Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	DEUTSCHE DWS MUNICIPAL TRUST
Prospectus Date	rr_ProspectusDate	Oct. 01, 2022
Class ACIS | DWS Strategic High Yield Tax-Free Fund
Risk Return Abstract	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	<span style="color:#000000;font-family:Arial;font-size:14pt;">DWS Strategic High Yield Tax-Free 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 to provide a high level of income exempt from regular federal income tax.
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 $100,000 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.41), Sales Charge Waivers and Discounts Available Through Intermediaries (Appendix B, p. 78) 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;margin-left:0%;">(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, </span><span style="font-family:Arial;font-size:10pt;">2023</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 69% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	69.00%
Expense Footnotes [Text Block]	rr_ExpenseFootnotesTextBlock	The Advisor has contractually agreed through September 30, 2023 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 0.85%, 1.60%, 0.60% and 0.60% for Class A, Class C, Institutional Class and Class S, respectively. The agreement may only be terminated with the consent of the fund's Board.
Expenses Deferred Charges [Text Block]	rr_ExpensesDeferredChargesTextBlock	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 1.00% if redeemed within 12 months of the original purchase date.
Expense Breakpoint Discounts [Text]	rr_ExpenseBreakpointDiscounts	<span style="font-family:Arial;font-size:10pt;">You may qualify for sales charge </span><span style="font-family:Arial;font-size:10pt;">discounts in Class A shares if you and your immediate family invest, or agree to invest in the future, at least </span><span style="font-family:Arial;font-size:10pt;">$100,000 </span><span style="font-family:Arial;font-size:10pt;"> in DWS funds.</span>
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	$ 100,000
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 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 invests at least 80% of net assets in securities issued by municipalities across the United States and in other securities whose income is free from regular federal income tax. The fund may invest up to 20% of net assets in securities whose income is subject to the federal alternative minimum tax (AMT).The fund can buy many types of municipal securities of all maturities. These may include revenue bonds (which are backed by revenues from a particular source) and general obligation bonds (which are typically backed by the issuer's ability to levy taxes). They may also include municipal lease obligations and investments representing an interest therein.The fund normally invests at least 50% of total assets in municipal securities rated in the four highest credit rating categories. The fund may invest up to 50% of total assets in high yield debt securities (commonly referred to as junk bonds), which are those below the fourth highest credit rating category (i.e., grade BB/Ba and below) and may include debt securities not currently paying interest and debt securities in default. Compared to investment-grade debt securities, junk bonds generally pay higher yields, have higher volatility and higher risk of default on payments of interest or principal.The fund may use forward delivery bonds, which are bonds priced on a determined date but that are not issued and settled until a later period (ranging from several weeks to more than a year). The fund may also engage in tender option bond transactions. In a tender option bond transaction, the fund transfers fixed-rate long-term municipal bonds into a special purpose entity (a “TOB Trust”), which then typically issues two classes of beneficial interests: short-term floating rate interests (“TOB Floaters”), which are sold to third party investors, and residual inverse floating rate interests (“TOB Inverse Floater Residual Interests”), which are generally held by the fund. Forward delivery bonds with settlement dates greater than 35 days and tender option bond transactions are treated as derivatives by the fund and are subject to the fund's policies and procedures with respect to derivatives. Forward delivery bonds with settlement dates greater than 35 days generally are used for non-hedging purposes to seek to enhance potential gains. The fund may leverage its assets and seek to enhance potential gains through the use of proceeds received from TOB Floaters.The fund may also invest in exchange-traded funds (ETFs). The fund’s investments in ETFs will be limited to 5% of total assets in any one ETF and 10% of total assets in the aggregate in ETFs.Management process. Portfolio management looks for securities that appear to offer the best opportunity to meet the fund's objective. In making its buy and sell decisions, portfolio management typically weighs a number of factors against each other, from economic outlooks and possible interest rate movements to changes in supply and demand within the municipal bond market. When evaluating any individual security and its issuer, portfolio management may consider a number of factors including the security’s credit quality and terms, such as coupon, maturity date and call date, as well as the issuer’s capital structure, leverage, and ability to meet its current obligations. Portfolio management may also consider financially material environmental, social, and governance (ESG) factors. Such factors may include, but are not limited to, exposure to climate change risks, poverty and unemployment data, and an issuer’s governance structure and practices.Although portfolio management may adjust the fund’s duration (a measure of sensitivity to interest rates) over a wider range, they generally intend to keep the fund’s duration similar to that of the Bloomberg Municipal Bond Index, which is generally between five and nine years.Derivatives. Portfolio management generally may use futures contracts, which are a type of derivative (a contract whose value is based on, for example, indices, currencies or securities), for duration management (i.e., reducing or increasing the sensitivity of the fund's portfolio to interest rate changes).The fund may also use other types of derivatives (i) for hedging purposes; (ii) for risk management; (iii) for non-hedging purposes to seek to enhance potential gains; or (iv) as a substitute for direct investment in a particular asset class or to keep cash on hand to meet shareholder redemptions.
