v3.26.1
Expense Example - Western Asset Oregon Municipals Fund
Apr. 30, 2026
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 449
Expense Example, with Redemption, 3 Years 679
Expense Example, with Redemption, 5 Years 926
Expense Example, with Redemption, 10 Years 1,635
Class C  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 232
Expense Example, with Redemption, 3 Years 494
Expense Example, with Redemption, 5 Years 880
Expense Example, with Redemption, 10 Years 1,808
Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 56
Expense Example, with Redemption, 3 Years 271
Expense Example, with Redemption, 5 Years 504
Expense Example, with Redemption, 10 Years 1,172
Class FI  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 87
Expense Example, with Redemption, 3 Years 372
Expense Example, with Redemption, 5 Years 679
Expense Example, with Redemption, 10 Years 1,550
Class IS  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 53
Expense Example, with Redemption, 3 Years 243
Expense Example, with Redemption, 5 Years 449
Expense Example, with Redemption, 10 Years $ 1,041