Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	DEUTSCHE DWS SECURITIES TRUST
Prospectus Date	rr_ProspectusDate	Oct. 01, 2024
Class ACIS | DWS Health and Wellness Fund
Risk Return Abstract	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	<span style="color:#000000;font-family:Arial;font-size:14pt;">DWS Health and Wellness Fund</span>
Objective [Heading]	rr_ObjectiveHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Investment Objective</span>
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The fund seeks long-term growth of capital.
Expense [Heading]	rr_ExpenseHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Fees and Expenses</span>
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	These are the fees and expenses you may pay when you buy, hold and sell shares. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.You may qualify for sales charge discounts in Class A shares if you and your immediate family invest, or agree to invest in the future, at least $50,000 in DWS funds. More information about these and other discounts and waivers is available from your financial representative and in Choosing a Share Class (p. 29), Sales Charge Waivers and Discounts Available Through Intermediaries (Appendix B, p. 63) and Purchase and Redemption of Shares in the fund’s Statement of Additional Information (SAI) (p. II-15).
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	<span style="color:#000000;font-family:Arial;font-size:10pt;text-transform:uppercase;">SHAREHOLDER FEES </span><span style="color:#000000;font-family:Arial;font-size:8pt;">(paid directly from your investment)</span>
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	<span style="color:#000000;font-family:Arial;font-size:10pt;text-transform:uppercase;">ANNUAL FUND OPERATING EXPENSES</span> <br/><span style="color:#000000;font-family:Arial;font-size:8pt;">(expenses that you pay each year as a % of the value of your investment)</span>
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	<span style="font-family:Arial;font-size:10pt;">September 30, 2025</span>
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;text-transform:uppercase;">PORTFOLIO TURNOVER </span>
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may mean higher taxes if you are investing in a taxable account. These costs are not reflected in annual fund operating expenses or in the expense example, and can affect the fund's performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 1% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	1.00%
Expense Footnotes [Text Block]	rr_ExpenseFootnotesTextBlock	The Advisor has contractually agreed through September 30, 2025 to waive its fees and/or reimburse fund expenses to the extent necessary to maintain the fund’s total annual operating expenses (excluding certain expenses such as extraordinary expenses, taxes, brokerage, interest expense and acquired fund fees and expenses) at 2.10% for Class C. The agreement may only be terminated with the consent of the fund’s Board.
Expenses Deferred Charges [Text Block]	rr_ExpensesDeferredChargesTextBlock	Investments of $1,000,000 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 1.00% if redeemed within 12 months of the original purchase date and 0.50% if redeemed within the following six months.
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	<span style="color:#000000;font-family:Arial;font-size:10pt;">You may qualify for sales charge discounts in Class A shares if you and your immediate family invest, or agree to invest in the future, at least </span><span style="color:#000000;font-family:Arial;font-size:10pt;">$50,000 </span><span style="color:#000000;font-family:Arial;font-size:10pt;"> in DWS funds.</span>
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 50,000
Expense Example [Heading]	rr_ExpenseExampleHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;text-transform:uppercase;">EXAMPLE</span>
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses (including one year of capped expenses for Class C in each period) remain the same. Class C shares generally convert automatically to Class A shares after 8 years. The information presented in the Example for Class C reflects the conversion of Class C shares to Class A shares after 8 years. See “Class C Shares” in the “Choosing a Share Class” section of the prospectus for more information. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example, No Redemption Narrative [Text Block]	rr_ExpenseExampleNoRedemptionNarrativeTextBlock	You would pay the following expenses if you did not redeem your shares:
Strategy [Heading]	rr_StrategyHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Principal Investment Strategies</span>