Risk [Heading]	rr_RiskHeading	<span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;text-transform:uppercase;">Main Risks</span>
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	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. The fund may not achieve its investment objective, and is not intended to be a complete investment program. 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.Municipal securities risk. Municipal instruments may be susceptible to periods of economic stress, which could affect the market values and marketability of many or all municipal obligations of issuers in a state, US territory, or possession. For example, the COVID-19 pandemic has significantly stressed the financial resources of some municipal issuers, which may impair a municipal issuer’s ability to meet its financial obligations when due and could adversely impact the value of its bonds, which could negatively impact the performance of the fund. The fund could also be impacted by events in the municipal securities market, including the supply and demand for municipal securities. Negative events, such as severe fiscal difficulties, bankruptcy of one or more issuers, an economic downturn, unfavorable legislation, court rulings or political developments, or reduced monetary support from the federal government could hurt fund performance. The municipal securities market can be susceptible to increases in volatility and decreases in liquidity. Liquidity can decline unpredictably in response to overall economic conditions or credit tightening. Increases in volatility and decreases in liquidity may be caused by a rise in interest rates (or the expectation of a rise in interest rates). Municipal securities may include revenue bonds, which are generally backed by revenue from a specific project or tax. The issuer of a revenue bond makes interest and principal payments from revenues generated from a particular source or facility, such as a tax on particular property or revenues generated from a municipal water or sewer utility or an airport. Revenue bonds generally are not backed by the full faith and credit and general taxing power of the issuer. The value of municipal securities is strongly influenced by the value of tax-exempt income to investors. Changes in tax and other laws, including changes to individual or corporate tax rates, could alter the attractiveness and overall demand for municipal securities.Certain sectors of the municipal securities market such as hospitals, airports and mass transit providers may be disproportionately impacted by COVID-19 related cost increases and revenue declines, potentially resulting in heightened credit risk for issuers in these sectors.Interest rate risk. When interest rates rise, prices of debt securities generally decline. The longer the duration of the fund’s debt securities, the more sensitive the fund will be to interest rate changes. (As a general rule, a 1% rise in interest rates means a 1% fall in value for every year of duration.) When interest rates change, the values of longer-duration municipal bonds usually change more than the values of shorter-duration municipal bonds. Conversely, municipal bonds with shorter durations or maturities will be less volatile but may provide lower returns than municipal bonds with longer durations or maturities. Rising interest rates also may lengthen the duration of municipal bonds with call features, since exercise of the call becomes less likely as interest rates rise, which in turn will make the securities more sensitive to changes in interest rates and result in even steeper price declines in the event of further interest rate increases. Interest rates can change in response to the supply and demand for credit, government and/or central bank monetary policy and action, inflation rates, and other factors. Recent and potential future changes in monetary policy made by central banks or governments are likely to affect the level of interest rates. Changing interest rates may have unpredictable effects on markets, may result in heightened market volatility and potential illiquidity and may detract from fund performance to the extent the fund is exposed to such interest rates and/or volatility. Rising interest rates could cause the value of the fund’s investments — and therefore its share price as well — to decline. Although interest rates in the US remain at low levels, they have been rising and are expected to continue to increase in the near future. A rising interest rate environment may cause investors to move out of fixed-income securities and related markets on a large scale, which could adversely affect the price and liquidity of such securities and could also result in increased redemptions from the fund. Increased redemptions from the fund may force the fund to sell investments at a time when it is not advantageous to do so, which could result in losses. Recently, there have been signs of inflationary price movements. As such, fixed-incomeand related markets may experience heightened levels of interest rate volatility and liquidity risk. A sharp rise in interest rates could cause the value of the fund’s investments to decline.London Interbank Offered Rate (LIBOR), the benchmark rate for certain floating rate securities, has been phased out as of the end of 2021 for most maturities and currencies, although certain widely used US Dollar LIBOR rates are expected to continue to be published through June 2023 to assist with the transition. The transition process from LIBOR towards its expected replacement reference rate with the Secured Overnight Financing Rate (SOFR) for US Dollar LIBOR rates has become increasingly well defined, especially following the signing of the federal Adjustable Interest Rate (LIBOR) Act in March 2022 which will replace LIBOR-based benchmark