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Risk Return Abstract rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName NATIONWIDE MUTUAL FUNDS
Prospectus Date rr_ProspectusDate Feb. 28, 2025
Nationwide BNY Mellon Dynamic US Equity Income Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Fund Summary: Nationwide BNY Mellon Dynamic U.S. Equity Income Fund
Objective [Heading] rr_ObjectiveHeading <span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;">Objective</span>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Nationwide BNY Mellon Dynamic U.S. Equity Income Fund seeks total return, consisting of capital appreciation and/or income.
Expense [Heading] rr_ExpenseHeading <span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;">Fees and Expenses</span>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. 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 if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund. More information about these and other discounts is available from your financial professional and in “Investing with Nationwide Funds” commencing on page 78 of this Prospectus and in “Additional Information on Purchases and Sales” commencing on page 95 of the Statement of Additional Information. In addition, if you purchase shares through a specific intermediary, you may be subject to different sales charges including reductions in or waivers of such charges. More information about these intermediary-specific sales charge variations is available in Appendix A to the Fund’s Prospectus.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Shareholder Fees </span><span style="color:#000000;font-family:Arial;font-size:10pt;">(fees paid directly from your investment)</span>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Annual Fund Operating Expenses </span><span style="color:#000000;font-family:Arial;font-size:10pt;">(expenses that you pay each year as a percentage 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:8pt;">February 28, 2026</span>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;">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 rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 77.00% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 77.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts <span style="color:#000000;font-family:Arial;font-size:10pt;">You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at </span><span style="color:#000000;font-family:Arial;font-size:10pt;">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 the Fund. </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:12pt;font-weight:bold;">Example</span>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock This Example is intended to help you to 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 sell all of your shares at the end of those time periods. It assumes a 5% return each year and no change in expenses, and any expense limitation or fee waivers that may apply for the periods indicated above under “Fees and Expenses.” Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading <span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;">Principal Investment Strategies</span>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock The Fund seeks to provide investors with total return, consisting of capital appreciation and/or income, by outperforming the Russell 1000® Value Index over a full market cycle while maintaining a similar level of market risk as the index. To achieve this goal, the Fund’s subadviser seeks to identify and construct the most optimal portfolio that targets an equity-like level of volatility by allocating assets among equity securities, money market instruments, futures contracts the value of which are derived from the performance of equity indexes and U.S. Treasury bonds (which are government-issued fixed income securities), and options on equity index and U.S. Treasury bond futures. Futures and options are derivatives and expose the Fund to leverage. In addition, the Fund may write (sell) covered call options to enhance returns and/or to limit volatility. Investors in the Fund should have a long-term perspective and be able to tolerate potentially sharp declines in value. The Fund invests, under normal circumstances, at least 80% of its net assets in equity securities of U.S. issuers, primarily common stocks. Equity securities represent an ownership interest in the issuer. Equity securities also may include preferred stocks, convertible securities and derivatives the value of which are linked to equity securities. The Fund also may invest up to 20% of its net assets in equity securities of foreign companies, which are companies organized under the laws of countries other than the United States. Although the Fund typically invests in seasoned issuers, it may, depending on the appropriateness to the Fund's strategy and availability in the marketplace, purchase securities of companies in initial public offerings (IPOs) or shortly thereafter, which can be subject to greater volatility than seasoned issuers. The subadviser’s investment process is designed to provide investors with investment exposure to sector weightings and risk characteristics generally similar to those of the Russell 1000® Value Index, although the Fund may emphasize one or more particular sectors at times. The Fund’s subadviser employs a value style of investing, focusing on dividend-paying stocks and other investments and investment techniques that provide income. The subadviser identifies potential investments through extensive quantitative and fundamental analysis, using a bottom-up approach that emphasizes three key factors: ●Value: quantitative screens track traditional measures, such as price-to-earnings, price-to-book and price-to-sales ratios, which are analyzed and compared against the market; ●Sound business fundamentals: a company's balance sheet and income data are examined to determine the company's financial history; and ●Positive business momentum: a