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AB International Low Volatility Equity ETF  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading SUMMARY INFORMATION AB International Low Volatility Equity ETF
Objective [Heading] rr_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Fund’s investment objective is to seek long-term growth of capital.
Expense [Heading] rr_ExpenseHeading FEES AND EXPENSES OF THE FUND
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in shares, which are not reflected in the tables or the examples below.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund pays transaction costs, such as commissions, when it buys or 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 transaction costs, which are not reflected in the Annual Fund Operating Expenses or in the Examples, affect the Fund’s performance. During the most recent fiscal year of the Predecessor Fund (as defined below), the Predecessor Fund’s portfolio turnover rate was 42% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 42.00%
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Total “Other Expenses” are based on estimated amounts for the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading Examples
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
The Examples are intended to help you compare the cost of investing in the Fund with the cost of investing in other funds. The Examples assume that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Examples also assume that your investment has a 5% return each year and that the Fund’s operating expenses stay the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading PRINCIPAL STRATEGIES
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund is an actively-managed exchange-traded fund (“ETF”). The Adviser seeks to achieve the Fund’s investment objective by investing, under normal circumstances, at least 80% of its net assets, including any borrowings for investment purposes, in equity securities of non‑U.S. companies, and in companies in at least three countries other than the United States.
The Fund invests in companies that are determined by the Adviser to offer favorable long-term sustainable profitability, price stability, and attractive valuations. The Adviser employs an integrated approach that combines both fundamental and quantitative research to identify attractive investment opportunities. Factors that the Adviser considers in this regard include: a company’s record and projections of profitability, accuracy and availability of information with respect to the company, success and experience of management, competitive advantage, low stock price volatility, and liquidity of the company’s securities. The Adviser compares
these results to the characteristics of the general stock markets to determine the relative attractiveness of each company at a given time. The Adviser weighs economic, political and market factors in making investment decisions. The Adviser seeks to manage the Fund so that it is subject to less share price volatility than many other international mutual funds, although there can be no guarantee that the Adviser will be successful in this regard.
The Fund primarily invests in mid‑ and large-capitalization companies, which are currently defined for the Fund as companies that have market capitalizations of $1.5 billion or more. The Fund’s holdings of non‑U.S. companies will generally include some companies located in emerging markets.
Fluctuations in currency exchange rates can have a dramatic impact on the returns of equity securities. The Adviser may adjust the foreign currency exposure resulting from the Fund’s security positions through the use of currency-related derivatives, primarily in an effort to minimize the currency risk to which the Fund is subject. However, the Adviser is not required to use such derivatives.
Risk [Heading] rr_RiskHeading PRINCIPAL RISKS
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading BAR CHART AND PERFORMANCE INFORMATION
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The performance information shown below provides some indications of the risks of investing in this Fund. Prior to commencing operations, the Fund acquired the assets and liabilities of AB International Low Volatility Equity Portfolio (a “Predecessor Fund”), a series of AB Cap Fund, Inc., and adopted the accounting and performance history of that fund (a “Reorganization”), as of the close of business on July 12, 2024. The Fund has the same investment objective, strategies, policies and portfolio management team as the Predecessor Fund.
The performance of the Predecessor Fund shown below has not been adjusted to reflect the lower fees and expenses that will be incurred by the Fund. The Predecessor Fund was a mutual fund, and the average annual total returns as shown below are based on NAV per share, and are not based on market prices for an ETF share as traded on an exchange. Predecessor Fund performance is based on the performance of Advisor Class shares. Prior to the Fund’s acquisition of the Predecessor Fund, the other share classes of the Predecessor Fund were converted into Advisor Class shares.
The bar chart and performance information provide an indication of the historical risk of an investment in the Fund by showing:
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how the Predecessor Fund’s performance changed from year to year over the life of the Predecessor Fund; and
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how the Predecessor Fund’s average annual returns for one year, five years and since inception compare to those of a broad-based securities market index.
You may obtain updated performance information at www.abfunds.com (click on “Investments—ETFs”).
Past performance, as shown for the Predecessor Fund, before and after taxes, does not necessarily indicate how the Fund will perform in the future.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns how the Predecessor Fund’s performance changed from year to year over the life of the Predecessor Fund; andhow the Predecessor Fund’s average annual returns for one year, five years and since inception compare to those of a broad-based securities market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.abfunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance, as shown for the Predecessor Fund, before and after taxes, does not necessarily indicate how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Bar Chart
Bar Chart Narrative [Text Block] rr_BarChartNarrativeTextBlock
The annual returns in the bar chart are for the Predecessor Fund’s Advisor Class shares, which were reorganized into shares of the Fund.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Calendar Year End (%) During the period shown in the bar chart, the Predecessor Fund’s: Best Quarter was up 13.50%, 2nd quarter, 2020; and Worst Quarter was down -19.84%, 1st quarter, 2020.