rates in instruments with no, or insufficient, alternative rate-setting provisions with a SOFR-based rate following the cessation of LIBOR. However, the fund or the instruments in which the fund invests may be adversely affected by the transition from LIBOR to SOFR by, among other things, increased volatility or illiquidity.Credit risk. The fund's performance could be hurt if an issuer of a debt security suffers an adverse change in financial condition that results in the issuer not making timely payments of interest or principal, a security downgrade or an inability to meet a financial obligation. Credit risk is greater for lower-rated securities.Because the issuers of high yield debt securities, or junk bonds (debt securities rated below the fourth highest credit rating category), may be in uncertain financial health, the prices of their debt securities can be more vulnerable to bad economic news, or even the expectation of bad news, than investment-grade debt securities. Credit risk for high yield securities is greater than for higher-rated securities.Because securities in default generally have missed one or more payments of interest and/or principal, an investment in such securities has an increased risk of loss. Issuers of securities in default have an increased likelihood of entering bankruptcy or beginning liquidation procedures which could impact the fund's ability to recoup its investment. Securities in default may be illiquid or trade in low volumes and thus may be difficult to value.For securities that rely on third-party guarantors to support their credit quality, the same risks may apply if the financial condition of the guarantor deteriorates or the guarantor ceases to insure securities. Because guarantors may insure many types of securities, including subprime mortgage bonds and other high-risk bonds, their financial condition could deteriorate as a result of events that have little or no connection to securities owned by the fund.High yield debt securities risk. High yield debt securities, or junk bonds, are generally regarded as speculative with respect to the issuer’s continuing ability to meet principal and interest payments. High yield debt securities’ total return and yield may generally be expected to fluctuate more than the total return and yield of investment-grade debt securities. A real or perceived economic downturn or an increase in market interest rates could cause a decline in the value of high yield debt securities, result in increased redemptions and/or result in increased portfolio turnover, which could result in a decline in net asset value of the fund, reduce liquidity for certain investments and/or increase costs. High yield debt securities are often thinly traded and can be more difficult to sell and value accurately than investment-grade debt securities as there may be no established secondary market. Investments in high yield debt securities could increase liquidity risk for the fund. In addition, the market for high yield debt securities can experience sudden and sharp volatility which is generally associated more with investments in stocks.Focus risk. To the extent that the fund focuses on investments from a single state, region or sector of the municipal securities market, its performance can be more volatile than that of a fund that invests more broadly. As an example, factors affecting a state, region or sector such as severe fiscal difficulties, an economic downturn, court rulings, increased expenditures on domestic security or reduced monetary support from the federal government could over time impair a state, region or sector's ability to repay its obligations.Market risk. Deteriorating market conditions might cause a general weakness in the market that reduces the prices of securities in that market. Developments in a particular class of debt securities or the stock market could also adversely affect the fund by reducing the relative attractiveness of debt securities as an investment.Security selection risk. The securities in the fund’s portfolio may decline in value. Portfolio management could be wrong in its analysis of municipalities, industries, companies, economic trends, ESG factors, the relative attractiveness of different securities or other matters.Tax risk. Income from municipal securities held by the fund could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or state tax authorities, or noncompliant conduct of a securities issuer. In such event, the value of such securities would likely fall, hurting fund performance and shareholders may be required to pay additionaltaxes. In addition, a portion of the fund’s otherwise exempt-interest distributions may be taxable to those shareholders subject to the federal AMT.Market disruption risk. Geopolitical and other events, including war, terrorism, economic uncertainty, trade disputes, public health crises and related geopolitical events 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. Market disruptions could cause the fund to lose money, experience significant redemptions, and encounter operational difficulties. Although multiple asset classes may be affected by a market disruption, the duration and effects may not be the same for all types of assets.Russia's recent military incursions in Ukraine have led to, and may lead to, additional sanctions being levied by the United States, European Union and other countries against Russia. Russia's military incursions and the resulting sanctions could adversely affect global energy and financial markets and thus could affect the value of the fund's investments. The extent and duration of the military action, sanctions and resulting market disruptions are impossible to predict, but could be substantial.Other market disruption events include the pandemic spread of the novel coronavirus known as