company's earnings and forecast changes are analyzed and sales and earnings trends are reviewed to determine the company's financial condition or the presence of a catalyst that will trigger a price increase near- to mid-term. Money market instruments primarily serve as “cover” for the Fund’s derivatives positions, although the subadviser also at times allocates assets to money market instruments in order to hedge against equity market risk. Money market instruments are high-quality short-term debt securities issued by governments and corporations. The Fund obtains exposure to U.S. Treasury bonds by purchasing futures contracts on U.S. Treasury bonds included in the Bloomberg U.S. Long Treasury Index. The Fund also may purchase options on U.S. Treasury bond futures contracts. The Fund uses U.S. Treasury bond futures and options to hedge against equity market risks. It is possible, however, that the Fund could lose money on both its equity investments and its bond exposures at the same time. In determining what the subadviser believes to be the optimal allocation among equities, U.S. Treasury bonds and money market instruments, the subadviser uses estimates of future returns and volatility. When the subadviser believes that equity markets appear favorable, it uses leverage generated by futures and options to increase the Fund’s equity exposure. When equity markets appear to be unfavorable, the subadviser reduces the Fund’s equity exposure through the use of equity index futures and related options. It also may allocate assets to U.S. Treasury bond futures and related options and/or money market instruments. By combining equity securities, futures on stock indexes and U.S. Treasury bonds, call options and money market instruments in varying amounts, the subadviser adjusts the Fund’s overall equity exposure within a range of 80%–150% of the Fund’s net assets. The subadviser regularly reviews the Fund's investments and will consider selling an investment when the subadviser believes such investment is no longer attractive as a result of price appreciation or a change in risk profile, or because other available investments are considered to be more attractive. The Fund is designed for investors seeking total return consisting of capital appreciation and/or income, by investing in a portfolio of equity and debt securities, and derivatives with investment characteristics similar to equity and debt securities, in order to achieve enhanced equity returns while maintaining a level of volatility risk that is similar to the Russell 1000® Value Index.
Risk [Heading] rr_RiskHeading <span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;">Principal Risks</span>
Risk [Text Block] rr_RiskTextBlock The Fund cannot guarantee that it will achieve its investment objective. As with any fund, the value of the Fund’s investments—and therefore, the value of Fund shares—may fluctuate. These changes may occur because of:Loss of money is a risk of investing in the Fund. 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 government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <span style="color:#000000;font-family:Arial;font-size:12pt;font-weight:bold;">Performance</span>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The Fund's performance prior to December 21, 2020 reflects returns pursuant to different principal investment strategies. If the Fund's current strategies had been in place during the prior period, the performance information shown would have been different.
The Fund has adopted the historical performance of the BNY Mellon Disciplined Stock Fund, a former series of BNY Mellon Investment Funds IV, Inc. (the “Predecessor Fund”) as the result of a reorganization in which the Fund acquired all of the assets, subject to liabilities, of the Predecessor Fund on December 16, 2019. The returns presented for periods prior to December 16, 2019 reflect the performance of the Predecessor Fund. At the time of the reorganization, the Fund and the Predecessor Fund had similar investment goals, although the Fund and the Predecessor Fund had different investment objectives. Further, while the Fund and the Predecessor Fund shared some investment strategies and policies, certain of the Fund's investment strategies and policies were different from those of the Predecessor Fund. The following bar chart and table can help you evaluate the Fund’s potential risks. The bar chart shows how the Fund’s annual total returns have varied from year to year. These returns do not reflect the impact of sales charges. If sales charges were included, the annual total returns would be lower than those shown. The table compares the Fund’s average annual total returns to the returns of a broad-based securities market index and an additional index. The additional index has characteristics relevant to the Fund’s investment strategy. Remember, however, that past performance (before and after taxes) is not necessarily indicative of how the Fund will perform in the future.Updated performance information is available at no cost by visiting nationwide.com/mutualfunds or by calling 800-848-0920. Sales charges are not reflected in the bar chart, and if those charges were included, returns would be less than those shown. The Fund has begun comparing its performance to the Russell 1000 Index to satisfy a new Securities and Exchange Commission (SEC) disclosure requirement.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns <span style="font-family:Arial;font-size:10pt;">The bar chart shows how the Fund’s </span><span style="font-family:Arial;font-size:10pt;">annual total returns have varied from year to year. </span><span style="font-family:Arial;font-size:10pt;">These </span><span style="font-family:Arial;font-size:10pt;">returns do not reflect the impact of sales charges. If sales charges were included, the annual total returns would be lower than those shown.</span><span style="font-family:Arial;font-size:10pt;"> The table compares the Fund’s </span><span style="font-family:Arial;font-size:10pt;">average annual total returns to the returns of a broad-based securities market index and an additional index.</span><span style="font-family:Arial;font-size:10pt;line-height:12pt;"> </span><span style="font-family:Arial;font-size:10pt;">The additional index has characteristics relevant to the Fund’s investment strategy</span>
