v3.26.1
DWS Equity 500 Index Fund Annual Fund Operating Expenses - DWS Equity 500 Index Fund
Apr. 28, 2026
Prospectus [Line Items]  
Fee Waiver or Reimbursement over Assets, Date of Termination <span style="font-family:Arial;font-size:10pt;">April 30, </span><span style="font-family:Arial;font-size:10pt;">2027</span>
Class R6  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.05%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.18%
Expenses (as a percentage of Assets) 0.23% [1]
Fee Waiver or Reimbursement (0.03%)
Net Expenses (as a percentage of Assets) 0.20%
INST Class  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.05%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.24%
Expenses (as a percentage of Assets) 0.29% [1]
Fee Waiver or Reimbursement (0.09%)
Net Expenses (as a percentage of Assets) 0.20%
Class S  
Prospectus [Line Items]  
Management Fees (as a percentage of Assets) 0.05%
Distribution and Service (12b-1) Fees 0.00%
Other Expenses (as a percentage of Assets): 0.27%
Expenses (as a percentage of Assets) 0.32% [1]
Fee Waiver or Reimbursement (0.07%)
Net Expenses (as a percentage of Assets) 0.25%
[1] The table and Example below reflect the expenses of both the fund and the Portfolio.