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Risk Return Abstract rr_RiskReturnAbstract  
Registrant Name dei_EntityRegistrantName FEDERATED HERMES FIXED INCOME SECURITIES INC
Prospectus Date rr_ProspectusDate Jan. 31, 2022
Federated Hermes Strategic Income Fund  
Risk Return Abstract rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading <span style="color:#000000;font-family:Times New Roman;font-size:14pt;">Fund Summary Information </span><span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Federated Hermes Strategic Income Fund (the “Fund”)</span>
Objective [Heading] rr_ObjectiveHeading <span style="color:#000000;font-family:Arial;font-size:8pt;font-weight:bold;text-transform:uppercase;">RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE</span>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Fund’s investment objective is to seek a high level of current income.
Expense [Heading] rr_ExpenseHeading <span style="color:#000000;font-family:Arial;font-size:8pt;font-weight:bold;text-transform:uppercase;">RISK/RETURN SUMMARY: 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 Class A Shares (A), Class B Shares (B), Class C Shares (C), Class F Shares (F), Institutional Shares (IS) and Class R6 Shares (R6) 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 $100,000, or $1,000,000, in certain classes (e.g., A class and F class, respectively) of Federated Hermes funds. More information about these and other discounts is available from your financial professional, in the “What Do Shares Cost?” section of the Prospectus on page 25 and in “Appendix B” to this Prospectus.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Shareholder Fees (fees paid directly from your investment)</span>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Annual Fund Operating Expenses (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:6.4pt;"> February 1, </span><span style="font-family:Arial;font-size:6.4pt;">2023</span>
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <span style="color:#000000;font-family:Arial;font-size:8.5pt;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 50% of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 50.00%
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts <span style="font-family:Times New Roman;font-size:10pt;"> You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $</span><span style="font-family:Times New Roman;font-size:10pt;">100,000</span><span style="font-family:Times New Roman;font-size:10pt;">, or $1,000,000, in certain classes (e.g., A class and F class, respectively) of Federated Hermes 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:8.5pt;font-weight:bold;">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 for the time periods indicated and then redeem all of your Shares at the end of those periods. Expenses assuming no redemption are also shown. The Example also assumes that your investment has a 5% return each year and that operating expenses (excluding any sales loads on reinvested dividends, fee waivers and/or expense reimbursements) are as shown in the table above and remain the same. The expenses used to calculate the Fund’s examples do not include fee waivers or expense reimbursements. Although your actual costs and returns 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:8pt;font-weight:bold;text-transform:uppercase;">RISK/RETURN SUMMARY: INVESTMENTS, RISKS and PERFORMANCE </span><span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">What are the Fund’s Main Investment Strategies?</span>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock The Fund allocates the portfolio of investments among the following three categories of the fixed-income market: domestic investment-grade (including, but not limited to, U.S. government, asset-backed, mortgage-backed (MBS), corporate and municipal), domestic noninvestment-grade (including, but not limited to, corporate debt issues (also known as junk bonds and leveraged loans), MBS and municipal securities) and foreign investments (both investment-grade and noninvestment-grade, including, but not limited to, government and corporate investments traded in both emerging and developed markets, and trade finance). Based upon historical returns, the Fund’s investment adviser (the “Adviser”) expects the three categories of investments to have different returns and risks under similar market conditions. The Adviser relies on the differences in the expected performance of each category to manage risks by allocating the Fund’s portfolio among the three categories. The Adviser seeks to enhance the Fund’s performance by allocating more of its portfolio to the category that the Adviser expects to offer the best balance between risk and return. While the Fund’s portfolio usually includes securities from all three categories, the Fund limits the amount that it may invest in a single category up to 60% of its assets, except for the domestic investment-grade category, in which the Fund may invest up to 75% of its assets.In addition, when the Adviser considers the risk/return prospects of equity securities to be attractive, the Fund may also opportunistically invest up to 20% of its assets in equity securities of all market capitalizations, including small capitalization companies. These equity securities may include common stocks, preferred stocks, warrants, convertible securities, and pooled investment