v3.26.3
S000047073 [Member] Expense Example - AB Global Core Equity Portfolio
Jun. 30, 2026
USD ($)
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 283 [1]
Expense Example, with Redemption, 3 Years 566
Expense Example, with Redemption, 5 Years 975
Expense Example, with Redemption, 10 Years 1,916
Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 81
Expense Example, with Redemption, 3 Years 252
Expense Example, with Redemption, 5 Years 439
Expense Example, with Redemption, 10 Years 978
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 527
Expense Example, with Redemption, 3 Years 742
Expense Example, with Redemption, 5 Years 975
Expense Example, with Redemption, 10 Years $ 1,642
[1]
If you did not redeem your shares at the end of the period, your expenses would be decreased by approximately $100.