v3.25.4
AB Intermediate Municipal Portfolios [Member] Shareholder Fees - AB Intermediate Municipal Portfolios - Diversified Municipal Portfolio
Sep. 30, 2025
AB Intermediate Diversified Municipal Class A  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.00%
Maximum Deferred Sales Charge (as a percentage) 0.00% [1]
AB Intermediate Diversified Municipal Class C  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 1.00% [2]
Advisor Class  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00%
AB Intermediate Diversified Municipal Class Z  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00%
[1]
Purchases of Class A shares in amounts of $1,000,000 or more, or by certain group retirement plans, may be subject to a 1%, 1‑year contingent deferred sales charge (“CDSC”), which may be subject to waiver in certain circumstances.
[2]
For Class C shares, the CDSC is 0% after the first year. Class C shares automatically convert to Class A shares after eight years.