vehicles such as exchange-traded funds (ETFs) or other investment companies. Pooled vehicles may be utilized in order to gain broad exposure to the equity market.When selecting investments for the Fund, the Fund can invest in securities directly or in other investment companies, including, for example, funds advised by the Adviser or its affiliates (“Underlying Funds”). At times, the Fund’s investment in Underlying Funds may be a substantial portion of the Fund’s portfolio. The Fund may also invest in derivative contracts or hybrid instruments (such as, for example, futures contracts, option contracts, currency derivatives and swap contracts) to implement its investment strategies as more fully described herein. There can be no assurance that the Fund’s use of derivative contracts or hybrid instruments will work as intended. Derivative investments made by the Fund are included within the Fund’s 80% policy, as described below, and are calculated at market value. The Adviser may invest in bonds of any maturity. The Fund may at times use derivative securities to take a position on interest rate moves, credit market moves, equity market moves and currency moves.Certain of the government securities in which the Fund invests are not backed by the full faith and credit of the U.S. government, such as those issued by the Federal Home Loan Mortgage Corporation (“Freddie Mac”), the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Bank System. These entities are, however, supported through federal subsidies, loans or other benefits. The Fund may also invest in government securities that are supported by the full faith and credit of the U.S. government, such as those issued by the Government National Mortgage Association (“Ginnie Mae”). Finally, the Fund may invest, to a limited extent, in government securities that are issued by entities whose activities are sponsored by the federal government but that have no explicit financial support.The Fund will invest its assets so that at least 80% of its net assets (plus any borrowings for investment purposes) are invested in fixed-income investments. The Fund will notify shareholders at least 60 days in advance of any change in its investment policy that would enable the Fund to invest, under normal circumstances, less than 80% of its net assets in fixed-income investments.
Risk [Heading] rr_RiskHeading <span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">What are the Main Risks of Investing in the Fund?</span>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund. The primary factors that may reduce the Fund’s returns include:■ Underlying Fund Risk. The risk that the Fund’s performance is closely related to the risks associated with the securities and other investments held by underlying funds and that the ability of a Fund to achieve its investment objective will depend upon the ability of underlying funds to achieve their respective investment objectives. The Fund bears Underlying Fund fees and expenses indirectly.■ Interest Rate Risk. Prices of fixed-income securities (including tax-exempt securities) generally fall when interest rates rise. The longer the duration of a fixed-income security, the more susceptible it is to interest rate risk. Recent and potential future changes in monetary policy made by central banks and/or their governments are likely to affect the level of interest rates.■ Prepayment and Extension Risk. When homeowners prepay their mortgages in response to lower interest rates, the Fund may be required to reinvest the proceeds at the lower interest rates then available. Also, when interest rates fall, the price of mortgage-backed securities may not rise to as great an extent as other fixed-income securities. When interest rates rise, homeowners are less likely to prepay their mortgages. A decreased rate of prepayments lengthens the expected maturity of a mortgage-backed security, and the price of mortgage-backed securities may decrease more than the price of other fixed income securities when interest rates rise.■ Call Risk. Call risk is the possibility that an issuer may redeem a fixed-income security before maturity (a “call”) at a price below its current market price. An increase in the likelihood of a call may reduce the security’s price.■ Credit Risk. It is possible that interest or principal on securities will not be paid when due. Noninvestment-grade securities generally have a higher default risk than investment-grade securities. Such non-payments or default may reduce the value of the Fund’s portfolio holdings, its share price and its performance.■ Counterparty Risk. Counterparty risk includes the possibility that a party to a transaction involving the Fund will fail to meet its obligations. This could cause the Fund to lose money or to lose the benefit of the transaction or prevent the Fund from selling or buying other securities to implement its investment strategy.■ Risk Associated with Noninvestment-Grade Securities. Securities rated below investment grade may be subject to greater interest rate, credit and liquidity risks than investment-grade securities. These securities are considered speculative with respect to the issuer’s ability to pay interest and repay principal.