v3.25.4
First Trust Managed Municipal Fund Annual Fund Operating Expenses - First Trust Managed Municipal Fund
Oct. 31, 2025
Prospectus [Line Items]  
Fee Waiver or Reimbursement over Assets, Date of Termination <span style="font-family:Arial;font-size:8.10pt;font-style:italic;">March 1, 2027</span>
A  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.50%
Distribution and Service (12b-1) Fees 0.25%
Other Expenses (as a percentage of Assets): 5.81%
Expenses (as a percentage of Assets) 6.56% [1]
Fee Waiver or Reimbursement (5.66%) [2]
Net Expenses (as a percentage of Assets) 0.90%
I  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.50%
Distribution and Service (12b-1) Fees
Other Expenses (as a percentage of Assets): 0.40%
Expenses (as a percentage of Assets) 0.90% [1]
Fee Waiver or Reimbursement (0.25%) [2]
Net Expenses (as a percentage of Assets) 0.65%
[1] Expenses have been restated to reflect the current fiscal year.
[2] The Fund’s investment advisor has agreed to waive fees and reimburse expenses through March 1, 2027 so that Total Annual Fund Operating Expenses (excluding taxes, interest, all brokerage commissions, other normal charges incident to the purchase and sale of portfolio securities, distribution and service fees payable pursuant to a Rule 12b-1 plan, if any, and extraordinary expenses) do not exceed 0.65% of the average daily net assets of any class of Fund shares. Fees waived or expenses borne by the Fund’s investment advisor are subject to reimbursement by the Fund for up to three years from the date the fee was waived or expense was incurred, but no reimbursement payment will be made by the Fund at any time if it would result in the Fund’s expenses exceeding any of (i) the applicable expense limitation in place for the most recent fiscal year for which such expense limitation was in place, (ii) the applicable expense limitation in place at the time the fees were waived, or (iii) the current expense limitation. Expense limitations may be terminated or modified prior to their expiration only with the approval of the Board of Trustees of the First Trust Series Fund.