v3.26.1
DWS RREEF Real Estate Securities Fund Expense Example, No Redemption - DWS RREEF Real Estate Securities Fund
Apr. 29, 2026
USD ($)
Class A  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year $ 670
Expense Example, No Redemption, 3 Years 872
Expense Example, No Redemption, 5 Years 1,091
Expense Example, No Redemption, 10 Years 1,718
Class C  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 174
Expense Example, No Redemption, 3 Years 539
Expense Example, No Redemption, 5 Years 928
Expense Example, No Redemption, 10 Years 1,829
Class R  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 132
Expense Example, No Redemption, 3 Years 412
Expense Example, No Redemption, 5 Years 713
Expense Example, No Redemption, 10 Years 1,568
Class R6  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 55
Expense Example, No Redemption, 3 Years 173
Expense Example, No Redemption, 5 Years 302
Expense Example, No Redemption, 10 Years 677
INST Class  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 64
Expense Example, No Redemption, 3 Years 202
Expense Example, No Redemption, 5 Years 351
Expense Example, No Redemption, 10 Years 786
Class S  
Prospectus [Line Items]  
Expense Example, No Redemption, 1 Year 78
Expense Example, No Redemption, 3 Years 243
Expense Example, No Redemption, 5 Years 422
Expense Example, No Redemption, 10 Years $ 942