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Main investments. Under normal circumstances, the fund will invest at least 80% of net assets, plus the amount of any borrowings for investment purposes, in equity securities of companies in the health care and wellness sectors. For purposes of the fund’s 80% investment policy, to be considered part of the health care or wellness sectors, companies must commit at least half of their assets to, or derive at least half of their revenues or net income from, that sector. Industries in the health care sector include pharmaceuticals, biotechnology, medical products and supplies, and health care services. Portfolio management considers wellness-related companies to include companies in the health care industry and other companies that provide products or services that promote or aid in achieving a healthy lifestyle (for example, healthy food and nutrition companies and gym operators). The fund concentrates its assets (i.e. invests at least 25% of its net assets) in securities related to the health care sector.The fund invests primarily in securities of US companies, but may invest in foreign companies as well. The fund may invest in companies of any size. While the fund invests mainly in common stocks, it may also invest up to 20% of total assets in US Treasury and US agency debt obligations.Management process. In choosing stocks, portfolio management uses a combination of three analytical disciplines:Bottom-up research. Portfolio management looks for individual companies with a history of above-average growth, strong competitive positioning, new tests or treatments, the ability to take advantage of demographic trends, attractive prices relative to potential growth, sound financial strength and effective management, among other factors. Portfolio management generally also considers financially material environmental, social and governance (ESG) factors. Such factors may include, but are not limited to, good governance structure and practices.Growth orientation. Portfolio management generally looks for companies that it believes have above-average potential for sustainable growth of revenue or earnings and whose market value appears reasonable in light of their business prospects.Top-down analysis. Portfolio management considers the economic outlook for various industries within the health care sector while looking for those that it believes may benefit from changes in the overall business environment.Portfolio management may favor securities from different industries and companies within the health care sector at different times. Portfolio management will normally sell a stock when it believes the stock's price is unlikely to go higher, its fundamental factors have changed, other investments offer better opportunities, or in the course of adjusting their emphasis on a given health care industry.Securities lending. The fund may lend securities (up to one-third of total assets) to approved institutions, such as registered broker-dealers, pooled investment vehicles, banks and other financial institutions. In connection with such loans, the fund receives liquid collateral in an amount that is based on the type and value of the securities being lent, with riskier securities generally requiring higher levels of collateral.
Strategy Portfolio Concentration [Text]	rr_StrategyPortfolioConcentration	<span style="color:#000000;font-family:Arial;font-size:10pt;">The fund concentrates</span><span style="color:#000000;font-family:Arial;font-size:10pt;"> its assets (i.e. invests at least 25% of its net assets) in securities related to the health care sector.</span>
Risk [Heading]	rr_RiskHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Main Risks</span>
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Past Performance</span>
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	How a fund's returns vary from year to year can give an idea of its risk; so can comparing fund performance to overall market performance (as measured by an appropriatebroad-based securities market index).Past performance may not indicate future results. All performance figures below assume that dividends and distributions were reinvested. For more recent performance figures, go to dws.com (the Web site does not form a part of this prospectus) or call the telephone number included in this prospectus.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	<span style="font-family:Arial;font-size:10pt;">How a fund's returns vary from year to year can give an idea of its risk; so can comparing fund performance to overall market performance (as measured by an appropriate</span><span style="font-family:Arial;font-size:10pt;">broad-based securities market index).</span>
Performance Additional Market Index [Text]	rr_PerformanceAdditionalMarketIndex	<span style="font-family:Arial;font-size:10pt;">The fund’s additional index, the MSCI World Health Care Index,</span><span style="font-family:Arial;font-size:10pt;line-height:12pt;"> </span><span style="font-family:Arial;font-size:10pt;">is a more narrowly based index that reflects the market sector in which the fund invests.</span>
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	<span style="font-family:Arial;font-size:10pt;">dws.com</span><span style="color:#000000;font-family:Arial;font-size:10pt;">dws.com</span>
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	<span style="font-family:Arial;font-size:10pt;">Past </span><span style="font-family:Arial;font-size:10pt;">performance may not indicate future results.</span>
Bar Chart [Heading]	rr_BarChartHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;text-transform:uppercase;">CALENDAR YEAR TOTAL RETURNS </span><span style="color:#000000;font-family:Arial;font-size:8pt;">(%) (Class A)</span>
Bar Chart Narrative [Text Block]	rr_BarChartNarrativeTextBlock	These year-by-year returns do not include sales charges, if any, and would be lower if they did. Returns for other classes were different and are not shown here.
