v3.26.1
Label Element Value
SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk/Return [Heading] oef_RiskReturnHeading SEI QiM U.S. Large Cap Low Volatility Active ETF
Objective [Heading] oef_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock

Long-term capital appreciation with lower volatility relative to the broad U.S. large cap equity market.
Expense Heading [Optional Text] oef_ExpenseHeading Fees and Expenses of the Fund
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)
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.

During the most recent fiscal year, the Fund's portfolio turnover rate was 23% of the average value of its portfolio.
Portfolio Turnover, Rate oef_PortfolioTurnoverRate 23.00%
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 (such as convertible bonds, convertible preferred stock, depositary receipts, warrants and rights) issued by large U.S. companies.

The Fund seeks to provide long-term capital appreciation by investing primarily in U.S. common stocks, while aiming to experience lower volatility compared to the broad U.S. large cap equity market. SIMC uses a quantitative-based, active stock selection investment process to construct the Fund's portfolio, utilizing a combination of factor scoring model, risk model and optimization. The factor scoring model evaluates all of the securities in the investment universe of U.S. large-capitalization stocks based on measures of Value, Momentum, Quality and Low Volatility factor families. Each of the factor families is described in further detail in the "More Information About the Funds — Factors" section. The risk model predicts common factor and stock specific risks. The optimization process constructs a portfolio based on the desired exposure to certain factor characteristics and certain other investment restrictions, as weighed against the objective to achieve lower volatility than the broad U.S. large cap equity market.
Summary of Definition of Rule 35d-1 Term in Fund Name [Text Block] fnd_NmRule35d1TermDfnSmryTextBlock The Fund seeks to provide long-term capital appreciation by investing primarily in U.S. common stocks, while aiming to experience lower volatility compared to the broad U.S. large cap equity market.
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 process to construct the Fund's portfolio, utilizing a combination of factor scoring model, risk model and optimization. The factor scoring model evaluates all of the securities in the investment universe of U.S. large-capitalization stocks based on measures of Value, Momentum, Quality and Low Volatility factor families. Each of the factor families is described in further detail in the "More Information About the Funds — Factors" section. The risk model predicts common factor and stock specific risks. The optimization process constructs a portfolio based on the desired exposure to certain factor characteristics and certain other investment restrictions, as weighed against the objective to achieve lower volatility than the broad U.S. large cap equity market.
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 (such as convertible bonds, convertible preferred stock, depositary receipts, warrants and rights) issued by large U.S. companies.
Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past three calendar years and by showing how the Fund's average annual returns for 1 year and since the Fund's inception compare with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. For current performance information, please call 1-800-DIAL-SEI.
Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and the performance table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year for the past three calendar years and by showing how the Fund's average annual returns for 1 year and since the Fund's inception compare with those of a broad measure of market performance.
Performance Availability Phone [Text] oef_PerformanceAvailabilityPhone 1-800-DIAL-SEI
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock

Best Quarter: 7.77% (9/30/2024)
Worst Quarter: -4.94% (09/30/2023)
The Fund's total return (pre-tax) from January 1, 2026 to June 30, 2026 was 1.62%.
Year to Date Return, Label [Optional Text] oef_YearToDateReturnLabel The Fund's total return (pre-tax)
Bar Chart, Year to Date Return, Date oef_BarChartYearToDateReturnDate Jun. 30, 2026
Bar Chart, Year to Date Return oef_BarChartYearToDateReturn 1.62%
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Sep. 30, 2024
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 7.77%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Sep. 30, 2023
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (4.94%)
Performance Table Heading oef_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2025)
Index No Deduction for Fees, Expenses, or Taxes [Text] oef_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate oef_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred oef_PerformanceTableNotRelevantToTaxDeferred After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table Narrative oef_PerformanceTableNarrativeTextBlock

This table compares the Fund's average annual total returns for periods ended December 31, 2025 to those of a broad-based securities market index and an additional index with characteristics relevant to the Fund's investment strategy.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF | Risk Not Insured [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

An investment in the Funds 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF | Large-Capitalization Companies Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Large-Capitalization Companies Risk. Large-capitalization companies may be less able than smaller capitalization companies to adapt to changing market conditions, may be more mature and may be subject to more limited growth potential compared with smaller capitalization companies.
SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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 bonds may be more sensitive to changes in interest rates than stocks. Convertible bonds 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF | Depositary Receipts Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Depositary Receipts Risk. Depositary receipts, such as American Depositary Receipts, 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 environment.
SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF | Warrants and Rights Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Warrants and Rights Risk. Warrants and rights may lack a liquid secondary market for resale. The prices of warrants and rights may fluctuate as a result of speculation or other factors. Warrants and rights can provide a greater potential for profit or loss than an equivalent investment in the underlying security. Prices of warrants and rights do not necessarily move in tandem with the prices of their underlying securities and are highly volatile and speculative investments. If a warrant or right expires without being exercised, the Fund will lose any amount paid for the warrant or right.
SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF | Liquidity Risk [Member]  
Prospectus [Line Items] oef_ProspectusLineItems  
Risk [Text Block] oef_RiskTextBlock

Liquidity Risk. In stressed market conditions, the market for a 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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 or face trading halts or delisting.
SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility 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. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF  
Prospectus [Line Items] oef_ProspectusLineItems  
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.15% [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 0.15%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 15
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 48
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 85
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 192
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 15
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 48
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 85
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 192
SEI QiM U.S. Large Cap Low Volatility Active ETF | Russell 1000 Index Return (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Russell 1000 Index Return (reflects no deduction for fees, expenses or taxes)
Average Annual Return, Percent oef_AvgAnnlRtrPct 17.37%
Average Annual Return, Percent oef_AvgAnnlRtrPct 18.08%
SEI QiM U.S. Large Cap Low Volatility Active ETF | S&P 500 Index Return (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel S&P 500 Index Return (reflects no deduction for fees, expenses or taxes)
Average Annual Return, Percent oef_AvgAnnlRtrPct 17.88%
Average Annual Return, Percent oef_AvgAnnlRtrPct 18.33%
SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF  
Prospectus [Line Items] oef_ProspectusLineItems  
Annual Return [Percent] oef_AnnlRtrPct 6.50%
Annual Return [Percent] oef_AnnlRtrPct 14.81%
Annual Return [Percent] oef_AnnlRtrPct 12.76%
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Return Before Taxes
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.76%
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.68%
Performance Inception Date oef_PerfInceptionDate May 18, 2022
SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF | After Taxes on Distributions  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Return After Taxes on Distributions
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.29%
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.16%
SEI QiM U.S. Large Cap Low Volatility Active ETF | SEI QiM U.S. Large Cap Low Volatility Active ETF | After Taxes on Distributions and Sales  
Prospectus [Line Items] oef_ProspectusLineItems  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.87%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.49%
[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 expenses.
[2] The amount rounded to 0.00%.