Fund, and no AP is obligated to engage in creation and/or redemption transactions. To the extent that APs exit the business or are unable to proceed with orders, Fund shares may be more likely to trade at a premium or discount to NAV, have wider spreads between bid and ask prices, have wider spreads between bid and ask prices or face trading halts or delisting.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | Cybersecurity Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Cybersecurity Risk. Failures or breaches of the electronic systems of the Fund, SIMC, the Fund's distributor, and other service providers, market makers, APs or the issuers of securities in which the Fund invests have the ability to cause disruptions, negatively impact the Fund's business operations and/or potentially result in financial losses to the Fund and its shareholders.
SEI QIM U.S. Equity Factor Allocation Active ETF | SEI QiM U.S. Equity Factor Allocation Active ETF | SEI QIM U.S. Equity Factor Allocation Active ETF  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.30% [1]
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.00% [1],[2]
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.30%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 31
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 97
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 31
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 $ 97
[1] The investment advisory agreement between SEI Exchange Traded Funds (the Trust) and SEI Investments Management Corporation (SIMC), the Fund's adviser (the Investment Advisory Agreement) provides that SIMC will pay all operating expenses of the Fund, except the management fees, interest expenses, dividend and other expenses on securities sold short, taxes, expenses incurred with respect to the acquisition and disposition of portfolio securities and the execution of portfolio transactions (including brokerage commissions), acquired fund fees and expenses, distribution fees or expenses paid by the Trust under any distribution plan adopted pursuant to Rule 12b-1 under the 1940 Act (if any), fees and expenses of the Board of Trustees, litigation expenses and any extraordinary expense
[2] Other Expenses are based on estimated amounts for the current fiscal year and rounded to 0.00%.