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	<span style="color:#000000;font-family:Arial;font-size:10pt;">These year-by-year returns do not include sales charges, if any, and would be lower if they did.</span>
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	ReturnsPeriod endingBest Quarter17.13%June 30, 2020Worst Quarter-12.57%September 30, 2015Year-to-Date9.33%June 30, 2024
Performance Table Heading	rr_PerformanceTableHeading	<span style="font-family:Arial;font-size:10pt;text-transform:uppercase;">Average Annual Total Returns</span> <br/><span style="font-family:Arial;font-size:8pt;">(For periods ended 12/31/2023 expressed as a %)</span>
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	<span style="color:#000000;font-family:Arial;font-size:10pt;">After-tax returns (which are shown only for Class A and would be different for other classes)</span><span style="color:#000000;font-family:Arial;font-size:10pt;"> reflect the historical </span><span style="color:#000000;font-family:Arial;font-size:10pt;">highest individual federal income tax rates, but do not reflect any state or local taxes.</span>
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	<span style="color:#000000;font-family:Arial;font-size:10pt;">After-tax returns are not relevant to </span><span style="color:#000000;font-family:Arial;font-size:10pt;">shares held in an IRA, 401(k) or other tax-advantaged investment plan.</span>
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	<span style="color:#000000;font-family:Arial;font-size:10pt;">After-tax returns (which are shown only for Class A and would be different for other classes)</span>
Performance Table Narrative	rr_PerformanceTableNarrativeTextBlock	After-tax returns (which are shown only for Class A and would be different for other classes) reflect the historical highest individual federal income tax rates, but do not reflect any state or local taxes. Your actual after-tax returns may be different. After-tax returns are not relevant to shares held in an IRA, 401(k) or other tax-advantaged investment plan.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	The fund’s additional index, the MSCI World Health Care Index, is a more narrowly based index that reflects the market sector in which the fund invests.
Class ACIS | DWS Health and Wellness Fund | Risk Lose Money [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	There are several risk factors that could hurt the fund’s performance, cause you to lose money or cause the fund’s performance to trail that of other investments.
Class ACIS | DWS Health and Wellness Fund | Risk Not Insured Depository Institution [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.
Class ACIS | DWS Health and Wellness Fund | Risk Stock Market [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Stock market risk. When stock prices fall, you should expect the value of your investment to fall as well. Stock prices can be hurt by poor management on the part of the stock’s issuer, shrinking product demand and other business risks. These may affect single companies as well as groups of companies. The market as a whole may not favor the types of investments the fund makes, which could adversely affect a stock’s price, regardless of how well the company performs, or the fund’s ability to sell a stock at an attractive price. There is a chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising and falling prices. Events in the US and global financial markets, including actions taken by the US Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times result in unusually high market volatility which could negatively affect performance. High market volatility may also result from significant shifts in momentum of one or more specific stocks due to unusual increases or decreases in trading activity. Momentum can change quickly, and securities subject to shifts in momentum may be more volatile than the market as a whole and returns on such securities may drop precipitously. To the extent that the fund invests in a particular geographic region, capitalization or sector, the fund’s performance may be affected by the general performance of that region, capitalization or sector.
