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Label

Element

Value

Risk Return Abstract

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Prospectus Date

rr_ProspectusDate

Dec. 31, 2021

Federated Hermes Max-Cap Index Fund

Risk Return Abstract

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

<span style="color:#000000;font-family:Times New Roman;font-size:14pt;margin-left:0%;">Fund Summary Information </span><span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;margin-left:0%;">Federated Hermes Max-Cap Index Fund (the “Fund”)</span>

Objective [Heading]

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<span style="color:#000000;font-family:Arial;font-size:8pt;font-weight:bold;margin-left:0%;text-transform:uppercase;">RISK/RETURN SUMMARY: INVESTMENT OBJECTIVE</span>

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund’s investment objective is to provide investment results that generally correspond to the aggregate price and performance of publicly traded common stocks comprising the Standard & Poor’s 500.

Expense [Heading]

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<span style="color:#000000;font-family:Arial;font-size:8pt;font-weight:bold;margin-left:0%;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 C Shares (C), Class R Shares (R), Institutional Shares (IS) and Service Shares (SS) 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. Information about certain sales charge discounts is available from your financial professional, in the “What Do Shares Cost?” section of the Prospectus on page 10 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;margin-left:0%;">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;margin-left:0%;">Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of </span><span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;">your investment)</span>

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

<span style="font-family:Arial;font-size:6.4pt;">January 1, 2023</span>

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

<span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;margin-left:0%;">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 33% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

33.00%

Expense Example [Heading]

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<span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;margin-left:0%;">Example</span>

Expense Example Narrative [Text Block]

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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;margin-left:0%;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;margin-left:0%;">What are the Fund’s Main Investment Strategies?</span>

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund normally invests its assets primarily in common stocks included in the Standard & Poor’s 500 Index (“Index”). The Index is a broad-based market index that measures the performance of the broad domestic economy through changes in the aggregate market value of 500 stocks representing all major industries. Under normal circumstances, the Manager will also use enhanced management techniques as further described in the Prospectus in an attempt to improve the performance of its portfolio relative to the Index to compensate for Fund expenses and tracking error. The Manager’s principal enhanced technique will be to over or underweight positions in securities within the Index based upon the Manager’s quantitative analysis of the securities. The Fund may invest in derivative contracts (such as, for example, futures contracts), to implement its investment strategies. The Fund may use derivative contracts to increase or decrease the portfolio’s exposure to the investment(s) underlying the derivative in an attempt to benefit from changes in the value of the underlying investment(s), to realize gains from trading a derivative contract or to hedge against potential losses. There can be no assurances that the Fund’s use of derivative contracts 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 Fund will invest its net assets so that at least 80% of its net assets (plus any borrowings for investment purposes) are invested in Index investments. The Fund will notify shareholders of any changes in its investment policies that would enable the Fund to normally invest less than 80% of its net assets (plus any borrowings for investment purposes) in Index investments.The Fund’s Manager has received an exemptive order from the SEC to permit the Trust and the Board of Trustees (the “Board”) to appoint and replace subadvisers for the Fund and to enter into and amend the Fund’s subadvisory agreements without further shareholder approval.

rr_RiskHeading

<span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;margin-left:0%;">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:■ 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.■ Sector Risk. Because the Fund may allocate relatively more assets to certain industry sectors than others, the Fund’s performance may be more susceptible to any developments which affect those sectors emphasized by the Fund.■ Leverage Risk. Leverage risk is created when an investment 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.■ Liquidity Risk. Liquidity risk 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. If this happens, the Fund will be required to continue to hold the security or keep the position open, and the Fund could incur losses. Over-the-counter (OTC) derivative contracts generally carry greater liquidity risk than exchange-traded contracts.■ Risk of Investing in Derivative Contracts. Derivative contracts 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 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 may also involve other risks described in this Prospectus, such as stock market, credit, liquidity and leverage risks.■ Counterparty Credit Risk. Credit risk includes the possibility that a party to a transaction involving the Fund will fail to meet its obligations.■ 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.■ Quantitative Modeling Risk. The Fund employs quantitative models as a management technique. These models examine multiple economic factors using various proprietary and third-party data. The results generated by quantitative analysis may perform differently than expected and may negatively affect Fund performance for various reasons (for example, human judgment, data imprecision, software or other technology malfunctions, or programming inaccuracies).■ Technology Risk. The Manager 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]

