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First Trust Indxx Medical Devices ETF Annual Total Returns
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
First Trust Indxx Medical Devices ETF | First Trust Indxx Medical Devices ETF        
Prospectus [Line Items]        
Annual Return [Percent] 2.04% 2.23% 7.17% (28.36%)