Class ACIS | DWS Health and Wellness Fund | Risk Market Disruption [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Market disruption risk. Economies and financial markets throughout the world have become increasingly interconnected, which has increased the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. This includes reliance on global supply chains that are susceptible to disruptions resulting from, among other things, war and other armed conflicts, extreme weather events, and natural disasters. Such supply chain disruptions can lead to, and have led to, economic and market disruptions that have far-reaching effects on financial markets worldwide.The value of the fund’s investments may be negatively affected by adverse changes in overall economic or market conditions, such as the level of economic activity and productivity, unemployment and labor force participation rates, inflation or deflation (and expectations for inflation or deflation), interest rates, demand and supply for particular products or resources including labor, and debt levels and credit ratings, among other factors. Such adverse conditions may contribute to an overall economic contraction across entire economies or markets, which may negatively impact the profitability of issuers operating in those economies or markets. In addition, geopolitical and other globally interconnected occurrences, including war, terrorism, economic uncertainty or financial crises, contagion, trade disputes, government debt crises (including defaults or downgrades) or uncertainty about government debt payments, government shutdowns, public health crises, natural disasters, supply chain disruptions, climate change and related events or conditions, have led, and in the future may lead, to disruptions in the US and world economies and markets, which may increase financial market volatility and have significant adverse direct or indirect effects on the fund and its investments. Adverse market conditions or disruptions could cause the fund to lose money, experience significant redemptions, and encounter operational difficulties. Although multiple asset classes may be affected by adverse market conditions or a particular market disruption, the duration and effects may not be the same for all types of assets.Current military and other armed conflicts in various geographic regions, including those in Europe and the Middle East, can lead to, and have led to, economic and market disruptions, which may not be limited to the geographic region in which the conflict is occurring. Such conflicts can also result, and have resulted in some cases, in sanctions being levied by the United States, the European Union and/or other countries against countries or other actors involved in the conflict. In addition, such conflicts and related sanctions can adversely affect regional and global energy, commodities, financial and other markets and thus could affect the value of the fund's investments. The extent and duration of any military conflict, related sanctions and resulting economic and market disruptions are impossible to predict, but could be substantial.Other market disruption events include pandemic spread of viruses, such as the novel coronavirus known as COVID-19, which have caused significant uncertainty, market volatility, decreased economic and other activity, increased government activity, including economic stimulus measures, and supply chain disruptions. While COVID-19 is no longer considered to be a public health emergency, the fund and its investments may be adversely affected by lingering effects of this virus or future pandemic spread of viruses.In addition, markets are becoming increasingly susceptible to disruption events resulting from the use of new and emerging technologies to engage in cyber-attacks or to take over the Web sites and/or social media accounts of companies, governmental entities or public officials, or to otherwise pose as or impersonate such, which then may be used to disseminate false or misleading information that can cause volatility in financial markets or for the stock of a particular company, group of companies, industry or other class of assets.Adverse market conditions or particular market disruptions, such as those discussed above, may magnify the impact of each of the other risks described in this “MAIN RISKS” section and may increase volatility in one or more markets in which the fund invests leading to the potential for greater losses for the fund.
Class ACIS | DWS Health and Wellness Fund | Risk Health Care Securities [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Health care securities risk. Because the fund concentrates its investments in companies in the health care sector, and may invest to a significant extent in the wellness sector, it may be vulnerable to setbacks in those industries. Health care companies may be negatively affected by scientific or technological developments, research and development costs, increased competition within the health care industry, rapid product obsolescence and patent expirations. The price of securities of health care companies may fluctuate widely due to changes in legislation or other government regulations, including uncertainty regarding health care reform and its long term impact, reductions in government funding and the unpredictability of winning government approvals. Moreover, many health care companies are subject to product liability or other litigation which may have a significant impact on a company’s market value or share price.
Class ACIS | DWS Health and Wellness Fund | Risk Concentration [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Concentration risk. Any fund that concentrates in a particular segment of the market will generally be more volatile than a fund that invests more broadly. Any market price movements, regulatory or technological changes, or economic conditions affecting the particular segment of the market in which the fund concentrates may have a significant impact on the fund’s performance.
Class ACIS | DWS Health and Wellness Fund | Risk Security Selection [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Security selection risk. The securities in the fund’s portfolio may decline in value. Portfolio management could be wrong in its analysis of industries, companies, economic trends, ESG factors, the relative attractiveness of different securities or other matters.
Class ACIS | DWS Health and Wellness Fund | Risk Growth Investing [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Growth investing risk. As a category, growth stocks may underperform value stocks (and the stock market as a whole) over any period of time and may shift in and out of favor with investors generally, sometimes rapidly, depending on changes in market, economic and other factors that could impact expectations of future earnings. Because the prices of growth stocks are based largely on the expectation of future earnings, growth stock prices can decline rapidly and significantly in reaction to negative news about such factors as earnings, the economy, political developments, or other news.
