v3.25.2
S000069099 [Member] Shareholder Fees - WESTERN ASSET SMASh SERIES CORE COMPLETION FUND - SMASh SERIES CORE COMPLETION 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%