This semi-annual shareholder report contains important information about DWS RREEF Real Assets Fund (the "Fund") for the period April 1, 2025 to September 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund on the Fund's website at dws.com/mutualreports. You can also request this information by contacting us at (800) 728-3337.

Additional Information Phone Number

(800) 728-3337

Additional Information Website

<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 14.6667px; font-weight: 300; grid-area: auto; line-height: 17.6px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">dws.com/mutualreports</span>

Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Fund	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$61	1.19%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Gross expense ratio as of the latest prospectus: 1.28%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount

$ 61

Expense Ratio, Percent

1.19%

^[1]

AssetsNet

$ 4,339,117,172

Holdings Count | Holding

158

Advisory Fees Paid, Amount

$ 16,254,723

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)	4,339,117,172
Number of Portfolio Holdings	158
Portfolio Turnover Rate (%)	39
Total Net Advisory Fees Paid ($)	16,254,723

Holdings [Text Block]

What did the Fund invest in?

Asset Allocation

Asset Type		% of Net Assets
Common Stocks		Asset
Infrastructure		35%
Real Estate		25%
Natural Resource Equities		16%
Commodity Futures		14%
Treasury Inflation Protected Securities		10%
Cash Equivalents, U.S. Treasury Notes, Short-Term U.S. Treasury Obligations and Other Assets and Liabilities, net^{Footnote Reference*}		0%
Total		100%

Footnote	Description
Footnote^*	Net of notional exposure to futures contracts.

Sector Allocation

Sector	% of Net Assets
Real Estate	29%
Energy	14%
Utilities	13%
Materials	9%
Industrials	7%
Communication Services	2%
Consumer Staples	1%
Health Care	0%

Geographical Diversification

Country	% of Net Assets
United States	60%
Canada	10%
United Kingdom	6%
Japan	4%
Spain	3%
Australia	2%
France	2%
Hong Kong	2%
Singapore	1%
China	1%
Other	7%

Ten Largest Equity Holdings

Holdings	17.2% of Net Assets
American Tower Corp. (United States)	3.0%
Williams Cos., Inc. (United States)	2.3%
Enbridge, Inc. (Canada)	2.3%
National Grid PLC (United Kingdom)	1.7%
Equinix, Inc. (United States)	1.5%
Exelon Corp. (United States)	1.3%
NiSource, Inc. (United States)	1.3%
Simon Property Group, Inc. (United States)	1.3%
Vinci SA (France)	1.3%
Shell PLC (United Kingdom)	1.2%

C000099689

Shareholder Report [Line Items]

Fund Name

DWS RREEF Real Assets Fund

Class Name

Class C

Trading Symbol

AAAPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about DWS RREEF Real Assets Fund (the "Fund") for the period April 1, 2025 to September 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund on the Fund's website at dws.com/mutualreports. You can also request this information by contacting us at (800) 728-3337.

Additional Information Phone Number

(800) 728-3337

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Fund	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$100	1.94%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Gross expense ratio as of the latest prospectus: 2.01%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount

$ 100

Expense Ratio, Percent

1.94%

^[2]

AssetsNet

$ 4,339,117,172

Holdings Count | Holding

158

Advisory Fees Paid, Amount

$ 16,254,723

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)	4,339,117,172
Number of Portfolio Holdings	158
Portfolio Turnover Rate (%)	39
Total Net Advisory Fees Paid ($)	16,254,723

Holdings [Text Block]

What did the Fund invest in?

Asset Allocation

Asset Type		% of Net Assets
Common Stocks		Asset
Infrastructure		35%
Real Estate		25%
Natural Resource Equities		16%
Commodity Futures		14%
Treasury Inflation Protected Securities		10%
Cash Equivalents, U.S. Treasury Notes, Short-Term U.S. Treasury Obligations and Other Assets and Liabilities, net^{Footnote Reference*}		0%
Total		100%

Footnote	Description
Footnote^*	Net of notional exposure to futures contracts.

Sector Allocation

Sector	% of Net Assets
Real Estate	29%
Energy	14%
Utilities	13%
Materials	9%
Industrials	7%
Communication Services	2%
Consumer Staples	1%
Health Care	0%

Geographical Diversification

Country	% of Net Assets
United States	60%
Canada	10%
United Kingdom	6%
Japan	4%
Spain	3%
Australia	2%
France	2%
Hong Kong	2%
Singapore	1%
China	1%
Other	7%

Ten Largest Equity Holdings

Holdings	17.2% of Net Assets
American Tower Corp. (United States)	3.0%
Williams Cos., Inc. (United States)	2.3%
Enbridge, Inc. (Canada)	2.3%
National Grid PLC (United Kingdom)	1.7%
Equinix, Inc. (United States)	1.5%
Exelon Corp. (United States)	1.3%
NiSource, Inc. (United States)	1.3%
Simon Property Group, Inc. (United States)	1.3%
Vinci SA (France)	1.3%
Shell PLC (United Kingdom)	1.2%

C000101767

Shareholder Report [Line Items]

Fund Name

DWS RREEF Real Assets Fund

Class Name

Class R

Trading Symbol

AAAQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about DWS RREEF Real Assets Fund (the "Fund") for the period April 1, 2025 to September 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund on the Fund's website at dws.com/mutualreports. You can also request this information by contacting us at (800) 728-3337.