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone <span style="font-family:Arial;font-size:10pt;">800-848-0920</span>
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress <span style="font-family:Arial;font-size:10pt;">nationwide.com/mutualfunds</span>
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture <span style="font-family:Arial;font-size:10pt;">Remember, however, that past performance (before and after taxes) is not necessarily indicative of how the Fund will perform in the future.</span>
Bar Chart [Heading] rr_BarChartHeading <span style="font-family:Arial;font-size:10pt;font-weight:bold;">Annual Total Returns</span><span style="font-family:Arial;font-size:10pt;font-weight:bold;margin-left:2.5pt;">– Class K Shares</span><br/><span style="font-family:Arial;font-size:10pt;font-weight:bold;">(Years Ended December 31,)</span>
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads <span style="font-family:Arial;font-size:10pt;">These </span><span style="font-family:Arial;font-size:10pt;">returns do not reflect the impact of sales charges. If sales charges were included, the annual total returns would be lower than those shown.</span>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock Highest Quarter:20.72%–4Q 2020Lowest Quarter:-31.34%–1Q 2020
Performance Table Heading rr_PerformanceTableHeading <span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">Average Annual Total Returns</span> <br/><span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;">(For the Periods Ended December 31, 2023)</span>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate <span style="color:#000000;font-family:Arial;font-size:10pt;">After-tax returns are calculated using </span><span style="color:#000000;font-family:Arial;font-size:10pt;">the historical highest individual federal marginal income tax rates and do not reflect state and 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 </span><span style="color:#000000;font-family:Arial;font-size:10pt;">not relevant to investors in tax-advantaged arrangements, such as individual retirement accounts, 401(k) plans or certain other employer-sponsored retirement plans.</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 are shown for Class K shares only and will vary for other classes. </span>
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock After-tax returns are shown for Class K shares only and will vary for other classes. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect state and local taxes. Your actual after-tax return depends on your personal tax situation and may differ from what is shown here. After-tax returns are not relevant to investors in tax-advantaged arrangements, such as individual retirement accounts, 401(k) plans or certain other employer-sponsored retirement plans.Historical performance for Class K shares is based on the previous performance of the Predecessor Fund’s Shares. The inception date for Class A, Class R6, Institutional Service Class and Eagle Class shares is December 16, 2019. Therefore, pre-inception historical performance for Class A, Class R6, Institutional Service Class and Eagle Class shares is based on the previous performance of Predecessor Fund’s Shares. Performance for Class A shares has been adjusted to reflect sales charges and the higher expenses of Class A shares than those of the Predecessor Fund’s Shares. Performance for Class K, Class R6, Institutional Service Class and Eagle Class shares has not been adjusted to reflect each share class’s lower expenses than those of the Predecessor Fund’s Shares.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Risk Lose Money [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Loss of money is a risk of investing in the Fund.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Equity Securities Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Equity securities risk – stock markets are volatile. The price of an equity security fluctuates based on changes in a company’s financial condition and overall market and economic conditions.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Leverage Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Leverage risk – leverage risk is a direct risk of investing in the Fund. Leverage is investment exposure that exceeds the initial amount invested. Derivatives and other transactions that give rise to leverage may cause the Fund’s performance to be more volatile than if the Fund had not been leveraged. Leveraging also may require that the Fund liquidate portfolio securities when it may not be advantageous to do so to satisfy its obligations. Certain derivatives provide the potential for investment gain or loss that may be several times greater than the change in the value of an underlying security, asset, interest rate, index or currency, resulting in the potential for a loss that may be substantially greater than the amount invested. Some leveraged investments have the potential for unlimited loss, regardless of the size of the initial investment.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Derivatives Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Derivatives risk – derivatives may be volatile and may involve significant risks. The underlying security, measure or other instrument on which a derivative is based, or the derivative itself, may not perform as expected. Futures contracts and options on futures contracts typically involve leverage, which means that their use can significantly magnify the effect of price movements of the underlying securities or reference measures, disproportionately increasing the Fund’s losses and reducing the Fund’s opportunities for gains. Some of these derivatives have the potential for unlimited loss, including a loss that may be greater than the amount invested. Certain futures contracts and related options may be illiquid, making it difficult to close out an unfavorable position. Finally, the Fund's use of derivatives may cause a Fund to realize higher amounts of short-term capital gains (generally taxed at ordinary income tax rates) than if the Fund had not used such instruments.