Class ACIS | DWS Health and Wellness Fund | Risk Small Company [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Small company risk. Small company stocks tend to be more volatile than medium-sized or large company stocks. Because stock analysts are less likely to follow small companies, less information about them is available to investors. Industry-wide reversals may have a greater impact on small companies, since they may lack the financial resources of larger companies. Small company stocks are typically less liquid than large company stocks.
Class ACIS | DWS Health and Wellness Fund | Risk Foreign Investment [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Foreign investment risk. The fund faces the risks inherent in foreign investing. Adverse political, economic or social developments, as well as US and foreign government actions such as the imposition of tariffs, economic and trade sanctions or embargoes, could undermine the value of the fund’s foreign investments, prevent the fund from realizing the full value of its foreign investments or prevent the fund from selling foreign securities it holds.Financial reporting standards for companies based in foreign markets differ from those in the US. Additionally, foreign securities markets generally are smaller and less liquid than US markets. To the extent that the fund invests in non-US dollar denominated foreign securities, changes in currency exchange rates may affect the US dollar value of foreign securities or the income or gain received on these securities. In addition, because non-US markets may be open on days when the fund does not price its shares, the value of the foreign securities in the fund’s portfolio may change on days when shareholders will not be able to purchase or sell the fund’s shares.
Class ACIS | DWS Health and Wellness Fund | Risk Securities Lending [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Securities lending risk. Securities lending involves the risk that the fund may lose money because the borrower of the loaned securities fails to return the securities in a timely manner or at all. A delay in the recovery of loaned securities could interfere with the fund’s ability to vote proxies or settle transactions. Delayed settlement may limit the ability of the fund to reinvest the proceeds of a sale of securities or prevent the fund from selling securities at times and prices it considers desirable. The fund could also lose money in the event of a decline in the value of the collateral provided for the loaned securities, or a decline in the value of any investments made with cash collateral or even a loss of rights in the collateral should the borrower of the securities fail financially while holding the securities.
Class ACIS | DWS Health and Wellness Fund | Risk Counterparty [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Counterparty risk. A financial institution or other counterparty with whom the fund does business, or that underwrites, distributes or guarantees any investments or contracts that the fund owns or is otherwise exposed to, may decline in financial health and become unable to honor its commitments. This could cause losses for the fund or could delay the return or delivery of collateral or other assets to the fund.
Class ACIS | DWS Health and Wellness Fund | Risk Liquidity [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Liquidity risk. In certain situations, it may be difficult or impossible to sell an investment and/or the fund may sell certain investments at a price or time that is not advantageous in order to meet redemption requests or other cash needs. Unusual market conditions, such as an unusually high volume of redemptions or other similar conditions could increase liquidity risk for the fund.
Class ACIS | DWS Health and Wellness Fund | Risk Pricing [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Pricing risk. If market conditions make it difficult to value some investments, the fund may value these investments using more subjective methods, such as fair value pricing. In such cases, the value determined for an investment could be different from the value realized upon such investment’s sale. As a result, you could pay more than the market value when buying fund shares or receive less than the market value when selling fund shares.
Class ACIS | DWS Health and Wellness Fund | Risk Operational And Technology [Member]
Risk Return Abstract	rr_RiskReturnAbstract
Risk [Text Block]	rr_RiskTextBlock	Operational and technology risk. Cyber-attacks, disruptions or failures that affect the fund’s service providers or counterparties, issuers of securities held by the fund, or other market participants may adversely affect the fund and its shareholders, including by causing losses for the fund or impairing fund operations. For example, the fund’s or its service providers’ assets or sensitive or confidential information may be misappropriated, data may be corrupted and operations may be disrupted (e.g., cyber-attacks, operational failures or broader disruptions may cause the release of private shareholder information or confidential fund information, interfere with the processing of shareholder transactions, impact the ability to calculate the fund’s net asset value and impede trading). Market events and disruptions also may trigger a volume of transactions that overloads current information technology and communication systems and processes, impacting the ability to conduct the fund’s operations.While the fund and its service providers may establish business continuity and other plans and processes that seek to address the possibility of and fallout from cyber-attacks, disruptions or failures, there are inherent limitations in such plans and systems, including that they do not apply to third parties, such as fund counterparties, issuers of securities held by the fund or other market participants, as well as the possibility that certain risks have not been identified or that unknown threats may emerge in the future and there is no assurance that such plans and processes will be effective. Among other situations, disruptions (for example, pandemics or health crises) that cause prolonged periods of remote work or significant employee absences at the fund’s service providers could impact the ability to conduct the fund’s operations. In addition, the fund cannot directly control any cybersecurity plans and systems put in place by its service providers, fund counterparties, issuers of securities held by the fund or other market participants.
