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S000016637 [Member] Investment Objectives and Goals - Western Asset Pennsylvania Municipals Fund
Mar. 31, 2026
Prospectus [Line Items]  
Risk/Return [Heading] WESTERN ASSET PENNSYLVANIA MUNICIPALS FUND
Objective [Heading] Investment objective
Objective, Primary [Text Block]
The fund seeks as high a level of income exempt from regular federal income tax and Pennsylvania personal income taxes as is consistent with prudent investing.