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Futures [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Futures – the prices of futures contracts typically are more volatile than those of stocks and bonds. Small movements in the values of the assets or measures of underlying futures contracts can cause disproportionately larger losses to the Fund. While futures may be more liquid than other types of derivatives, they may experience periods when they are less liquid than stocks, bonds or other investments.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Options [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Options – purchasing and selling options are highly specialized activities and entail greater-than-ordinary investment risks. The ability to close out positions in exchange-traded options depends on the existence of a liquid market. Options that expire unexercised have no value.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Market Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Market risk – the risk that one or more markets in which the Fund invests will go down in value, including the possibility that the markets will go down sharply and unpredictably. This occurs due to numerous factors, including interest rates, the outlook for corporate profits, the health of the national and world economies, and the fluctuation of other securities markets around the world. These risks may be magnified if certain social, political, economic and other conditions and events (such as natural disasters, epidemics and pandemics, terrorism, conflicts and social unrest or rapid technological developments such as artificial intelligence) adversely interrupt the global economy.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Selection Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Selection risk – the risk that the securities selected by the Fund’s subadviser will underperform the markets, the relevant indexes or the securities selected by other funds with similar investment objectives and investment strategies.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Strategy Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Strategy risk – the subadviser’s strategy may cause the Fund to experience above-average short-term volatility. Accordingly, the Fund may be appropriate for investors who have a long investment time horizon and who seek long-term total return while accepting the possibility of significant short-term, or even long-term, losses.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Foreign Securities Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Foreign securities risk – foreign securities often are more volatile, harder to price and less liquid than U.S. securities. The prices of foreign securities may be further affected by other factors, such as changes in the exchange rates between the U.S. dollar and the currencies in which the securities are traded.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Value Style Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Value style risk – value investing carries the risk that the market will not recognize a security’s intrinsic value for a long time or that a stock judged to be undervalued actually is appropriately priced. In addition, value stocks as a group sometimes are out of favor and underperform the overall equity market for long periods while the market concentrates on other types of stocks, such as “growth” stocks.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Dividend Paying Stock Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Dividend-paying stock risk – there is no guarantee that the issuers of the stocks held by the Fund will declare dividends in the future or that, if dividends are declared, they will remain at their current levels or increase over time. The Fund’s emphasis on dividend-paying stocks could cause the Fund to underperform similar funds that invest without consideration of a company’s track record of paying dividends or ability to pay dividends in the future. Dividend-paying stocks may not participate in a broad market advance to the same degree as other stocks, and a sharp rise in interest rates or economic downturn could cause a company to unexpectedly reduce or eliminate its dividend.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Convertible Securities Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Convertible securities risk - the values of convertible securities typically fall when interest rates rise and increase when interest rates fall. The prices of convertible securities with longer maturities tend to be more volatile than those with shorter maturities. Value also tends to change whenever the market value of the underlying common or preferred stock fluctuates. The Fund will lose money if the issuer of a convertible security is unable to meet its financial obligations.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Preferred Stock Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Preferred stock risk – a preferred stock may decline in price, or fail to pay dividends when expected, because the issuer experiences a decline in its financial status. Preferred stocks often behave like debt securities, but have a lower payment priority than the issuer’s bonds or other debt securities. Therefore, they are subject to greater credit risk than those of debt securities. Preferred stocks also may be significantly less liquid than many other securities, such as corporate debt or common stock.