Additional Information Phone Number

(800) 728-3337

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Fund	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R	$74	1.44%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Gross expense ratio as of the latest prospectus: 1.66%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount

$ 74

Expense Ratio, Percent

1.44%

^[3]

AssetsNet

$ 4,339,117,172

Holdings Count | Holding

158

Advisory Fees Paid, Amount

$ 16,254,723

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)	4,339,117,172
Number of Portfolio Holdings	158
Portfolio Turnover Rate (%)	39
Total Net Advisory Fees Paid ($)	16,254,723

Holdings [Text Block]

What did the Fund invest in?

Asset Allocation

Asset Type		% of Net Assets
Common Stocks		Asset
Infrastructure		35%
Real Estate		25%
Natural Resource Equities		16%
Commodity Futures		14%
Treasury Inflation Protected Securities		10%
Cash Equivalents, U.S. Treasury Notes, Short-Term U.S. Treasury Obligations and Other Assets and Liabilities, net^{Footnote Reference*}		0%
Total		100%

Footnote	Description
Footnote^*	Net of notional exposure to futures contracts.

Sector Allocation

Sector	% of Net Assets
Real Estate	29%
Energy	14%
Utilities	13%
Materials	9%
Industrials	7%
Communication Services	2%
Consumer Staples	1%
Health Care	0%

Geographical Diversification

Country	% of Net Assets
United States	60%
Canada	10%
United Kingdom	6%
Japan	4%
Spain	3%
Australia	2%
France	2%
Hong Kong	2%
Singapore	1%
China	1%
Other	7%

Ten Largest Equity Holdings

Holdings	17.2% of Net Assets
American Tower Corp. (United States)	3.0%
Williams Cos., Inc. (United States)	2.3%
Enbridge, Inc. (Canada)	2.3%
National Grid PLC (United Kingdom)	1.7%
Equinix, Inc. (United States)	1.5%
Exelon Corp. (United States)	1.3%
NiSource, Inc. (United States)	1.3%
Simon Property Group, Inc. (United States)	1.3%
Vinci SA (France)	1.3%
Shell PLC (United Kingdom)	1.2%

C000151995

Shareholder Report [Line Items]

Fund Name

DWS RREEF Real Assets Fund

Class Name

Class R6

Trading Symbol

AAAVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about DWS RREEF Real Assets Fund (the "Fund") for the period April 1, 2025 to September 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund on the Fund's website at dws.com/mutualreports. You can also request this information by contacting us at (800) 728-3337.

Additional Information Phone Number

(800) 728-3337

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Fund	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$46	0.90%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Gross expense ratio as of the latest prospectus: 0.90%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.90%

^[4]

AssetsNet

$ 4,339,117,172

Holdings Count | Holding

158

Advisory Fees Paid, Amount

$ 16,254,723

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)	4,339,117,172
Number of Portfolio Holdings	158
Portfolio Turnover Rate (%)	39
Total Net Advisory Fees Paid ($)	16,254,723

Holdings [Text Block]

What did the Fund invest in?

Asset Allocation

Asset Type		% of Net Assets
Common Stocks		Asset
Infrastructure		35%
Real Estate		25%
Natural Resource Equities		16%
Commodity Futures		14%
Treasury Inflation Protected Securities		10%
Cash Equivalents, U.S. Treasury Notes, Short-Term U.S. Treasury Obligations and Other Assets and Liabilities, net^{Footnote Reference*}		0%
Total		100%

Footnote	Description
Footnote^*	Net of notional exposure to futures contracts.

Sector Allocation

Sector	% of Net Assets
Real Estate	29%
Energy	14%
Utilities	13%
Materials	9%
Industrials	7%
Communication Services	2%
Consumer Staples	1%
Health Care	0%

Geographical Diversification

Country	% of Net Assets
United States	60%
Canada	10%
United Kingdom	6%
Japan	4%
Spain	3%
Australia	2%
France	2%
Hong Kong	2%
Singapore	1%
China	1%
Other	7%

Ten Largest Equity Holdings

Holdings	17.2% of Net Assets
American Tower Corp. (United States)	3.0%
Williams Cos., Inc. (United States)	2.3%
Enbridge, Inc. (Canada)	2.3%
National Grid PLC (United Kingdom)	1.7%
Equinix, Inc. (United States)	1.5%
Exelon Corp. (United States)	1.3%
NiSource, Inc. (United States)	1.3%
Simon Property Group, Inc. (United States)	1.3%
Vinci SA (France)	1.3%
Shell PLC (United Kingdom)	1.2%

C000099690

Shareholder Report [Line Items]

Fund Name

DWS RREEF Real Assets Fund

Class Name

Class S

Trading Symbol

AAASX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about DWS RREEF Real Assets Fund (the "Fund") for the period April 1, 2025 to September 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund on the Fund's website at dws.com/mutualreports. You can also request this information by contacting us at (800) 728-3337.