■ Risk Related to the Economy. The value of the Fund’s portfolio may decline in tandem with a drop in the overall value of the markets in which the Fund invests and/or other markets. Economic, political and financial conditions, industry or economic trends and developments or public health risks, such as epidemics or pandemics, may, from time to time, and for varying periods of time, cause the Fund to experience volatility, illiquidity, shareholder redemptions, or other potentially adverse effects. Among other investments, lower-grade bonds and loans may be particularly sensitive to changes in the economy.■ Currency Risk. Exchange rates for currencies fluctuate daily. Accordingly, the Fund may experience increased volatility with respect to the value of its Shares and its returns as a result of its exposure to foreign currencies through direct holding of such currencies or holding of non-U.S. dollar denominated securities.■ European Union and Eurozone Related Risk. A number of countries in the European Union (EU), including certain countries within the EU that have adopted the euro (Eurozone), have experienced, and may continue to experience, severe economic and financial difficulties. Additional countries within the EU may also fall subject to such difficulties. These events could negatively affect the value and liquidity of the Fund’s investments in euro-denominated securities and derivatives contracts, securities of issuers located in the EU or with significant exposure to EU issuers or countries.■ Risk of Foreign Investing. Because the Fund invests in securities issued by foreign companies or national governments, the Fund’s Share price may be more affected by foreign economic and political conditions, taxation policies and accounting and auditing standards than would otherwise be the case.■ Risk of Investing in Emerging Market Countries. Securities issued or traded in emerging markets, including frontier markets, generally entail greater risks than securities issued or traded in developed markets. Emerging market economies may also experience more severe downturns (with corresponding currency devaluations) than developed economies. These same risks exist and may be greater in frontier markets.■ Liquidity Risk. Certain securities in which the Fund invests may be less readily marketable and may be subject to greater fluctuation in price than other securities. These features may make it more difficult to sell or buy a security at a favorable price or time. Noninvestment-grade securities generally have less liquidity than investment-grade securities. Liquidity risk also refers to the possibility that the Fund may not be able to sell a security or close out a derivative contract when it wants to. Over-the-counter derivative contracts generally carry greater liquidity risk than exchange-traded contracts.■ Leverage Risk. Leverage risk is created when an investment, which includes for example, an investment in a derivative contract, exposes the Fund to a level of risk that exceeds the amount invested. Changes in the value of such an investment magnify the Fund’s risk of loss and potential for gain.■ Tax-Exempt Securities Risk. The amount of public information available about tax-exempt securities is generally less than for corporate equities or bonds. The secondary market for tax-exempt securities also tends to be less well-developed and less liquid than many other securities markets, which may limit the Fund’s ability to sell its tax-exempt securities at attractive prices. Special factors, such as legislative changes, and state and local economic and business developments, may adversely affect the yield and/or value of the Fund’s investments in tax-exempt securities. Tax-exempt issuers can and have defaulted on obligations, been downgraded or commenced insolvency proceedings. Like other issuers and securities, the likelihood that the credit risk associated with such issuers and such securities will increase is greater during times of economic stress and financial instability.■ Asset-Backed Securities (ABS) Risk. The value of asset-backed securities (ABS) may be affected by certain factors, such as interest rate risk, credit risk, prepayment risk and the availability of information concerning the pool of underlying assets and its structure. Under certain market conditions, ABS may be less liquid and may be difficult to value. Movements in interest rates (both increases and decreases) may quickly and significantly reduce the value of certain types of ABS. ABS can also be subject to the risk of default on the underlying assets.■ MBS Risk. A rise in interest rates may cause the value of MBS held by the Fund to decline. Certain MBS issued by government sponsored enterprises (GSEs) are not backed by the full faith and credit of the U.S. government. A non-agency MBS is subject to the risk that the value of such security will decline, because the security is not issued or guaranteed as to principal or interest by the U.S. government or a GSE. The Fund’s investments in collateralized mortgage obligations (CMOs) may entail greater market, prepayment and liquidity risks than other MBS.■ Risk of Investing in Inflation-Indexed Securities. As more fully described in this Prospectus, the value of inflation-indexed securities may decline when interest rates rise and inflation declines. Additionally, it is possible that the interest payments on inflation indexed securities may be reduced to the point that there is not any net income to distribute.