Performance Table Heading rr_PerformanceTableHeading Performance Table Average Annual Total Returns (For the periods ended December 31, 2023)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns:–Are an estimate, which is based on the highest historical individual federal marginal income tax rates, and do not reflect the impact of state and local taxes;
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred actual after-tax returns depend on an individual investor’s tax situation and are likely to differ from those shown; and–Are not relevant to investors who hold Predecessor Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.
AB International Low Volatility Equity ETF | Risk Lose Money [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
As with all investments, you may lose money by investing in the Fund.
AB International Low Volatility Equity ETF | Market Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
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Market Risk: The value of the Fund’s assets will fluctuate as the market or markets in which the Fund invests fluctuate. The value of the Fund’s investments may decline, sometimes rapidly and unpredictably, simply because of economic changes or other events, including public health crises (including the occurrence of a contagious disease or illness), interest rate levels, and regional and global conflicts, that affect large portions of the market. It includes the risk that a particular style of investing may be underperforming the market generally.
AB International Low Volatility Equity ETF | Equity Securities Risk [Member]  
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Risk [Text Block] rr_RiskTextBlock
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Equity Securities Risk: The Fund invests in publicly-traded equity securities, and their value may fluctuate, sometimes rapidly and unpredictably, which means a security may be worth more or less than when it was purchased. These fluctuations can be based on a variety of factors including a company’s financial condition as well as macro-economic factors such as interest rates, inflation rates, global market conditions, and non-economic factors such as market perceptions and social or political events.
AB International Low Volatility Equity ETF | Foreign Non U S Investments Risk [Member]  
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Risk [Text Block] rr_RiskTextBlock
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Foreign (Non-U.S.) Investments Risk: Investments in securities of non-U.S. issuers may involve more risk than those of U.S. issuers. These securities may fluctuate more widely in price and may be more difficult to trade than domestic securities due to adverse market, economic, political, regulatory or other factors.
AB International Low Volatility Equity ETF | Currency Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
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Currency Risk: Fluctuations in currency exchange rates may negatively affect the value of the Fund’s investments or reduce its returns.
AB International Low Volatility Equity ETF | Capitalization Risk [Member]  
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Risk [Text Block] rr_RiskTextBlock
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Capitalization Risk: Investments in mid-capitalization companies may be more volatile than investments in large-capitalization companies. Investments in mid-capitalization companies may have additional risks because these companies have limited product lines, markets or financial resources.
AB International Low Volatility Equity ETF | Derivatives Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
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Derivatives Risk: Derivatives may be difficult to price or unwind and may be leveraged so that small changes may produce disproportionate losses for the Fund. A short position in a derivative instrument involves the risk of a theoretically unlimited increase in the value of the underlying asset, reference rate or index, which could cause the Fund to suffer a potentially unlimited loss. Derivatives, especially over-the-counter derivatives, are also subject to counterparty risk, which is the risk that the counterparty (the party on the other side of the transaction) on a derivative transaction will be unable or unwilling to honor its contractual obligations to the Fund.
AB International Low Volatility Equity ETF | ETF Share Price and Net Asset Value Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
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ETF Share Price and Net Asset Value Risk: The Fund’s shares are listed for trading on the NYSE Arca, Inc. (the “Exchange”). Shares are generally bought and sold in the secondary market at market prices. The net asset value (“NAV”) per share of the Fund will fluctuate with changes in the market value of the Fund’s holdings. The Fund’s NAV is calculated once per day, at the end of the day. The market price of a share on the Exchange could be higher than the NAV (premium), or lower than the NAV (discount) and may fluctuate during the trading day. When all or a portion of the Fund’s underlying securities trade in a market that is closed when the market for the Fund’s shares is open, there may be differences between the current value of a security and the last quoted price for that security in the closed local market, which could lead to a deviation between the market value of the Fund’s shares and the Fund’s NAV. Disruptions in the creations and redemptions process or the existence of extreme market volatility could result in the Fund’s shares trading above or below NAV. As the Fund may invest in securities traded on foreign exchanges, Fund shares may trade at a larger premium or discount to the Fund’s NAV per share than shares of other ETFs. In addition, in stressed market conditions, the market for Fund shares may become less liquid in response to deteriorating liquidity in the markets for the Fund’s underlying portfolio holdings.
AB International Low Volatility Equity ETF | Authorized Participant Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
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Authorized Participant Risk: Only a limited number of financial institutions that enter into an authorized participant relationship with the Fund (“Authorized Participants”) may engage in creation or redemption transactions. If the Fund’s Authorized Participants decide not to create or redeem shares, Fund shares may trade at a larger premium or discount to the Fund’s NAV per share, or the Fund could face trading halts or de-listing.
