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First Trust Horizon Managed Volatility Small Mid ETF Annual Total Returns
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
First Trust Horizon Managed Volatility Small Mid ETF | First Trust Horizon Managed Volatility Small/Mid ETF        
Prospectus [Line Items]        
Annual Return [Percent] 13.34% 4.99% (9.37%) 23.59%