v3.26.1
First Trust Dow Jones Internet Index Fund Annual Fund Operating Expenses - First Trust Dow Jones Internet Index Fund
Dec. 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;">April 30, 2027</span>
First Trust Dow Jones Internet Index Fund  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.39% [1]
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.10%
Expenses (as a percentage of Assets) 0.49% [2]
Fee Waiver or Reimbursement 0.00% [3]
Net Expenses (as a percentage of Assets) 0.49%
[1] The management fee paid to First Trust Advisors L.P., the Fund’s investment advisor, may be reduced at certain levels of Fund net assets (“breakpoints”).The Fund's contractual management fee absent any breakpoints is 0.40%. See the Fund’s Statement of Additional Information for more information on the breakpoints.
[2] Expenses have been restated to reflect the current fiscal year.
[3] First Trust Advisors L.P., the Fund’s investment advisor, has agreed to waive fees and/or reimburse Fund expenses to the extent that the operating expenses of the Fund (excluding taxes, interest, all brokerage commissions, other normal charges incident to the purchase and sale of portfolio securities, and extraordinary expenses) exceed 0.60% of its average daily net assets (the “Expense Cap”) at least through April 30, 2027. The agreement may be terminated by the Trust, on behalf of the Fund, at any time and by the Fund’s investment advisor only after April 30, 2027 upon 60 days’ written notice.