S000014681 [Member] Shareholder Fees - Western Asset SMASh Series M Fund - SMASh Series M Fund |
Feb. 28, 2025 |
|---|---|
| Prospectus [Line Items] | |
| Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) | 0.00% |
| Maximum Deferred Sales Charge (as a percentage) | 0.00% |