v3.26.3
S000045541 [Member] Expense Example - AB International Growth Portfolio
Jun. 30, 2026
USD ($)
Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 92
Expense Example, with Redemption, 3 Years 373
Expense Example, with Redemption, 5 Years 675
Expense Example, with Redemption, 10 Years 1,533
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 537
Expense Example, with Redemption, 3 Years 862
Expense Example, with Redemption, 5 Years 1,210
Expense Example, with Redemption, 10 Years 2,189
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 293 [1]
Expense Example, with Redemption, 3 Years 674
Expense Example, with Redemption, 5 Years 1,181
Expense Example, with Redemption, 10 Years $ 2,403
[1]
If you did not redeem your shares at the end of the period, your expenses would be decreased by approximately $100.