| Form N-CSR Cover | 12 Months Ended |
| Sep. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | AB Active ETFs, Inc. |
| Entity Central Index Key | 0001496608 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| Shareholder Report | 12 Months Ended |
| Sep. 30, 2024 USD ($) | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | AB Active ETFs, Inc. |
| Entity Central Index Key | 0001496608 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| C000247934 | |
| Shareholder Report [Line Items] | |
| Fund Name | AB Short Duration High Yield ETF |
| Trading Symbol | SYFI |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about the AB Short Duration High Yield ETF (the “Fund”) for the period of October 1, 2023 to September 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.abfunds.com/link/AB/SYFI-A. You can also request this information by contacting us at (800) 227 4618. |
| Additional Information Phone Number | (800) 227 4618 |
| Additional Information Website | https://www.abfunds.com/link/AB/SYFI-A |
| Expenses [Text Block] | What were the Fund costs for the last year? (Based on a hypothetical $10,000 investment) Fund Name Cost of a $10,000 investment Costs paid as a percentage of a $10,000 investment AB Short Duration High Yield ETF $62 0.58% Prior to commencing operations, the Fund acquired the assets and liabilities of AB Short Duration High Yield Portfolio (a “Predecessor Fund”), a series of AB Bond Fund, Inc., and adopted the accounting and performance history of that fund (a “Reorganization”), as of the close of business on June 7, 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. |
| Expenses Paid, Amount | $ 62 |
| Expense Ratio, Percent | 0.58% |
| Factors Affecting Performance [Text Block] | How did the Fund perform last year? What affected the Fund’s performance? Over the 12-month period, the Fund underperformed the Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Total Return Index ("the Benchmark"), before sales charges. Yield-curve positioning in the US detracted the most from performance, relative to the benchmark, particularly from underweights to the six-month and two-year parts of the curve, which were partially offset by a gain from an overweight to the five-year part of the curve. Security selection also detracted, mainly from selections in consumer non-cyclicals, airlines, telecommunications, media and transportation services that outweighed gains from selections in energy and other consumer cyclicals. At the country allocation level, off-benchmark exposure to the eurozone and UK contributed. Currency decisions did not impact investment results during the period. |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years 10 Years AB Short Duration High Yield ETF 12.50 % 3.60 % 3.86 % Bloomberg U.S. Corporate Bond Index 14.28 % 1.16 % 2.93 % Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Total Return Index 13.94 % 5.16 % 4.88 % The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. Visit https://www.abfunds.com/link/AB/SYFI-A for the most recent performance information. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption or sale of Fund shares. |
| AssetsNet | $ 659,122,447 |
| Advisory Fees Paid, Amount | $ 3,119,392 |
| InvestmentCompanyPortfolioTurnover | 41% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics Net Assets $659,122,447 # of Portfolio Holdings 637 Portfolio Turnover Rate 41% Total Advisory Fees Paid $3,119,392 |
| Holdings [Text Block] | Portfolio Breakdown Value Value Corporates - Non-Investment Grade 80.3% Corporates - Investment Grade 9.4% Emerging Markets - Corporate Bonds 2.9% Bank Loans 1.4% Emerging Markets - Sovereigns 0.9% Collateralized Loan Obligations 0.5% Quasi-Sovereigns 0.4% Commercial Mortgage-Backed Securities 0.2% Short-Term Investments 2.8% Other assets less liabilities 1.2% Country Breakdown Value Value United States 71.3% United Kingdom 4.8% Canada 3.0% Germany 2.7% France 1.6% Spain 1.6% Italy 1.5% Luxembourg 1.1% Netherlands 1.0% Ireland 0.8% Hong Kong 0.7% Australia 0.5% Puerto Rico 0.5% Others 4.9% Short-Term Investments 2.8% Other assets less liabilities 1.2% |
| Material Fund Change [Text Block] |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||||
| Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014 | |
| C000247934 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | AB Short Duration High Yield ETF | ||||||||||
| Account Value | $ 14,636 | $ 12,915 | $ 11,752 | $ 13,376 | $ 12,327 | $ 12,241 | $ 11,558 | $ 11,256 | $ 10,741 | $ 10,021 | $ 10,000 |
| Alliance Bernstein Index:Bloomberg US Corporate Bond Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Corporate Bond Index | ||||||||||
| Account Value | $ 13,343 | 11,676 | 11,265 | 13,827 | 13,590 | 12,595 | 11,147 | 11,281 | 11,037 | 10,166 | 10,000 |
| Alliance Bernstein Index: Bloomberg US High Yield 1-5 Year Cash Pay 2% Total Return Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Total Return Index | ||||||||||
| Account Value | $ 16,098 | $ 14,129 | $ 12,829 | $ 14,039 | $ 12,571 | $ 12,518 | $ 12,077 | $ 11,538 | $ 10,643 | $ 9,620 | $ 10,000 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 120 Months Ended |
| Sep. 30, 2024 | Sep. 30, 2024 | Sep. 30, 2024 | |
| C000247934 | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | AB Short Duration High Yield ETF | ||
| Without Sales Load [Member] | C000247934 | |||
| Average Annual Return [Line Items] | |||
| Average Annual Return, Percent | 12.50% | 3.60% | 3.86% |
| Alliance Bernstein Index:Bloomberg US Corporate Bond Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg U.S. Corporate Bond Index | ||
| Average Annual Return, Percent | 14.28% | 1.16% | 2.93% |
| Alliance Bernstein Index: Bloomberg US High Yield 1-5 Year Cash Pay 2% Total Return Index | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg U.S. High Yield 1-5 Year Cash Pay 2% Total Return Index | ||
| Average Annual Return, Percent | 13.94% | 5.16% | 4.88% |
| Shareholder Report, Holdings (Details) - C000247934 | Sep. 30, 2024 |
| 10286748 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| 10286631 | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.20% |
| Country SummaryUnited States | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 71.30% |
| Country SummaryUnited Kingdom | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.80% |
| Country SummaryCanada | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3% |
| Country SummaryGermany | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| Country SummaryFrance | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Country SummarySpain | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.60% |
| Country SummaryItaly | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.50% |
| Country SummaryLuxembourg | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.10% |
| Country SummaryNetherlands | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1% |
| Country SummaryIreland | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.80% |
| Country SummaryHong Kong | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.70% |
| Country SummaryAustralia | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Country SummaryPuerto Rico | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| Country SummaryBrazil | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| Country Other Net Line | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.80% |
| AssetCorporates - Non-Investment Grade | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 80.30% |
| AssetCorporates - Investment Grade | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.40% |
| AssetEmerging Markets - Corporate Bonds | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| AssetBank Loans | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 1.40% |
| AssetEmerging Markets - Sovereigns | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.90% |
| AssetCollateralized Loan Obligations | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.50% |
| AssetQuasi-Sovereigns | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| AssetCommercial Mortgage-Backed Securities | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
