v3.26.1
S000016633 [Member] Expense Example, No Redemption - Western Asset New York Municipals Fund
Mar. 31, 2026
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 459
Expense Example, No Redemption, 3 Years 637
Expense Example, No Redemption, 5 Years 829
Expense Example, No Redemption, 10 Years 1,385
Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 143
Expense Example, No Redemption, 3 Years 444
Expense Example, No Redemption, 5 Years 766
Expense Example, No Redemption, 10 Years 1,530
Class I  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 64
Expense Example, No Redemption, 3 Years 221
Expense Example, No Redemption, 5 Years 391
Expense Example, No Redemption, 10 Years 886
Class FI  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 95
Expense Example, No Redemption, 3 Years 329
Expense Example, No Redemption, 5 Years 582
Expense Example, No Redemption, 10 Years 1,305
Class IS  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 61
Expense Example, No Redemption, 3 Years 198
Expense Example, No Redemption, 5 Years 347
Expense Example, No Redemption, 10 Years $ 783