■ Risk of Investing in Derivative Contracts and Hybrid Instruments. Derivative contracts and hybrid instruments involve risks different from, or possibly greater than, risks associated with investing directly in securities and other traditional investments. Specific risk issues related to the use of such contracts and instruments include valuation and tax issues, increased potential for losses and/or costs to the Fund and a potential reduction in gains to the Fund. Each of these issues is described in greater detail in this Prospectus. Derivative contracts and hybrid instruments may also involve other risks described in this Prospectus, such as interest rate, credit, counterparty, stock market, currency, liquidity and leverage risks.■ Exchange-Traded Funds Risk. An investment in an exchange-traded fund (ETF) generally presents the same primary risks as an investment in a conventional fund (i.e., one that is not exchange-traded) that has the same investment objectives, strategies and policies. The price of an ETF can fluctuate up or down, and the Fund could lose money investing in an ETF if the prices of the securities owned by the ETF go down.■ Sector Risk. Companies with similar characteristics may be grouped together in broad categories called sectors. Sector risk is the possibility that a certain sector may underperform other sectors or the market as a whole. As the Adviser allocates more of the Fund’s portfolio holdings to a particular sector, the Fund’s performance will be more susceptible to any economic, business or other developments which generally affect that sector.■ Stock Market Risk. The value of equity securities in the Fund’s portfolio will fluctuate and, as a result, the Fund’s Share price may decline suddenly or over a sustained period of time. Information publicly available about a company, whether from the company’s financial statements or other disclosures or from third parties, or information available to some but not all market participants, can affect the price of a company’s shares in the market. Among other factors, equity securities may decline in value because of an increase in interest rates or changes in the stock market. Recent and potential future changes in industry and/or economic trends, as well as changes in monetary policy made by central banks and/or their governments, also can affect the level of interest rates and contribute to the development of or increase in volatility, illiquidity, shareholder redemptions and other adverse effects (such as a decline in a company’s stock price), which could negatively impact the Fund’s performance.■ Small Cap Company Risk.The Fund may invest in small capitalization (or “small-cap”) companies. Small-cap companies may have less liquid stock, a more volatile share price, unproven track records, a limited product or service base, and limited access to capital. The above factors could make small-cap companies more likely to fail than larger companies, and increase the volatility of the Fund’s portfolio, performance and Share price.■ Risk Related to Investing for Growth.Due to their relatively high valuations, growth stocks are typically more volatile than value stocks. For instance, the price of a growth stock may experience a larger decline on a forecast of lower earnings, a negative fundamental development, or an adverse market development. Further, growth stocks may not pay dividends or may pay lower dividends than value stocks. This means they depend more on price changes for returns and may be more adversely affected in a down market compared to value stocks that pay higher dividends.■ Risk Related to Investing for Value.Due to their relatively low valuations, value stocks are typically less volatile than growth stocks. For instance, the price of a value stock may experience a smaller increase on a forecast of higher earnings, a positive fundamental development or positive market development. Further, value stocks tend to have higher dividends than growth stocks. This means they depend less on price changes for returns and may lag behind growth stocks in an up market.■ LIBOR Risk. The publication of the London Interbank Offered Rate (LIBOR), which many derivatives, debt securities, and other financial instruments in which the Fund may invest, as well as the Fund’s committed, revolving line of credit agreement, utilize or may utilize in the future as the reference or benchmark rate for interest rate calculations, is expected to be discontinued at the end of 2021. The transition process away from LIBOR may lead to increased volatility and illiquidity in markets that currently rely on LIBOR to determine interest rates, and the eventual use of an alternative reference rate may adversely affect the fund’s performance. In addition, the usefulness of LIBOR may deteriorate in the period leading up to its discontinuation, which could adversely affect the liquidity or market value of securities that use LIBOR.■ Technology Risk. The Adviser uses various technologies in managing the Fund, consistent with its investment objective and strategy described in this prospectus. For example, proprietary and third-party data and systems are utilized to support decision making for the Fund. Data imprecision, software or other technology malfunctions, programming inaccuracies and similar circumstances may impair the performance of these systems, which may negatively affect Fund performance.The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.