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Initial Public Offering Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Initial public offering risk – availability of IPOs may be limited and the Fund may not be able to buy any shares at the offering price, or may not be able to buy as many shares at the offering price as it would like, which may adversely impact Fund performance. Further, IPO prices often are subject to greater and more unpredictable price changes than more established stocks.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Sector Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Sector risk – investments in particular industries or sectors may be more volatile than the overall stock market. Therefore, if the Fund emphasizes one or more industries or economic sectors, it will be more susceptible to financial, market or economic events affecting the particular issuers and industries participating in such sectors than funds that do not emphasize particular industries or sectors.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Fixed Income Securities Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Fixed-income securities risk – investments in fixed-income securities, such as bonds, subject the Fund to interest rate risk, credit risk and prepayment and call risk, which may affect the value of your investment. Interest rate risk is the risk that the value of fixed-income securities will decline when interest rates rise. Prices of longer-term securities generally change more in response to interest rate changes than prices of shorter-term securities. To the extent the Fund invests a substantial portion of its assets in debt securities with longer-term maturities, rising interest rates are more likely to cause periods of increased volatility and redemptions, and may cause the value of the Fund’s investments to decline significantly. The Federal Reserve Board recently lowered interest rates following a period of consistent rate increases, though it is unclear if such lowering will continue. The interest earned on the Fund's investments in fixed-income securities may decline when prevailing interest rates fall. Declines in interest rates increase the likelihood that debt obligations will be pre-paid, which, in turn, increases these risks. The Fund is subject to the risk that the income generated by its investments in fixed-income securities will not keep pace with inflation. Recent and potential future changes in government policy may affect interest rates. Credit risk is the risk that the issuer of a bond may default if it is unable to pay interest or principal when due. If an issuer defaults, the Fund will lose money. Changes in a bond issuer’s credit rating or the market’s perceptions of an issuer’s creditworthiness also may affect the value of a bond. Prepayment and call risk is the risk that certain debt securities will be paid off by the issuer more quickly than anticipated. If this occurs, the Fund may be required to invest the proceeds in securities with lower yields.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Liquidity Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Liquidity risk – when there is little or no active trading market for specific types of securities or instruments, it can become more difficult to sell the securities or instruments at or near their perceived value. An inability to sell a portfolio position can adversely affect the Fund's value or prevent the Fund from being able to take advantage of other investment opportunities. Liquidity risk also includes the risk that the Fund will experience significant net redemptions of its shares at a time when it cannot find willing buyers for its portfolio securities or instruments or can sell its portfolio securities or instruments only at a material loss. To meet redemption requests, the Fund may be forced to sell other securities or instruments that are more liquid, but at unfavorable times and conditions.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Cash Position Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Cash position risk – the Fund may hold significant positions in cash or money market instruments. A larger amount of such holdings will cause the Fund to miss investment opportunities presented during periods of rising market prices.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Quantitative Analysis Strategy Risk [Member]  
Risk Return Abstract rr_RiskReturnAbstract  
Risk [Text Block] rr_RiskTextBlock Quantitative analysis strategy risk – the success of the Fund's investment strategy depends in part on the effectiveness of the subadviser's quantitative tools for screening securities. These strategies may incorporate factors that are not predictive of a security's value. Additionally, a previously successful strategy may become outdated or inaccurate, possibly resulting in losses.
Nationwide BNY Mellon Dynamic US Equity Income Fund | Class A Shares  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.35%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.20%
Fee Waiver/Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [1]
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement rr_NetExpensesOverAssets 1.10%
1 Year rr_ExpenseExampleYear01 $ 681
3 Years rr_ExpenseExampleYear03 925
5 Years rr_ExpenseExampleYear05 1,188
10 Years rr_ExpenseExampleYear10 $ 1,938
2015 rr_AnnualReturn2015 2.63%
2016 rr_AnnualReturn2016 11.98%
2017 rr_AnnualReturn2017 19.06%
2018 rr_AnnualReturn2018 (5.43%)
2019 rr_AnnualReturn2019 28.32%
2020 rr_AnnualReturn2020 2.57%
2021 rr_AnnualReturn2021 34.45%
Annual Return 2022 rr_AnnualReturn2022 (0.89%)
Annual Return 2023 rr_AnnualReturn2023 8.72%
Annual Return 2024 rr_AnnualReturn2024 15.29%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel <span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.0pt;">Highest Quarter:</span>
