v3.25.4
AB Intermediate Municipal Portfolios [Member] Annual Fund Operating Expenses - AB Intermediate Municipal Portfolios - Diversified Municipal Portfolio
Sep. 30, 2025
AB Intermediate Diversified Municipal Class A  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.37%
Distribution and Service (12b-1) Fees 0.25%
Component2 Other Expenses 0.03%
Component3 Other Expenses 0.02%
Other Expenses (as a percentage of Assets): 0.05%
Expenses (as a percentage of Assets) 0.67%
AB Intermediate Diversified Municipal Class C  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.37%
Distribution and Service (12b-1) Fees 1.00%
Component2 Other Expenses 0.03%
Component3 Other Expenses 0.02%
Other Expenses (as a percentage of Assets): 0.05%
Expenses (as a percentage of Assets) 1.42%
Advisor Class  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.37%
Distribution and Service (12b-1) Fees 0.00%
Component2 Other Expenses 0.03%
Component3 Other Expenses 0.02%
Other Expenses (as a percentage of Assets): 0.05%
Expenses (as a percentage of Assets) 0.42%
AB Intermediate Diversified Municipal Class Z  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.37%
Distribution and Service (12b-1) Fees 0.00%
Component2 Other Expenses 0.02%
Component3 Other Expenses 0.01%
Other Expenses (as a percentage of Assets): 0.03%
Expenses (as a percentage of Assets) 0.40%