v3.25.4
S000028085 [Member] Expense Example - AB All Market Real Return Portfolio
Oct. 31, 2025
USD ($)
Class Z  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 93
Expense Example, with Redemption, 3 Years 297
Expense Example, with Redemption, 5 Years 517
Expense Example, with Redemption, 10 Years 1,152
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 542
Expense Example, with Redemption, 3 Years 798
Expense Example, with Redemption, 5 Years 1,073
Expense Example, with Redemption, 10 Years 1,858
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 300 [1]
Expense Example, with Redemption, 3 Years 625
Expense Example, with Redemption, 5 Years 1,075
Expense Example, with Redemption, 10 Years 2,129
Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 97
Expense Example, with Redemption, 3 Years 311
Expense Example, with Redemption, 5 Years 543
Expense Example, with Redemption, 10 Years 1,209
Class 1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 117
Expense Example, with Redemption, 3 Years 372
Expense Example, with Redemption, 5 Years 646
Expense Example, with Redemption, 10 Years $ 1,429
[1]
If you did not redeem your shares at the end of the period, your expenses would be decreased by approximately $100.