Class ACIS | DWS Health and Wellness Fund | Class A
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases, as % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.75%
Maximum deferred sales charge (load), as % of redemption proceeds	rr_MaximumDeferredSalesChargeOverOther	none	[1]
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions)	rr_MaximumAccountFee	$ 20
Management fee	rr_ManagementFeesOverAssets	0.77%
Distribution/service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.24%
Other expenses	rr_OtherExpensesOverAssets	0.33%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.34%
Fee waiver/expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total annual fund operating expenses after fee waiver/expense reimbursement	rr_NetExpensesOverAssets	1.34%
1 Year	rr_ExpenseExampleYear01	$ 704
3 Years	rr_ExpenseExampleYear03	975
5 Years	rr_ExpenseExampleYear05	1,267
10 Years	rr_ExpenseExampleYear10	2,095
1 Year	rr_ExpenseExampleNoRedemptionYear01	704
3 Years	rr_ExpenseExampleNoRedemptionYear03	975
5 Years	rr_ExpenseExampleNoRedemptionYear05	1,267
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 2,095
2014	rr_AnnualReturn2014	26.60%
2015	rr_AnnualReturn2015	6.57%
2016	rr_AnnualReturn2016	(10.46%)
2017	rr_AnnualReturn2017	19.01%
2018	rr_AnnualReturn2018	3.29%
2019	rr_AnnualReturn2019	21.94%
2020	rr_AnnualReturn2020	15.14%
2021	rr_AnnualReturn2021	15.05%
2022	rr_AnnualReturn2022	(7.44%)
2023	rr_AnnualReturn2023	5.15%
Year to Date Return, Label	rr_YearToDateReturnLabel	<span style="font-family:Arial;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Year-to-Date</span>
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Jun. 30, 2024
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	9.33%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	<span style="font-family:Arial;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Best Quarter</span>
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	17.13%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	<span style="font-family:Arial;font-size:8pt;font-weight:bold;margin-left:0.0pt;">Worst Quarter</span>
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2015
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(12.57%)
Class ACIS | DWS Health and Wellness Fund | Class C
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases, as % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load), as % of redemption proceeds	rr_MaximumDeferredSalesChargeOverOther	1.00%	[1]
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions)	rr_MaximumAccountFee	$ 20
Management fee	rr_ManagementFeesOverAssets	0.77%
Distribution/service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.99%
Other expenses	rr_OtherExpensesOverAssets	0.35%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.11%
Fee waiver/expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.01%
Total annual fund operating expenses after fee waiver/expense reimbursement	rr_NetExpensesOverAssets	2.10%
1 Year	rr_ExpenseExampleYear01	$ 313
3 Years	rr_ExpenseExampleYear03	660
5 Years	rr_ExpenseExampleYear05	1,133
10 Years	rr_ExpenseExampleYear10	2,244
1 Year	rr_ExpenseExampleNoRedemptionYear01	213
3 Years	rr_ExpenseExampleNoRedemptionYear03	660
5 Years	rr_ExpenseExampleNoRedemptionYear05	1,133
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 2,244
Class ACIS | DWS Health and Wellness Fund | INST Class
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases, as % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load), as % of redemption proceeds	rr_MaximumDeferredSalesChargeOverOther	none	[1]
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions)	rr_MaximumAccountFee	none
Management fee	rr_ManagementFeesOverAssets	0.77%
Distribution/service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.31%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.08%
