v3.25.2
Shareholder Report
 6 Months Ended
Jun. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name DEUTSCHE DWS SECURITIES TRUST
Entity Central Index Key 0000088048
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2025
C000099785  
Shareholder Report [Line Items]  
Fund Name DWS RREEF Real Estate Securities Fund
Class Name Class A
Trading Symbol RRRAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about DWS RREEF Real Estate Securities Fund (the "Fund") for the period January 1, 2025 to June 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
$51
1.03%Footnote Reference(a)
FootnoteDescription
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 $ 51
Expense Ratio, Percent 1.03% [1]
AssetsNet $ 1,037,841,941
Holdings Count | Holding 33
Advisory Fees Paid, Amount $ 2,080,444
InvestmentCompanyPortfolioTurnover 48.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)
1,037,841,941
Number of Portfolio Holdings
33
Portfolio Turnover Rate (%)
48
Total Net Advisory Fees Paid ($)
2,080,444
Holdings [Text Block]

Asset Allocation

Asset Type
% of Net Assets
Common Stocks
99%
Cash Equivalents
1%
Other Assets and Liabilities, Net
0%
Total
100%

Sector Allocation

Sector
% of Net Assets
Specialized REITs
42%
Residential REITs
17%
Health Care REITs
14%
Retail REITs
12%
Industrial REITs
11%
Diversified REITs
3%
Office REITs
1%

Ten Largest Equity Holdings

Holdings
56.7% of Net Assets
American Tower Corp.
10.5%
Prologis, Inc.
6.9%
Welltower, Inc.
6.9%
Equinix, Inc.
6.4%
Public Storage
5.2%
Iron Mountain, Inc.
5.0%
Digital Realty Trust, Inc.
4.4%
Simon Property Group, Inc.
4.1%
Mid-America Apartment Communities, Inc.
3.7%
Agree Realty Corp.
3.6%
C000099787  
Shareholder Report [Line Items]  
Fund Name DWS RREEF Real Estate Securities Fund
Class Name Class C
Trading Symbol RRRCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about DWS RREEF Real Estate Securities Fund (the "Fund") for the period January 1, 2025 to June 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 C
$87
1.75%Footnote Reference(a)
FootnoteDescription
Footnote(a)
Annualized.

 

Gross expense ratio as of the latest prospectus: 1.73%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount $ 87
Expense Ratio, Percent 1.75% [2]
AssetsNet $ 1,037,841,941
Holdings Count | Holding 33
Advisory Fees Paid, Amount $ 2,080,444
InvestmentCompanyPortfolioTurnover 48.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)
1,037,841,941
Number of Portfolio Holdings
33
Portfolio Turnover Rate (%)
48
Total Net Advisory Fees Paid ($)
2,080,444
Holdings [Text Block]

Asset Allocation

Asset Type
% of Net Assets
Common Stocks
99%
Cash Equivalents
1%
Other Assets and Liabilities, Net
0%
Total
100%

Sector Allocation

Sector
% of Net Assets
Specialized REITs
42%
Residential REITs
17%
Health Care REITs
14%
Retail REITs
12%
Industrial REITs
11%
Diversified REITs
3%
Office REITs
1%

Ten Largest Equity Holdings

Holdings
56.7% of Net Assets
American Tower Corp.
10.5%
Prologis, Inc.
6.9%
Welltower, Inc.
6.9%
Equinix, Inc.
6.4%
Public Storage
5.2%
Iron Mountain, Inc.
5.0%
Digital Realty Trust, Inc.
4.4%
Simon Property Group, Inc.
4.1%
Mid-America Apartment Communities, Inc.
3.7%
Agree Realty Corp.
3.6%
C000099788  
Shareholder Report [Line Items]  
Fund Name DWS RREEF Real Estate Securities Fund
Class Name Class R
Trading Symbol RRRSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about DWS RREEF Real Estate Securities Fund (the "Fund") for the period January 1, 2025 to June 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 R
$65
1.31%Footnote Reference(a)
FootnoteDescription
Footnote(a)
Annualized.

 

Gross expense ratio as of the latest prospectus: 1.30%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount $ 65
Expense Ratio, Percent 1.31% [3]
AssetsNet $ 1,037,841,941
Holdings Count | Holding 33
Advisory Fees Paid, Amount $ 2,080,444
InvestmentCompanyPortfolioTurnover 48.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)
1,037,841,941
Number of Portfolio Holdings
33
Portfolio Turnover Rate (%)
48
Total Net Advisory Fees Paid ($)
2,080,444
Holdings [Text Block]

Asset Allocation

Asset Type
% of Net Assets
Common Stocks
99%
Cash Equivalents
1%
Other Assets and Liabilities, Net
0%
Total
100%

Sector Allocation

Sector
% of Net Assets
Specialized REITs
42%
Residential REITs
17%
Health Care REITs
14%
Retail REITs
12%
Industrial REITs
11%
Diversified REITs
3%
Office REITs
1%

Ten Largest Equity Holdings

Holdings
56.7% of Net Assets
American Tower Corp.
10.5%
Prologis, Inc.
6.9%
Welltower, Inc.
6.9%
Equinix, Inc.
6.4%
Public Storage
5.2%
Iron Mountain, Inc.
5.0%
Digital Realty Trust, Inc.
4.4%
Simon Property Group, Inc.
4.1%
Mid-America Apartment Communities, Inc.
3.7%
Agree Realty Corp.
3.6%
C000148175  
Shareholder Report [Line Items]  
Fund Name DWS RREEF Real Estate Securities Fund
Class Name Class R6
Trading Symbol RRRZX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about DWS RREEF Real Estate Securities Fund (the "Fund") for the period January 1, 2025 to June 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 R6
$27
0.54%Footnote Reference(a)
FootnoteDescription
Footnote(a)
Annualized.

