Shareholder Report, Average Annual Return (Details) LMF2900_Western Asset Income Fund_Class A_TSR Annual {Class A} |
12 Months Ended | 60 Months Ended | 120 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2026 |
Jul. 31, 2026 |
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| Class A | ||||||||
| Average Annual Return [Line Items] | ||||||||
| Line Graph and Table Measure Name | Class A (with sales charge) | |||||||
| Average Annual Return, Percent | 0.63% | 1.27% | 2.93% | |||||
| Without Sales Load [Member] | Class A | ||||||||
| Average Annual Return [Line Items] | ||||||||
| Line Graph and Table Measure Name | Class A | |||||||
| Average Annual Return, Percent | 4.64% | 2.15% | 3.38% | |||||
| Bloomberg U.S. Aggregate Index [Member] | ||||||||
| Average Annual Return [Line Items] | ||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Aggregate Index | |||||||
| Average Annual Return, Percent | 2.71% | (0.40%) | 1.35% | |||||
| Bloomberg U.S. Universal Index [Member] | ||||||||
| Average Annual Return [Line Items] | ||||||||
| Line Graph and Table Measure Name | Bloomberg U.S. Universal Index | |||||||
| Average Annual Return, Percent | 3.02% | 0.00% | [1] | 1.74% | ||||
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