Shareholder Report, Average Annual Return (Details) LMF5100_Western Asset Municipal High Income Fund_Class I_TSR Annual {Class I} |
12 Months Ended | 60 Months Ended | 120 Months Ended |
|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2026 |
Jul. 31, 2026 |
|
| Class I | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Class I | ||
| Average Annual Return, Percent | 7.42% | 0.92% | 2.42% |
| Bloomberg Municipal Bond Index [Member] | |||
| Average Annual Return [Line Items] | |||
| Line Graph and Table Measure Name | Bloomberg Municipal Bond Index | ||
| Average Annual Return, Percent | 5.27% | 0.51% | 1.95% |