v3.26.1
S000088373 [Member] Average Annual Total Returns
 12 Months Ended 13 Months Ended
Dec. 31, 2025
Dec. 31, 2025
MSCI EAFE Index (reflects no deduction for fees, expenses, or taxes)    
Prospectus [Line Items]    
Average Annual Return, Percent 31.22% 24.09% [1]
AB International Buffer ETF    
Prospectus [Line Items]    
Average Annual Return, Percent 16.35% 13.56% [1]
Performance Inception Date   Dec. 10, 2024
AB International Buffer ETF | After Taxes on Distributions    
Prospectus [Line Items]    
Average Annual Return, Percent [2] 16.35% 13.56% [1]
Performance Inception Date [2]   Dec. 10, 2024
AB International Buffer ETF | After Taxes on Distributions and Sales    
Prospectus [Line Items]    
Average Annual Return, Percent [2] 9.68% 10.34% [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.