DWS RREEF Real Assets Fund Shareholder Fees - DWS RREEF Real Assets Fund	Mar. 31, 2025 USD ($)
Class A
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	5.75%
Maximum Deferred Sales Charge (as a percentage)	0.00%	[1]
Maximum Account Fee	$ 20
Class C
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 Account Fee	$ 20
Class R
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 Account Fee	$ 0
Class R6
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 Account Fee	$ 0
INST Class
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 Account Fee	$ 0
Class S
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 Account Fee	$ 20

[1] Investments of $250,000 or more may be eligible to buy Class A shares without a sales charge (load), but may be subject to a contingent deferred sales charge of 0.75% if redeemed within 12 months of the original purchase date and 0.50% if redeemed within the following six months.