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First Trust Indxx Aerospace and Defense ETF Annual Total Returns
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
First Trust Indxx Aerospace and Defense ETF | First Trust Indxx Aerospace and Defense ETF      
Prospectus [Line Items]      
Annual Return [Percent] 41.24% 20.44% 14.88%