AB International Low Volatility Equity ETF | Active Trading Market Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
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Active Trading Market Risk: There is no guarantee that an active trading market for Fund shares will exist at all times. In times of market stress, markets can suffer erratic or unpredictable trading activity, extraordinary volatility or wide bid/ask spreads,
 
which could cause some market makers and Authorized Participants to reduce their market activity or “step away” from making a market in ETF shares. Market makers and Authorized Participants are not obligated to place or execute purchase and redemption orders. This could cause the Fund’s market price to deviate, materially, from the NAV, and reduce the effectiveness of the ETF arbitrage process. Any absence of an active trading market for Fund shares could lead to a heightened risk that there will be a difference between the market price of a Fund share and the underlying value of the Fund share.
AB International Low Volatility Equity ETF | Management Risk [Member]  
Risk/Return: rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock
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Management Risk: The Fund is subject to management risk because it is an actively-managed ETF. The Adviser will apply its investment techniques and risk analyses in making investment decisions, but there is no guarantee that its techniques will produce the intended results. Some of these techniques may incorporate, or rely upon, quantitative models, but there is no guarantee that these models will generate accurate forecasts, reduce risk or otherwise perform as expected.
AB International Low Volatility Equity ETF | AB International Low Volatility Equity ETF  
Risk/Return: rr_RiskReturnAbstract  
Shareholder Fees (fees paid directly from your investment) rr_ShareholderFeeOther none
Management Fees rr_ManagementFeesOverAssets 0.50% [1]
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets none [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.50%
After 1 Year rr_ExpenseExampleYear01 $ 51
After 3 Years rr_ExpenseExampleYear03 160
After 5 Years rr_ExpenseExampleYear05 280
After 10 Years rr_ExpenseExampleYear10 $ 828
AB International Low Volatility Equity ETF | Advisor Class  
Risk/Return: rr_RiskReturnAbstract  
2014 rr_AnnualReturn2014
2015 rr_AnnualReturn2015
2016 rr_AnnualReturn2016 (0.15%)
2017 rr_AnnualReturn2017 24.61%
2018 rr_AnnualReturn2018 (8.79%)
2019 rr_AnnualReturn2019 18.03%
2020 rr_AnnualReturn2020 5.65%
2021 rr_AnnualReturn2021 9.84%
2022 rr_AnnualReturn2022 (14.65%)
2023 rr_AnnualReturn2023 15.55%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 13.50%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (19.84%)
1 Year rr_AverageAnnualReturnYear01 15.55% [3]
5 Year rr_AverageAnnualReturnYear05 6.20% [3]
Since Inception rr_AverageAnnualReturnSinceInception 5.01% [3],[4]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 29, 2015 [3]
AB International Low Volatility Equity ETF | Return After Taxes on Distributions | Advisor Class  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 15.15% [3],[5]
5 Year rr_AverageAnnualReturnYear05 6.01% [3],[5]
Since Inception rr_AverageAnnualReturnSinceInception 4.71% [3],[4],[5]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 29, 2015 [3],[5]
AB International Low Volatility Equity ETF | Return After Taxes on Distributions and Sale of Fund Shares | Advisor Class  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 9.84% [3],[5]
5 Year rr_AverageAnnualReturnYear05 4.93% [3],[5]
Since Inception rr_AverageAnnualReturnSinceInception 3.98% [3],[4],[5]
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 29, 2015 [3],[5]
AB International Low Volatility Equity ETF | MSCI EAFE Index (reflects no deduction for fees, expenses, or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 18.24%
5 Year rr_AverageAnnualReturnYear05 8.16%
Since Inception rr_AverageAnnualReturnSinceInception 4.92% [4]
[1]
The Fund’s investment advisory agreement provides that AllianceBernstein L.P. (the “Adviser”) will pay substantially all expenses of the Fund (including expenses of AB Active ETFs, Inc. relating to the Fund), except for the advisory fees, payments under the Fund’s 12b-1 plan (if any), interest expenses, taxes, acquired fund fees and expenses (other than fees and expenses for funds advised by the Adviser and/or its affiliates), and litigation and extraordinary expenses not incurred in the ordinary course of the Fund’s business. Additionally, the Fund shall be responsible for its non-operating expenses, including brokerage commissions.
[2]
Total “Other Expenses” are based on estimated amounts for the current fiscal year.
[3]
The table shows returns for the Predecessor Fund’s Advisor Class shares.
[4]
The inception date for Advisor Class shares of the Predecessor Fund was 7/29/15.
[5] After-tax returns: – Are an estimate, which is based on the highest historical individual federal marginal income tax rates, and do not reflect the impact of state and local taxes; actual after-tax returns depend on an individual investor’s tax situation and are likely to differ from those shown; and – Are not relevant to investors who hold Predecessor Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.