Risk Lose Money [Text] rr_RiskLoseMoney <span style="color:#000000;font-family:Times New Roman;font-size:10pt;margin-left:10pt;">All mutual funds take investment risks. Therefore, it is possible to lose money by investing in the Fund.</span>
Risk Not Insured [Text] rr_RiskNotInsured <span style="color:#000000;font-family:Times New Roman;font-size:10pt;margin-left:10pt;">The Shares offered by this Prospectus are not deposits or obligations of any bank, are not endorsed or guaranteed by any </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;">bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.</span>
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <span style="color:#000000;font-family:Arial;font-size:8pt;font-weight:bold;text-transform:uppercase;">Performance: Bar Chart and Table </span><span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Risk/Return Bar Chart</span>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you analyze the Fund’s investment risks in light of its historical returns. The bar chart shows the variability of the Fund’s A class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns for the Fund’s A class averaged over the stated periods, and includes comparative performance information. The Fund’s performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.Updated performance information for the Fund is available under the “Products” section at FederatedInvestors.com or by calling 1-800-341-7400.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns <span style="font-family:Times New Roman;font-size:10pt;margin-left:10pt;">The bar chart and performance table below reflect historical performance data for the Fund and are intended to help you </span><span style="font-family:Times New Roman;font-size:10pt;">analyze the Fund’s investment risks in light of its historical returns. The bar chart shows the variability of the Fund’s A class total returns on a calendar year-by-year basis.</span>
Performance Additional Market Index [Text] rr_PerformanceAdditionalMarketIndex <span style="font-family:Times New Roman;font-size:10pt;"> The Average Annual Total Return Table also shows the performance of the Fund compared to a broad-based securities market index as well as comparisons to a Blended Index and the Morningstar Multi-Sector Bond Funds Average which are additional performance benchmarks for the Fund.</span>
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone <span style="font-family:Times New Roman;font-size:10pt;">1-800-341-7400</span>
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress <span style="color:#0000FF;font-family:Times New Roman;font-size:10pt;">FederatedInvestors.com</span>
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture <span style="font-family:Times New Roman;font-size:10pt;font-style:italic;">The Fund’s performance will fluctuate, and past performance (before and after taxes) is not necessarily an indication of future results.</span>
Bar Chart [Heading] rr_BarChartHeading Federated Hermes Strategic Income Fund – A Class
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads <span style="color:#000000;font-family:Arial;font-size:6.6pt;font-style:italic;">The total returns shown in the bar chart do not reflect the payment of any sales charges or recurring shareholder account fees. If these charges or fees had been included, the returns shown would have been lower.</span>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock The total returns shown in the bar chart do not reflect the payment of any sales charges or recurring shareholder account fees. If these charges or fees had been included, the returns shown would have been lower.Within the periods shown in the bar chart, the Fund’s A class highest quarterly return was 9.01% (quarter ended June 30, 2020). Its lowest quarterly return was (10.87)% (quarter ended March 31, 2020).
Performance Table Heading rr_PerformanceTableHeading <span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">Average Annual Total Return Table</span>
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate <span style="font-family:Times New Roman;font-size:10pt;"> After-tax returns are calculated using a standard set of assumptions. The stated returns assume the highest historical </span><span style="font-family:Times New Roman;font-size:10pt;font-weight:bold;">federal</span><span style="font-family:Times New Roman;font-size:10pt;"> income and capital gains tax rates. These after-tax returns do </span><span style="font-family:Times New Roman;font-size:10pt;font-weight:bold;">not</span><span style="font-family:Times New Roman;font-size:10pt;"> reflect the effect of any applicable </span><span style="font-family:Times New Roman;font-size:10pt;font-weight:bold;">state</span><span style="font-family:Times New Roman;font-size:10pt;"> and </span><span style="font-family:Times New Roman;font-size:10pt;font-weight:bold;">local</span><span style="font-family:Times New Roman;font-size:10pt;"> taxes.</span>
