v3.26.1
S000016628 [Member] Expense Example - Western Asset Managed Municipals Fund
Feb. 28, 2026
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 447
Expense Example, with Redemption, 3 Years 600
Expense Example, with Redemption, 5 Years 766
Expense Example, with Redemption, 10 Years 1,247
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 230
Expense Example, with Redemption, 3 Years 405
Expense Example, with Redemption, 5 Years 701
Expense Example, with Redemption, 10 Years 1,392
Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 54
Expense Example, with Redemption, 3 Years 185
Expense Example, with Redemption, 5 Years 328
Expense Example, with Redemption, 10 Years 743
Class 1  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 61
Expense Example, with Redemption, 3 Years 192
Expense Example, with Redemption, 5 Years 335
Expense Example, with Redemption, 10 Years 750
Class FI  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 90
Expense Example, with Redemption, 3 Years 298
Expense Example, with Redemption, 5 Years 523
Expense Example, with Redemption, 10 Years 1,170
Class IS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 51
Expense Example, with Redemption, 3 Years 162
Expense Example, with Redemption, 5 Years 283
Expense Example, with Redemption, 10 Years $ 638