v3.26.1
S000088374 [Member] Average Annual Total Returns
 12 Months Ended 13 Months Ended
Dec. 31, 2025
Dec. 31, 2025
S&P 500 Index (reflects no deduction for fees, expenses, or taxes)    
Prospectus [Line Items]    
Average Annual Return, Percent 17.88% 13.74% [1]
AB Moderate Buffer ETF    
Prospectus [Line Items]    
Average Annual Return, Percent 12.79% 10.87% [1]
Performance Inception Date   Dec. 10, 2024
AB Moderate Buffer ETF | After Taxes on Distributions    
Prospectus [Line Items]    
Average Annual Return, Percent [2] 12.79% 10.87% [1]
Performance Inception Date [2]   Dec. 10, 2024
AB Moderate Buffer ETF | After Taxes on Distributions and Sales    
Prospectus [Line Items]    
Average Annual Return, Percent [2] 7.57% 8.29% [1]
Performance Inception Date [2]   Dec. 10, 2024
[1]
Inception date is 12/10/2024.
[2] 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 Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.