COVID-19, and the significant uncertainty, market volatility, decreased economic and other activity, increased government activity, including economic stimulus measures, and supply chain disruptions that it has caused. The full effects, duration and costs of the COVID-19 pandemic are impossible to predict, and the circumstances surrounding the COVID-19 pandemic will continue to evolve including the risk of future increased rates of infection due to significant portions of the population remaining unvaccinated and/or the lack of effectiveness of current vaccines against new variants. The pandemic has affected and may continue to affect certain countries, industries, economic sectors, companies and investment products more than others, may exacerbate existing economic, political, or social tensions and may increase the probability of an economic recession or depression. The fund and its investments may be adversely affected by the effects of the COVID-19 pandemic, and the pandemic may result in the fund and its service providers experiencing operational difficulties in coordinating a remote workforce and implementing their business continuity plans, among others.Market disruptions, such as those caused by Russian military action and the COVID-19 pandemic, 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.Inflation risk. Inflation risk is the risk that the real value of certain assets or real income from investments (the value of such assets or income after accounting for inflation) will be less in the future as inflation decreases the value of money. Inflation, and investors’ expectation of future inflation, can impact the current value of the fund's portfolio,resulting in lower asset values and losses to shareholders. This risk may be elevated compared to historical market conditions because of recent monetary policy measures and the current interest rate environment.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, and in extreme conditions, the fund could have difficulty meeting redemption requests.Prepayment and extension risk. When interest rates fall, issuers of high interest debt obligations may pay off the debts earlier than expected (prepayment risk), and the fund may have to reinvest the proceeds at lower yields. When interest rates rise, issuers of lower interest debt obligations may pay off the debts later than expected (extension risk), thus keeping the fund’s assets tied up in lower interest debt obligations. Ultimately, any unexpected behavior in interest rates could increase the volatility of the fund’s share price and yield and could hurt fund performance. Prepayments could also create capital gains tax liability in some instances.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.ETF risk. Because ETFs trade on a securities exchange, their shares may trade at a premium or discount to their net asset value. An ETF is subject to the risks of the assets in which it invests as well as those of the investment strategy it follows. The fund may incur brokerage costs when it buys and sells shares of an ETF and also bears its proportionate share of the ETF’s fees and expenses, which are passed through to ETF shareholders.Tender option bonds risk. The fund’s participation in tender option bond transactions may reduce the fund’s returns or increase volatility. Tender option bond transactions create leverage. Leverage magnifies returns, both positive and negative, and risk by magnifying the volatility of returns. An investment in TOB Inverse Floater Residual Interests will typically involve more risk than an investment in the underlying municipal bonds. The interest payment on TOB Inverse Floater Residual Interests generally will decrease when short-term interest rates increase. There are also risks associated with the tender option bond structure, which could result in terminating the trust. If a TOB Trust is terminated, the fund must sell other assets to buy back the TOB Floaters, which could negatively impact performance. Events that could cause a termination of the TOB Trust include a deterioration in the financial condition of the liquidity provider, a deterioration in the credit quality of underlying municipal bonds, or a decrease in the value of the underlying bonds due to rising interest rates.Derivatives risk. Derivatives involve risks different from,and possibly greater than, the risks associated with investing directly in securities and other more traditional investments. Risks associated with derivatives may include the risk that the derivative is not well correlated with the security, index or currency to which it relates; the risk that derivatives may result in losses or missed opportunities; the risk that the fund will be unable to sell the derivative because of an illiquid secondary market; the risk that a counterparty is unwilling or unable to meet its obligation, which risk may be heightened in derivative transactions entered into “over-the-counter” (i.e., not on an exchange or contract market); and the risk that the derivative transaction could expose the fund to the effects of leverage, including any leverage that may arise as a result of the longer settlement periods for forward delivery bonds or the use of tender option bond transactions, which could increase the fund's exposure to the market and magnify potential losses.Forward commitment risk. When the fund engages in forward or delayed delivery transactions, the fund relies on the counterparty to consummate the transaction. Failure to do so may result in the fund missing the opportunity to obtain a price or yield considered to be advantageous. Such transactions may also have the effect of leverage on the fund and may cause the fund to be more volatile.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.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.