Fee waiver/expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total annual fund operating expenses after fee waiver/expense reimbursement	rr_NetExpensesOverAssets	1.08%
1 Year	rr_ExpenseExampleYear01	$ 110
3 Years	rr_ExpenseExampleYear03	343
5 Years	rr_ExpenseExampleYear05	595
10 Years	rr_ExpenseExampleYear10	1,317
1 Year	rr_ExpenseExampleNoRedemptionYear01	110
3 Years	rr_ExpenseExampleNoRedemptionYear03	343
5 Years	rr_ExpenseExampleNoRedemptionYear05	595
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,317
Class ACIS | DWS Health and Wellness Fund | Class S
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases, as % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load), as % of redemption proceeds	rr_MaximumDeferredSalesChargeOverOther	none	[1]
Account Maintenance Fee (annually, for fund account balances below $10,000 and subject to certain exceptions)	rr_MaximumAccountFee	$ 20
Management fee	rr_ManagementFeesOverAssets	0.77%
Distribution/service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	0.29%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.06%
Fee waiver/expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	none
Total annual fund operating expenses after fee waiver/expense reimbursement	rr_NetExpensesOverAssets	1.06%
1 Year	rr_ExpenseExampleYear01	$ 108
3 Years	rr_ExpenseExampleYear03	337
5 Years	rr_ExpenseExampleYear05	585
10 Years	rr_ExpenseExampleYear10	1,294
1 Year	rr_ExpenseExampleNoRedemptionYear01	108
3 Years	rr_ExpenseExampleNoRedemptionYear03	337
5 Years	rr_ExpenseExampleNoRedemptionYear05	585
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,294
Class ACIS | DWS Health and Wellness Fund | before tax | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(0.89%)
5 Years	rr_AverageAnnualReturnYear05	8.18%
10 Years	rr_AverageAnnualReturnYear10	8.21%
Class Inception	rr_AverageAnnualReturnInceptionDate	Dec. 29, 2000
Class ACIS | DWS Health and Wellness Fund | before tax | Class C
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	3.39%
5 Years	rr_AverageAnnualReturnYear05	8.67%
10 Years	rr_AverageAnnualReturnYear10	8.04%
Class Inception	rr_AverageAnnualReturnInceptionDate	Dec. 29, 2000
Class ACIS | DWS Health and Wellness Fund | before tax | INST Class
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	5.44%
5 Years	rr_AverageAnnualReturnYear05	9.76%
10 Years	rr_AverageAnnualReturnYear10	9.14%
Class Inception	rr_AverageAnnualReturnInceptionDate	Dec. 29, 2000
Class ACIS | DWS Health and Wellness Fund | before tax | Class S
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	5.44%
5 Years	rr_AverageAnnualReturnYear05	9.76%
10 Years	rr_AverageAnnualReturnYear10	9.13%
Class Inception	rr_AverageAnnualReturnInceptionDate	Mar. 02, 1998
Class ACIS | DWS Health and Wellness Fund | After tax on distributions | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	(2.22%)
5 Years	rr_AverageAnnualReturnYear05	6.28%
10 Years	rr_AverageAnnualReturnYear10	6.08%
Class ACIS | DWS Health and Wellness Fund | After tax on distributions and sale of fund shares | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	0.48%
5 Years	rr_AverageAnnualReturnYear05	6.29%
10 Years	rr_AverageAnnualReturnYear10	6.22%
Class ACIS | DWS Health and Wellness Fund | S&P 500® Index (reflects no deduction for fees, expenses or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	26.29%
5 Years	rr_AverageAnnualReturnYear05	15.69%
10 Years	rr_AverageAnnualReturnYear10	12.03%
Class ACIS | DWS Health and Wellness Fund | MSCI World Health Care Index (reflects no deduction for fees, expenses or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	3.76%
5 Years	rr_AverageAnnualReturnYear05	10.47%
10 Years	rr_AverageAnnualReturnYear10	9.01%

[1] Investments of $1,000,000 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 1.00% if redeemed within 12 months of the original purchase date and 0.50% if redeemed within the following six months.