v3.26.1
S000016632 [Member] Expense Example, No Redemption - Western Asset New Jersey Municipals Fund
Mar. 31, 2026
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 455
Expense Example, No Redemption, 3 Years 624
Expense Example, No Redemption, 5 Years 808
Expense Example, No Redemption, 10 Years 1,340
Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 138
Expense Example, No Redemption, 3 Years 431
Expense Example, No Redemption, 5 Years 745
Expense Example, No Redemption, 10 Years 1,486
Class I  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 56
Expense Example, No Redemption, 3 Years 205
Expense Example, No Redemption, 5 Years 366
Expense Example, No Redemption, 10 Years 836
Class FI  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 87
Expense Example, No Redemption, 3 Years 310
Expense Example, No Redemption, 5 Years 551
Expense Example, No Redemption, 10 Years 1,243
Class IS  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 53
Expense Example, No Redemption, 3 Years 180
Expense Example, No Redemption, 5 Years 319
Expense Example, No Redemption, 10 Years $ 722