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First Trust Bloomberg Shareholder Yield ETF Average Annual Total Returns
 12 Months Ended 15 Months Ended 20 Months Ended 60 Months Ended 102 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Bloomberg Shareholder Yield Index (reflects no deduction for fees, expenses, or taxes)[Member]            
Prospectus [Line Items]            
Average Annual Return, Percent [1],[2]   7.80%    
S&P 500® Index (reflects no deduction for fees, expenses or taxes)[Member]            
Prospectus [Line Items]            
Average Annual Return, Percent   17.88% 17.16% 21.77% 14.42% 14.76%
First Trust Bloomberg Shareholder Yield ETF            
Prospectus [Line Items]            
Average Annual Return, Percent   7.11%     10.44% 10.91%
Performance Inception Date Jun. 20, 2017          
First Trust Bloomberg Shareholder Yield ETF | After Taxes on Distributions            
Prospectus [Line Items]            
Average Annual Return, Percent   6.36%     9.75% 10.19%
First Trust Bloomberg Shareholder Yield ETF | After Taxes on Distributions and Sales            
Prospectus [Line Items]            
Average Annual Return, Percent   4.21%     7.95% 8.54%
[1] On March 4, 2024, the Fund’s underlying index changed from the Nasdaq Riskalyze US Large CapTM Index to the Bloomberg Shareholder Yield Index. Therefore, any Fund performance and historical returns shown above that incorporate Fund performance prior to March 4, 2024, reflect performance of the Fund based on the Nasdaq Riskalyze US Large CapTM Index and are not necessarily indicative of the performance that the Fund, based on the Bloomberg Shareholder Yield Index, would have generated.
[2] Performance data is not available for all the periods shown in the table for the index because performance data does not exist for some of the entire periods.