Risk Lose Money [Text]	rr_RiskLoseMoney	<span style="color:#000000;font-family:Arial;font-size:10pt;">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.</span>
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	<span style="color:#000000;font-family:Arial;font-size:10pt;">An investment</span><span style="color:#000000;font-family:Arial;font-size:10pt;"> 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.</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 appropriate 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="color:#000000;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 market index).</span>
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	<span style="color:#000000;font-family:Arial;font-size:10pt;">dws.com</span><span style="font-family:Arial;font-size:10pt;">dws.com</span>
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	<span style="color:#000000;font-family:Arial;font-size:10pt;">Past performance may not indicate </span><span style="color:#000000;font-family:Arial;font-size:10pt;">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 Quarter4.71%March 31, 2014Worst Quarter-5.50%March 31, 2020Year-to-Date-14.88%June 30, 2022
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;margin-left:0%;">(For periods ended 12/31/</span><span style="font-family:Arial;font-size:8pt;">2021 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.
Class ACIS | DWS Strategic High Yield Tax-Free Fund | Class A
Risk Return Abstract	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases, as % of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	2.75%
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	0.41%
Distribution/service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Interest expense	rr_Component1OtherExpensesOverAssets	0.03%
Other expenses	rr_Component3OtherExpensesOverAssets	0.21%
Total other expenses	rr_OtherExpensesOverAssets	0.24%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.90%
Fee waiver/expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.02%
Total annual fund operating expenses after fee waiver/expense reimbursement	rr_NetExpensesOverAssets	0.88%
1 Year	rr_ExpenseExampleYear01	$ 362
3 Years	rr_ExpenseExampleYear03	552
5 Years	rr_ExpenseExampleYear05	758
10 Years	rr_ExpenseExampleYear10	1,351
1 Year	rr_ExpenseExampleNoRedemptionYear01	362
3 Years	rr_ExpenseExampleNoRedemptionYear03	552
5 Years	rr_ExpenseExampleNoRedemptionYear05	758
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,351
2012	rr_AnnualReturn2012	12.18%
2013	rr_AnnualReturn2013	(5.84%)
2014	rr_AnnualReturn2014	11.57%
2015	rr_AnnualReturn2015	3.35%
2016	rr_AnnualReturn2016	1.01%
2017	rr_AnnualReturn2017	6.26%
2018	rr_AnnualReturn2018	(0.80%)
2019	rr_AnnualReturn2019	8.37%
2020	rr_AnnualReturn2020	4.05%
2021	rr_AnnualReturn2021	5.81%
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, 2022
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	(14.88%)
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	Mar. 31, 2014
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	4.71%
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	Mar. 31, 2020
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(5.50%)
Class ACIS | DWS Strategic High Yield Tax-Free 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	0.41%
Distribution/service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Interest expense	rr_Component1OtherExpensesOverAssets	0.03%
Other expenses	rr_Component3OtherExpensesOverAssets	0.22%
Total other expenses	rr_OtherExpensesOverAssets	0.25%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.66%
Fee waiver/expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.03%
Total annual fund operating expenses after fee waiver/expense reimbursement	rr_NetExpensesOverAssets	1.63%
1 Year	rr_ExpenseExampleYear01	$ 266
3 Years	rr_ExpenseExampleYear03	521
5 Years	rr_ExpenseExampleYear05	899
10 Years	rr_ExpenseExampleYear10	1,760
1 Year	rr_ExpenseExampleNoRedemptionYear01	166
3 Years	rr_ExpenseExampleNoRedemptionYear03	521
