v3.26.1
S000057700 [Member] Average Annual Total Returns
12 Months Ended 60 Months Ended 103 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000 Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 17.15% 13.15% 14.22%
Russell 1000 Growth Index (reflects no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 18.56% 15.32% 18.70%
ClearBridge Large Cap Growth Select ETF      
Prospectus [Line Items]      
Average Annual Return, Percent 9.51% 11.28% 15.66%
Performance Inception Date     May 22, 2017
ClearBridge Large Cap Growth Select ETF | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent 9.45% 11.09% 15.42%
Performance Inception Date     May 22, 2017
ClearBridge Large Cap Growth Select ETF | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 5.63% 8.93% 13.07%
Performance Inception Date     May 22, 2017