v3.25.4
First Trust Short Duration High Income Fund Shareholder Fees - First Trust Short Duration High Income Fund
Oct. 31, 2025
C  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 3.50%
Maximum Deferred Sales Charge (as a percentage) 0.00% [1]
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00%
Exchange Fee (as a percentage of Amount Redeemed) 0.00%
I  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 1.00% [1]
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00%
Exchange Fee (as a percentage of Amount Redeemed) 0.00%
A  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00% [1]
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) 0.00%
Exchange Fee (as a percentage of Amount Redeemed) 0.00%
[1] For Class A shares purchased at net asset value without a sales charge because the purchase amount exceeded $250,000, a contingent deferred sales charge of 1% may be imposed on any redemption within 12 months of purchase. The contingent deferred sales charge on Class C shares applies only to redemptions within 12 months of purchase.