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred <span style="font-family:Times New Roman;font-size:10pt;"> After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an Individual Retirement Account or other tax-advantaged investment plan.</span>
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock The Fund’s R6 class commenced operations on January 27, 2017. For the period prior to the commencement of operations of the R6 class, the performance information shown below is for the A class. The performance of the A class has not been adjusted to reflect the expenses applicable to the R6 class since it has a lower expense ratio than the expense ratio of the A class. The performance of the A class has been adjusted to reflect the absence of sales charges that aren’t applicable to the R6 class and adjusted to remove any voluntary waiver of Fund expenses related to the A class that may have occurred during the period prior to the commencement of operations of the R6 class. The Fund’s R6 class would have annual returns substantially similar to those of the A class because the shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that the classes do not have the same expenses. In addition to Return Before Taxes, Return After Taxes is shown for the Fund’s A class to illustrate the effect of federal taxes on Fund returns. Actual after-tax returns depend on each investor’s personal tax situation, and are likely to differ from those shown. After-tax returns are calculated using a standard set of assumptions. The stated returns assume the highest historical federal income and capital gains tax rates. These after-tax returns do not reflect the effect of any applicable state and local taxes. After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an Individual Retirement Account or other tax-advantaged investment plan. The Average Annual Total Return Table also shows the performance of the Fund compared to a broad-based securities market index as well as comparisons to a Blended Index and the Morningstar Multi-Sector Bond Funds Average which are additional performance benchmarks for the Fund.(For the Period Ended December 31, 2021)
Fee Waiver Or Reimbursement Over Assets, Later Of Termination Or Next Effective Prospectus fhfisi_FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus <span style="font-family:Arial;font-size:6.4pt;">up to but not including the later of (the “Termination Date”): </span><span style="font-family:Arial;font-size:6.4pt;">(a) </span><span style="font-family:Arial;font-size:6.4pt;"> February 1, </span><span style="font-family:Arial;font-size:6.4pt;">2023</span><span style="font-family:Arial;font-size:6.4pt;">; or (b) the date of the Fund’s next effective Prospectus.</span>
Federated Hermes Strategic Income Fund | A  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) rr_MaximumCumulativeSalesChargeOverOfferingPrice 4.50%
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 4.50%
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable) rr_MaximumDeferredSalesChargeOverOther none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption none
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fee rr_ManagementFeesOverAssets 0.55%
Distribution (12b-1) Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.49%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.07%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.11%) [1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 0.96%
1 Year rr_ExpenseExampleYear01 $ 554
3 Years rr_ExpenseExampleYear03 775
5 Years rr_ExpenseExampleYear05 1,014
10 Years rr_ExpenseExampleYear10 1,697
1 Year rr_ExpenseExampleNoRedemptionYear01 554
3 Years rr_ExpenseExampleNoRedemptionYear03 775
5 Years rr_ExpenseExampleNoRedemptionYear05 1,014
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,697
2012 rr_AnnualReturn2012 10.63%
2013 rr_AnnualReturn2013 (0.07%)
2014 rr_AnnualReturn2014 2.93%
2015 rr_AnnualReturn2015 (3.13%)
2016 rr_AnnualReturn2016 10.42%
2017 rr_AnnualReturn2017 6.06%
2018 rr_AnnualReturn2018 (3.28%)
2019 rr_AnnualReturn2019 12.72%
2020 rr_AnnualReturn2020 6.37%
2021 rr_AnnualReturn2021 3.61%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest quarterly return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2020
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 9.01%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest quarterly return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (10.87%)
1 Year rr_AverageAnnualReturnYear01 (1.02%)
5 Years rr_AverageAnnualReturnYear05 4.00%
10 Years rr_AverageAnnualReturnYear10 4.00%
Federated Hermes Strategic Income Fund | B  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) rr_MaximumCumulativeSalesChargeOverOfferingPrice 5.50%
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable) rr_MaximumDeferredSalesChargeOverOther 5.50%
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption none
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fee rr_ManagementFeesOverAssets 0.55%