Additional Information Phone Number

(800) 728-3337

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Fund	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class S	$54	1.05%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Gross expense ratio as of the latest prospectus: 1.05%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount

$ 54

Expense Ratio, Percent

1.05%

^[5]

AssetsNet

$ 4,339,117,172

Holdings Count | Holding

158

Advisory Fees Paid, Amount

$ 16,254,723

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)	4,339,117,172
Number of Portfolio Holdings	158
Portfolio Turnover Rate (%)	39
Total Net Advisory Fees Paid ($)	16,254,723

Holdings [Text Block]

What did the Fund invest in?

Asset Allocation

Asset Type		% of Net Assets
Common Stocks		Asset
Infrastructure		35%
Real Estate		25%
Natural Resource Equities		16%
Commodity Futures		14%
Treasury Inflation Protected Securities		10%
Cash Equivalents, U.S. Treasury Notes, Short-Term U.S. Treasury Obligations and Other Assets and Liabilities, net^{Footnote Reference*}		0%
Total		100%

Footnote	Description
Footnote^*	Net of notional exposure to futures contracts.

Sector Allocation

Sector	% of Net Assets
Real Estate	29%
Energy	14%
Utilities	13%
Materials	9%
Industrials	7%
Communication Services	2%
Consumer Staples	1%
Health Care	0%

Geographical Diversification

Country	% of Net Assets
United States	60%
Canada	10%
United Kingdom	6%
Japan	4%
Spain	3%
Australia	2%
France	2%
Hong Kong	2%
Singapore	1%
China	1%
Other	7%

Ten Largest Equity Holdings

Holdings	17.2% of Net Assets
American Tower Corp. (United States)	3.0%
Williams Cos., Inc. (United States)	2.3%
Enbridge, Inc. (Canada)	2.3%
National Grid PLC (United Kingdom)	1.7%
Equinix, Inc. (United States)	1.5%
Exelon Corp. (United States)	1.3%
NiSource, Inc. (United States)	1.3%
Simon Property Group, Inc. (United States)	1.3%
Vinci SA (France)	1.3%
Shell PLC (United Kingdom)	1.2%

C000099691

Shareholder Report [Line Items]

Fund Name

DWS RREEF Real Assets Fund

Class Name

Institutional Class

Trading Symbol

AAAZX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about DWS RREEF Real Assets Fund (the "Fund") for the period April 1, 2025 to September 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund on the Fund's website at dws.com/mutualreports. You can also request this information by contacting us at (800) 728-3337.

Additional Information Phone Number

(800) 728-3337

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(Based on a hypothetical $10,000 investment)

Fund	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Institutional Class	$46	0.90%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Gross expense ratio as of the latest prospectus: 1.00%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.90%

^[6]

AssetsNet

$ 4,339,117,172

Holdings Count | Holding

158

Advisory Fees Paid, Amount

$ 16,254,723

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)	4,339,117,172
Number of Portfolio Holdings	158
Portfolio Turnover Rate (%)	39
Total Net Advisory Fees Paid ($)	16,254,723

Holdings [Text Block]

What did the Fund invest in?

Asset Allocation

Asset Type		% of Net Assets
Common Stocks		Asset
Infrastructure		35%
Real Estate		25%
Natural Resource Equities		16%
Commodity Futures		14%
Treasury Inflation Protected Securities		10%
Cash Equivalents, U.S. Treasury Notes, Short-Term U.S. Treasury Obligations and Other Assets and Liabilities, net^{Footnote Reference*}		0%
Total		100%

Footnote	Description
Footnote^*	Net of notional exposure to futures contracts.

Sector Allocation

Sector	% of Net Assets
Real Estate	29%
Energy	14%
Utilities	13%
Materials	9%
Industrials	7%
Communication Services	2%
Consumer Staples	1%
Health Care	0%

Geographical Diversification

Country	% of Net Assets
United States	60%
Canada	10%
United Kingdom	6%
Japan	4%
Spain	3%
Australia	2%
France	2%
Hong Kong	2%
Singapore	1%
China	1%
Other	7%

Ten Largest Equity Holdings

Holdings	17.2% of Net Assets
American Tower Corp. (United States)	3.0%
Williams Cos., Inc. (United States)	2.3%
Enbridge, Inc. (Canada)	2.3%
National Grid PLC (United Kingdom)	1.7%
Equinix, Inc. (United States)	1.5%
Exelon Corp. (United States)	1.3%
NiSource, Inc. (United States)	1.3%
Simon Property Group, Inc. (United States)	1.3%
Vinci SA (France)	1.3%
Shell PLC (United Kingdom)	1.2%

[1]	Annualized.
[2]	Annualized.
[3]	Annualized.
[4]	Annualized.
[5]	Annualized.
[6]	Annualized.