 

Gross expense ratio as of the latest prospectus: 0.54%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.54% [4]
AssetsNet $ 1,037,841,941
Holdings Count | Holding 33
Advisory Fees Paid, Amount $ 2,080,444
InvestmentCompanyPortfolioTurnover 48.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)
1,037,841,941
Number of Portfolio Holdings
33
Portfolio Turnover Rate (%)
48
Total Net Advisory Fees Paid ($)
2,080,444
Holdings [Text Block]

Asset Allocation

Asset Type
% of Net Assets
Common Stocks
99%
Cash Equivalents
1%
Other Assets and Liabilities, Net
0%
Total
100%

Sector Allocation

Sector
% of Net Assets
Specialized REITs
42%
Residential REITs
17%
Health Care REITs
14%
Retail REITs
12%
Industrial REITs
11%
Diversified REITs
3%
Office REITs
1%

Ten Largest Equity Holdings

Holdings
56.7% of Net Assets
American Tower Corp.
10.5%
Prologis, Inc.
6.9%
Welltower, Inc.
6.9%
Equinix, Inc.
6.4%
Public Storage
5.2%
Iron Mountain, Inc.
5.0%
Digital Realty Trust, Inc.
4.4%
Simon Property Group, Inc.
4.1%
Mid-America Apartment Communities, Inc.
3.7%
Agree Realty Corp.
3.6%
C000099789  
Shareholder Report [Line Items]  
Fund Name DWS RREEF Real Estate Securities Fund
Class Name Class S
Trading Symbol RRREX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about DWS RREEF Real Estate Securities Fund (the "Fund") for the period January 1, 2025 to June 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 S
$39
0.78%Footnote Reference(a)
FootnoteDescription
Footnote(a)
Annualized.

 

Gross expense ratio as of the latest prospectus: 0.76%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.78% [5]
AssetsNet $ 1,037,841,941
Holdings Count | Holding 33
Advisory Fees Paid, Amount $ 2,080,444
InvestmentCompanyPortfolioTurnover 48.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)
1,037,841,941
Number of Portfolio Holdings
33
Portfolio Turnover Rate (%)
48
Total Net Advisory Fees Paid ($)
2,080,444
Holdings [Text Block]

Asset Allocation

Asset Type
% of Net Assets
Common Stocks
99%
Cash Equivalents
1%
Other Assets and Liabilities, Net
0%
Total
100%

Sector Allocation

Sector
% of Net Assets
Specialized REITs
42%
Residential REITs
17%
Health Care REITs
14%
Retail REITs
12%
Industrial REITs
11%
Diversified REITs
3%
Office REITs
1%

Ten Largest Equity Holdings

Holdings
56.7% of Net Assets
American Tower Corp.
10.5%
Prologis, Inc.
6.9%
Welltower, Inc.
6.9%
Equinix, Inc.
6.4%
Public Storage
5.2%
Iron Mountain, Inc.
5.0%
Digital Realty Trust, Inc.
4.4%
Simon Property Group, Inc.
4.1%
Mid-America Apartment Communities, Inc.
3.7%
Agree Realty Corp.
3.6%
C000099790  
Shareholder Report [Line Items]  
Fund Name DWS RREEF Real Estate Securities Fund
Class Name Institutional Class
Trading Symbol RRRRX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about DWS RREEF Real Estate Securities Fund (the "Fund") for the period January 1, 2025 to June 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
Institutional Class
$32
0.64%Footnote Reference(a)
FootnoteDescription
Footnote(a)
Annualized.

 

Gross expense ratio as of the latest prospectus: 0.63%. See prospectus for any contractual or voluntary waivers; without a waiver, costs would have been higher.

Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.64% [6]
AssetsNet $ 1,037,841,941
Holdings Count | Holding 33
Advisory Fees Paid, Amount $ 2,080,444
InvestmentCompanyPortfolioTurnover 48.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Net Assets ($)
1,037,841,941
Number of Portfolio Holdings
33
Portfolio Turnover Rate (%)
48
Total Net Advisory Fees Paid ($)
2,080,444
Holdings [Text Block]

Asset Allocation

Asset Type
% of Net Assets
Common Stocks
99%
Cash Equivalents
1%
Other Assets and Liabilities, Net
0%
Total
100%

Sector Allocation

Sector
% of Net Assets
Specialized REITs
42%
Residential REITs
17%
Health Care REITs
14%
Retail REITs
12%
Industrial REITs
11%
Diversified REITs
3%
Office REITs
1%

Ten Largest Equity Holdings

Holdings
56.7% of Net Assets
American Tower Corp.
10.5%
Prologis, Inc.
6.9%
Welltower, Inc.
6.9%
Equinix, Inc.
6.4%
Public Storage
5.2%
Iron Mountain, Inc.
5.0%
Digital Realty Trust, Inc.
4.4%
Simon Property Group, Inc.
4.1%
Mid-America Apartment Communities, Inc.
3.7%
Agree Realty Corp.
3.6%
[1] Annualized.
[2] Annualized.
[3] Annualized.
[4] Annualized.
[5] Annualized.
[6] Annualized.