v3.25.4
S000027379 [Member] Expense Example - AB Municipal Bond Inflation Strategy
Oct. 31, 2025
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 375
Expense Example, with Redemption, 3 Years 554
Expense Example, with Redemption, 5 Years 749
Expense Example, with Redemption, 10 Years 1,309
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 254 [1]
Expense Example, with Redemption, 3 Years 496
Expense Example, with Redemption, 5 Years 862
Expense Example, with Redemption, 10 Years 1,691
Advisor Class  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 52
Expense Example, with Redemption, 3 Years 183
Expense Example, with Redemption, 5 Years 326
Expense Example, with Redemption, 10 Years 741
Class 1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 62
Expense Example, with Redemption, 3 Years 208
Expense Example, with Redemption, 5 Years 367
Expense Example, with Redemption, 10 Years 829
Class 2  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 52
Expense Example, with Redemption, 3 Years 177
Expense Example, with Redemption, 5 Years 312
Expense Example, with Redemption, 10 Years $ 708
[1]
If you did not redeem your shares at the end of the period, your expenses would be decreased by approximately $100.