Distribution (12b-1) Fee rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.52%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.85%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.09%) [1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 1.76%
1 Year rr_ExpenseExampleYear01 $ 738
3 Years rr_ExpenseExampleYear03 982
5 Years rr_ExpenseExampleYear05 1,201
10 Years rr_ExpenseExampleYear10 1,965
1 Year rr_ExpenseExampleNoRedemptionYear01 188
3 Years rr_ExpenseExampleNoRedemptionYear03 582
5 Years rr_ExpenseExampleNoRedemptionYear05 1,001
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,965
1 Year rr_AverageAnnualReturnYear01 (2.69%)
5 Years rr_AverageAnnualReturnYear05 3.83%
10 Years rr_AverageAnnualReturnYear10 3.85%
Federated Hermes Strategic Income Fund | C  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) rr_MaximumCumulativeSalesChargeOverOfferingPrice 1.00%
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable) rr_MaximumDeferredSalesChargeOverOther 1.00%
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption none
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fee rr_ManagementFeesOverAssets 0.55%
Distribution (12b-1) Fee rr_DistributionAndService12b1FeesOverAssets 0.75%
Other Expenses rr_OtherExpensesOverAssets 0.49%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.82%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.09%) [1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 1.73%
1 Year rr_ExpenseExampleYear01 $ 285
3 Years rr_ExpenseExampleYear03 572
5 Years rr_ExpenseExampleYear05 985
10 Years rr_ExpenseExampleYear10 1,940
1 Year rr_ExpenseExampleNoRedemptionYear01 185
3 Years rr_ExpenseExampleNoRedemptionYear03 572
5 Years rr_ExpenseExampleNoRedemptionYear05 985
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,940
1 Year rr_AverageAnnualReturnYear01 1.83%
5 Years rr_AverageAnnualReturnYear05 4.20%
10 Years rr_AverageAnnualReturnYear10 3.86%
Federated Hermes Strategic Income Fund | F  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) rr_MaximumCumulativeSalesChargeOverOfferingPrice 2.00%
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 1.00%
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable) rr_MaximumDeferredSalesChargeOverOther 1.00%
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption none
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fee rr_ManagementFeesOverAssets 0.55%
Distribution (12b-1) Fee rr_DistributionAndService12b1FeesOverAssets none [2]
Other Expenses rr_OtherExpensesOverAssets 0.48%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 1.06%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.10%) [1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 0.96%
1 Year rr_ExpenseExampleYear01 $ 307
3 Years rr_ExpenseExampleYear03 434
5 Years rr_ExpenseExampleYear05 679
10 Years rr_ExpenseExampleYear10 1,381
1 Year rr_ExpenseExampleNoRedemptionYear01 207
3 Years rr_ExpenseExampleNoRedemptionYear03 434
5 Years rr_ExpenseExampleNoRedemptionYear05 679
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 1,381
1 Year rr_AverageAnnualReturnYear01 1.66%
5 Years rr_AverageAnnualReturnYear05 4.77%
10 Years rr_AverageAnnualReturnYear10 4.38%
Federated Hermes Strategic Income Fund | IS  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable) rr_MaximumDeferredSalesChargeOverOther none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption none
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fee rr_ManagementFeesOverAssets 0.55%
Distribution (12b-1) Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.22%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.80%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.16%) [1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 0.64%
1 Year rr_ExpenseExampleYear01 $ 82
3 Years rr_ExpenseExampleYear03 255
5 Years rr_ExpenseExampleYear05 444
10 Years rr_ExpenseExampleYear10 990
1 Year rr_ExpenseExampleNoRedemptionYear01 82
3 Years rr_ExpenseExampleNoRedemptionYear03 255
5 Years rr_ExpenseExampleNoRedemptionYear05 444
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 990
1 Year rr_AverageAnnualReturnYear01 3.96%
5 Years rr_AverageAnnualReturnYear05 5.31%
10 Years rr_AverageAnnualReturnYear10 4.78%
Federated Hermes Strategic Income Fund | R6  
Risk Return Abstract rr_RiskReturnAbstract  
Maximum Sales Charge (Load) rr_MaximumCumulativeSalesChargeOverOfferingPrice none
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, as applicable) rr_MaximumDeferredSalesChargeOverOther none
Maximum Sales Charge (Load) Imposed on Reinvested Dividends (and other Distributions) (as a percentage of offering price) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee (as a percentage of amount redeemed, if applicable) rr_RedemptionFeeOverRedemption none
Exchange Fee rr_ExchangeFeeOverRedemption none
Management Fee rr_ManagementFeesOverAssets 0.55%
Distribution (12b-1) Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.15%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.73%