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Dec. 31, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 20.72%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel <span style="color:#000000;font-family:Arial;font-size:10pt;font-weight:bold;margin-left:0.0pt;">Lowest Quarter:</span>
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (31.34%)
1 Year rr_AverageAnnualReturnYear01 8.50%
5 Years rr_AverageAnnualReturnYear05 9.83%
10 Years rr_AverageAnnualReturnYear10 10.03%
Nationwide BNY Mellon Dynamic US Equity Income Fund | Class K Shares  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.10%
Other Expenses rr_OtherExpensesOverAssets 0.10%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.80%
Fee Waiver/Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [1]
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement rr_NetExpensesOverAssets 0.70%
1 Year rr_ExpenseExampleYear01 $ 72
3 Years rr_ExpenseExampleYear03 245
5 Years rr_ExpenseExampleYear05 434
10 Years rr_ExpenseExampleYear10 $ 980
1 Year rr_AverageAnnualReturnYear01 15.29%
5 Years rr_AverageAnnualReturnYear05 11.37%
10 Years rr_AverageAnnualReturnYear10 11.02%
Nationwide BNY Mellon Dynamic US Equity Income Fund | Class R6 Shares  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.10%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.70%
Fee Waiver/Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [1]
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement rr_NetExpensesOverAssets 0.60%
1 Year rr_ExpenseExampleYear01 $ 61
3 Years rr_ExpenseExampleYear03 214
5 Years rr_ExpenseExampleYear05 380
10 Years rr_ExpenseExampleYear10 $ 861
1 Year rr_AverageAnnualReturnYear01 15.45%
5 Years rr_AverageAnnualReturnYear05 11.48%
10 Years rr_AverageAnnualReturnYear10 11.08%
Nationwide BNY Mellon Dynamic US Equity Income Fund | Institutional Service Class Shares  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.35%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.95%
Fee Waiver/Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [1]
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement rr_NetExpensesOverAssets 0.85%
1 Year rr_ExpenseExampleYear01 $ 87
3 Years rr_ExpenseExampleYear03 293
5 Years rr_ExpenseExampleYear05 516
10 Years rr_ExpenseExampleYear10 $ 1,157
1 Year rr_AverageAnnualReturnYear01 15.34%
5 Years rr_AverageAnnualReturnYear05 11.39%
10 Years rr_AverageAnnualReturnYear10 11.03%
Nationwide BNY Mellon Dynamic US Equity Income Fund | Eagle Class Shares  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) imposed on purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Management Fees rr_ManagementFeesOverAssets 0.60%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.20%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.80%
Fee Waiver/Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.10%) [1]
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement rr_NetExpensesOverAssets 0.70%
1 Year rr_ExpenseExampleYear01 $ 72
3 Years rr_ExpenseExampleYear03 245
5 Years rr_ExpenseExampleYear05 434
10 Years rr_ExpenseExampleYear10 $ 980
1 Year rr_AverageAnnualReturnYear01 15.43%
5 Years rr_AverageAnnualReturnYear05 11.45%
10 Years rr_AverageAnnualReturnYear10 11.06%
Nationwide BNY Mellon Dynamic US Equity Income Fund | After Taxes on Distributions | Class K Shares  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 10.53%
5 Years rr_AverageAnnualReturnYear05 8.16%
10 Years rr_AverageAnnualReturnYear10 7.86%
Nationwide BNY Mellon Dynamic US Equity Income Fund | After Taxes on Distributions and Sales of Shares | Class K Shares  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 11.15%
5 Years rr_AverageAnnualReturnYear05 8.25%
10 Years rr_AverageAnnualReturnYear10 7.90%
Nationwide BNY Mellon Dynamic US Equity Income Fund | Russell 1000® Index (The Index does not pay sales charges, fees, expenses or taxes.)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 24.51%
5 Years rr_AverageAnnualReturnYear05 14.28%
10 Years rr_AverageAnnualReturnYear10 12.87%
Nationwide BNY Mellon Dynamic US Equity Income Fund | Russell 1000® Value Index (The Index does not pay sales charges, fees, expenses or taxes.)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 14.37%
5 Years rr_AverageAnnualReturnYear05 8.68%
10 Years rr_AverageAnnualReturnYear10 8.49%
[1] Nationwide Mutual Funds (the “Trust”) and Nationwide Fund Advisors (the “Adviser”) have entered into a written contract limiting annual fund operating expenses to 0.60% until at least February 28, 2026. Under the expense limitation agreement, the level to which operating expenses are limited applies to all share classes, excluding any taxes, interest, compensation payable to parties not affiliated with the Adviser for the recovery of tax reclaims, brokerage commissions, Rule 12b-1 fees, acquired fund fees and expenses, short-sale dividend expenses, administrative services fees, other expenses which are capitalized in accordance with generally accepted accounting principles and expenses incurred by the Fund in connection with any merger or reorganization, and may exclude other nonroutine expenses not incurred in the ordinary course of the Fund’s business. The expense limitation agreement may be changed or eliminated only with the consent of the Board of Trustees of the Trust. The Adviser may request and receive reimbursement from the Fund for advisory fees waived or other expenses reimbursed by the Adviser pursuant to the expense limitation agreement at a date not to exceed three years from the date in which the corresponding waiver or reimbursement to the Fund was made. However, no reimbursement may be made unless: (i) the Fund’s assets exceed $100 million and (ii) the total annual expense ratio of the class making such reimbursement is no higher than the amount of the expense limitation that was in place at the time the Adviser waived the fees or reimbursed the expenses and does not cause the expense ratio to exceed the current expense limitation. Reimbursement by the Fund of amounts previously waived or reimbursed by the Adviser is not permitted except as provided for in the expense limitation agreement.