5 Years	rr_ExpenseExampleNoRedemptionYear05	899
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 1,760
Class ACIS | DWS Strategic High Yield Tax-Free 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	0.41%
Distribution/service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Interest expense	rr_Component1OtherExpensesOverAssets	0.03%
Other expenses	rr_Component3OtherExpensesOverAssets	0.24%
Total other expenses	rr_OtherExpensesOverAssets	0.27%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.68%
Fee waiver/expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.05%
Total annual fund operating expenses after fee waiver/expense reimbursement	rr_NetExpensesOverAssets	0.63%
1 Year	rr_ExpenseExampleYear01	$ 64
3 Years	rr_ExpenseExampleYear03	213
5 Years	rr_ExpenseExampleYear05	374
10 Years	rr_ExpenseExampleYear10	842
1 Year	rr_ExpenseExampleNoRedemptionYear01	64
3 Years	rr_ExpenseExampleNoRedemptionYear03	213
5 Years	rr_ExpenseExampleNoRedemptionYear05	374
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 842
Class ACIS | DWS Strategic High Yield Tax-Free 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	0.41%
Distribution/service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Interest expense	rr_Component1OtherExpensesOverAssets	0.03%
Other expenses	rr_Component3OtherExpensesOverAssets	0.30%
Total other expenses	rr_OtherExpensesOverAssets	0.33%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.74%
Fee waiver/expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	0.11%
Total annual fund operating expenses after fee waiver/expense reimbursement	rr_NetExpensesOverAssets	0.63%
1 Year	rr_ExpenseExampleYear01	$ 64
3 Years	rr_ExpenseExampleYear03	226
5 Years	rr_ExpenseExampleYear05	401
10 Years	rr_ExpenseExampleYear10	908
1 Year	rr_ExpenseExampleNoRedemptionYear01	64
3 Years	rr_ExpenseExampleNoRedemptionYear03	226
5 Years	rr_ExpenseExampleNoRedemptionYear05	401
10 Years	rr_ExpenseExampleNoRedemptionYear10	$ 908
Class ACIS | DWS Strategic High Yield Tax-Free Fund | before tax | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	2.90%
5 Years	rr_AverageAnnualReturnYear05	4.11%
10 Years	rr_AverageAnnualReturnYear10	4.17%
Class Inception	rr_AverageAnnualReturnInceptionDate	May 01, 2000
Class ACIS | DWS Strategic High Yield Tax-Free Fund | before tax | Class C
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	5.01%
5 Years	rr_AverageAnnualReturnYear05	3.90%
10 Years	rr_AverageAnnualReturnYear10	3.68%
Class Inception	rr_AverageAnnualReturnInceptionDate	May 01, 2000
Class ACIS | DWS Strategic High Yield Tax-Free Fund | before tax | INST Class
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	5.98%
5 Years	rr_AverageAnnualReturnYear05	4.94%
10 Years	rr_AverageAnnualReturnYear10	4.72%
Class Inception	rr_AverageAnnualReturnInceptionDate	Aug. 19, 2002
Class ACIS | DWS Strategic High Yield Tax-Free Fund | before tax | Class S
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	6.07%
5 Years	rr_AverageAnnualReturnYear05	4.93%
10 Years	rr_AverageAnnualReturnYear10	4.72%
Class Inception	rr_AverageAnnualReturnInceptionDate	Jan. 22, 1987
Class ACIS | DWS Strategic High Yield Tax-Free Fund | After tax on distributions | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	1.49%
5 Years	rr_AverageAnnualReturnYear05	2.97%
10 Years	rr_AverageAnnualReturnYear10	2.92%
Class ACIS | DWS Strategic High Yield Tax-Free Fund | After tax on distributions and sale of fund shares | Class A
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	1.54%
5 Years	rr_AverageAnnualReturnYear05	2.85%
10 Years	rr_AverageAnnualReturnYear10	2.89%
Class ACIS | DWS Strategic High Yield Tax-Free Fund | Bloomberg Municipal Bond Index (reflects no deduction for fees, expenses or taxes)
Risk Return Abstract	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	1.52%
5 Years	rr_AverageAnnualReturnYear05	4.17%
10 Years	rr_AverageAnnualReturnYear10	3.72%

[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 1.00% if redeemed within 12 months of the original purchase date.