Fee Waivers and/or Expense Reimbursements rr_FeeWaiverOrReimbursementOverAssets (0.10%) [1]
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements rr_NetExpensesOverAssets 0.63%
1 Year rr_ExpenseExampleYear01 $ 75
3 Years rr_ExpenseExampleYear03 233
5 Years rr_ExpenseExampleYear05 406
10 Years rr_ExpenseExampleYear10 906
1 Year rr_ExpenseExampleNoRedemptionYear01 75
3 Years rr_ExpenseExampleNoRedemptionYear03 233
5 Years rr_ExpenseExampleNoRedemptionYear05 406
10 Years rr_ExpenseExampleNoRedemptionYear10 $ 906
1 Year rr_AverageAnnualReturnYear01 3.94%
5 Years rr_AverageAnnualReturnYear05 5.32%
10 Years rr_AverageAnnualReturnYear10 4.66%
Federated Hermes Strategic Income Fund | Return After Taxes on Distributions | A  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.36%)
5 Years rr_AverageAnnualReturnYear05 2.44%
10 Years rr_AverageAnnualReturnYear10 2.33%
Federated Hermes Strategic Income Fund | Return After Taxes on Distributions and Sale of Fund Shares | A  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (0.61%)
5 Years rr_AverageAnnualReturnYear05 2.37%
10 Years rr_AverageAnnualReturnYear10 2.31%
Federated Hermes Strategic Income Fund | Bloomberg US Aggregate Bond Index(reflects no deduction for fees, expenses or taxes)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (1.54%) [3]
5 Years rr_AverageAnnualReturnYear05 3.57% [3]
10 Years rr_AverageAnnualReturnYear10 2.90% [3]
Federated Hermes Strategic Income Fund | Blended Index(reflects no deduction for fees, expenses or taxes)  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 1.29% [4]
5 Years rr_AverageAnnualReturnYear05 4.59% [4]
10 Years rr_AverageAnnualReturnYear10 4.85% [4]
Federated Hermes Strategic Income Fund | Morningstar Multisector Bond Funds Average  
Risk Return Abstract rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 2.49% [5]
5 Years rr_AverageAnnualReturnYear05 4.28% [5]
10 Years rr_AverageAnnualReturnYear10 4.50% [5]
[1] The Adviser and certain of its affiliates on their own initiative have agreed to waive certain amounts of their respective fees and/or reimburse expenses. Totalannual fund operating expenses (excluding Acquired Fund Fees and Expenses, interest expense, extraordinary expenses, tax reclaim recovery expenses and proxy-related expenses paid by the Fund, if any) paid by the Fund’s A, B, C, F, IS and R6 classes (after the voluntary waivers and/or reimbursements) will not exceed 0.93%, 1.73%, 1.70%, 0.93%, 0.61% and 0.60%, (the “Fee Limit”), respectively, up to but not including the later of (the “Termination Date”): (a) February 1, 2023; or (b) the date of the Fund’s next effective Prospectus. While the Adviser and its affiliates currently do not anticipate terminating or increasing these arrangements prior to the Termination Date, these arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Directors.
[2] The Fund has adopted a Distribution (12b-1) Plan for its F class shares pursuant to which the F class of the Fund may incur and pay a Distribution (12b-1) fee of up to a maximum of 0.05%. No such fee is currently incurred and paid by the F class of the Fund. The F class of the Fund will not incur and pay such a Distribution (12b-1) fee until such time as approved by the Fund’s Board of Directors (the “Directors”).
[3] The Bloomberg US Aggregate Bond Index is a broad-based benchmark that measures the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market. Effective August 24, 2021, the name of the index changed from “Bloomberg Barclays US Aggregate Bond Index” to “Bloomberg US Aggregate Bond Index.
[4] The Blended Index is comprised of 25% Bloomberg EM Seasoned ex Aggregate/Eurodollar Index/40% Bloomberg US Corporate High Yield 2% Issuer Capped Index/35% Bloomberg US Mortgage Backed Securities Index. Effective August 24, 2021, the name of the index changed from “Bloomberg”indexes changed from “Bloomberg Barclays” to “Bloomberg.” The Bloomberg EM Seasoned ex Aggregate/Eurodollar Index is the emerging marketsdebt component of the Bloomberg US Universal Bond Index and is generally at least 80% non-investment grade.The Bloomberg US Corporate High Yield 2% Issuer Capped Index is an issuer-constrained version of the Bloomberg US Corporate High-Yield Index that measures the market of USD-denominated, noninvestment-grade, fixed-rate, taxable corporate bonds. The index follows the same rules as the uncapped index but limits the exposure of each issuer to 2% of the total market value and redistributes any excess market value index-wide on a pro-rata basis. The Bloomberg USMortgage Backed Securities Index tracks agency mortgage backed pass-through securities (both fixed-rate and hybrid ARM) guaranteed by Ginnie Mae (GNMA), Fannie Mae (FNMA), and Freddie Mac (FHLMC).
[5] Morningstar figures represent the average of the total returns reported by all the mutual funds designated by Morningstar as falling into the respective category indicated. They do not reflect sales charges.