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<span style="color:#000000;font-family:Times New Roman;font-size:10pt;margin-left:2.03%;">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:2.03%;">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;margin-left:0%;text-transform:uppercase;">Performance: Bar Chart and Table </span><span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;margin-left:0%;">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 IS class total returns on a calendar year-by-year basis. The Average Annual Total Return Table shows returns 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="color:#000000;font-family:Times New Roman;font-size:10pt;margin-left:2.03%;">The bar chart and performance table below reflect historical performance data for the Fund and are intended to help </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;">you analyze the Fund’s investment risks in light of its historical returns. The bar chart shows the variability of the Fund’s IS class total returns on a calendar year-by-year basis.</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="color:#000000;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]

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Federated Max-Cap Index Fund – IS Class

Bar Chart Closing [Text Block]

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The Fund’s IS class total return for the nine-month period from January 1, 2021 to September 30, 2021, was 15.59%.Within the periods shown in the bar chart, the Fund’s IS class highest quarterly return was 20.49% (quarter ended June 30, 2020). Its lowest quarterly return was (19.65)% (quarter ended March 31, 2020).

Performance Table Heading

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<span style="color:#000000;font-family:Arial;font-size:8.5pt;font-weight:bold;margin-left:0%;">Average Annual Total Return Table</span>

Performance Table Uses Highest Federal Rate

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<span style="color:#000000;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="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">federal </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;">income and capital gains tax rates. These after-tax returns do </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">not</span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;"> reflect the effect of any applicable </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">state</span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;"> and </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:bold;">local</span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;"> taxes.</span>

Performance Table Not Relevant to Tax Deferred

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<span style="color:#000000;font-family:Times New Roman;font-size:10pt;">After-tax returns are not relevant to investors holding Shares through a 401(k) plan, an </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;">Individual Retirement Account and other tax-advantage investment plans.</span>

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

<span style="color:#000000;font-family:Times New Roman;font-size:10pt;">After-tax returns are shown only for IS class and after-tax returns for C, R and SS classes will differ </span><span style="color:#000000;font-family:Times New Roman;font-size:10pt;">from those shown for the IS class.</span>

Performance Table Narrative

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In addition to Return Before Taxes, Return After Taxes is shown for the Fund’s IS class to illustrate the effect of federal taxes on Fund returns. After-tax returns are shown only for IS class and after-tax returns for C, R and SS classes will differ from those shown for the IS class.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 and other tax-advantage investment plans.(For the Periods Ended December 31, 2020)

Fee Waiver Or Reimbursement Over Assets, Later Of Termination Or Next Effective Prospectus

fhit_FeeWaiverOrReimbursementOverAssetsLaterOfTerminationOrNextEffectiveProspectus

<span style="font-family:Arial;font-size:6.4pt;">up to but not including the later of (the “Termination Date”): (a) </span><span style="font-family:Arial;font-size:6.4pt;">January 1, 2023</span><span style="font-family:Arial;font-size:6.4pt;">; or (b) the date of the Fund’s next </span><span style="font-family:Arial;font-size:6.4pt;">effective Prospectus.</span>

Federated Hermes Max-Cap Index Fund | C

Risk Return Abstract

rr_RiskReturnAbstract

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

rr_ExchangeFeeOverRedemption

none

rr_ManagementFeesOverAssets

0.30%

Distribution (12b-1) Fee

rr_DistributionAndService12b1FeesOverAssets

0.75%

rr_OtherExpensesOverAssets

0.46%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.51%

Fee Waivers and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.06%)

^[1]

Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements

rr_NetExpensesOverAssets

1.45%

rr_ExpenseExampleYear01

$ 254

rr_ExpenseExampleYear03

477

rr_ExpenseExampleYear05

824

rr_ExpenseExampleYear10

1,802

rr_ExpenseExampleNoRedemptionYear01

154

rr_ExpenseExampleNoRedemptionYear03

477

rr_ExpenseExampleNoRedemptionYear05

824

rr_ExpenseExampleNoRedemptionYear10

$ 1,802

rr_AverageAnnualReturnYear01

15.92%

rr_AverageAnnualReturnYear05

13.69%

rr_AverageAnnualReturnYear10

12.42%

Federated Hermes Max-Cap Index Fund | R

Risk Return Abstract

rr_RiskReturnAbstract

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

rr_ExchangeFeeOverRedemption

none

rr_ManagementFeesOverAssets

0.30%

Distribution (12b-1) Fee

rr_DistributionAndService12b1FeesOverAssets

0.50%

rr_OtherExpensesOverAssets

0.40%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.20%

Fee Waivers and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.08%)

^[1]

Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements

rr_NetExpensesOverAssets

1.12%

rr_ExpenseExampleYear01

$ 122

rr_ExpenseExampleYear03

381

rr_ExpenseExampleYear05

660

rr_ExpenseExampleYear10

1,455

rr_ExpenseExampleNoRedemptionYear01

122

rr_ExpenseExampleNoRedemptionYear03

381

rr_ExpenseExampleNoRedemptionYear05

660

rr_ExpenseExampleNoRedemptionYear10

$ 1,455

rr_AverageAnnualReturnYear01

17.12%

rr_AverageAnnualReturnYear05

14.04%

rr_AverageAnnualReturnYear10

12.78%

Federated Hermes Max-Cap Index Fund | IS

Risk Return Abstract

rr_RiskReturnAbstract

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

rr_ExchangeFeeOverRedemption

none

rr_ManagementFeesOverAssets

0.30%

Distribution (12b-1) Fee

rr_DistributionAndService12b1FeesOverAssets

none

rr_OtherExpensesOverAssets

0.21%

^[2]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.51%

Fee Waivers and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.14%)

^[1]

Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements

rr_NetExpensesOverAssets

0.37%

rr_ExpenseExampleYear01

$ 52

rr_ExpenseExampleYear03

164

rr_ExpenseExampleYear05

285

rr_ExpenseExampleYear10

640

rr_ExpenseExampleNoRedemptionYear01

52

rr_ExpenseExampleNoRedemptionYear03

164

rr_ExpenseExampleNoRedemptionYear05

285

rr_ExpenseExampleNoRedemptionYear10

$ 640

rr_AnnualReturn2011

1.98%

rr_AnnualReturn2012

15.58%

rr_AnnualReturn2013

32.68%

rr_AnnualReturn2014

13.30%

rr_AnnualReturn2015

1.08%

rr_AnnualReturn2016

11.79%

rr_AnnualReturn2017

21.73%

rr_AnnualReturn2018

(4.62%)

rr_AnnualReturn2019

30.70%

rr_AnnualReturn2020

17.98%

Year to Date Return, Label

rr_YearToDateReturnLabel

The Fund's IS class total return for the nine-month period

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2021

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

15.59%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest quarterly return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2020

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

20.49%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest quarterly return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(19.65%)

rr_AverageAnnualReturnYear01

17.98%

rr_AverageAnnualReturnYear05

14.89%

rr_AverageAnnualReturnYear10

13.62%

Federated Hermes Max-Cap Index Fund | SS

Risk Return Abstract

rr_RiskReturnAbstract

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

rr_ExchangeFeeOverRedemption

none

rr_ManagementFeesOverAssets

0.30%

Distribution (12b-1) Fee

rr_DistributionAndService12b1FeesOverAssets

0.30%

rr_OtherExpensesOverAssets

0.46%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.06%

Fee Waivers and/or Expense Reimbursements

rr_FeeWaiverOrReimbursementOverAssets

(0.39%)

^[1]

Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements

rr_NetExpensesOverAssets

0.67%

rr_ExpenseExampleYear01

$ 108

rr_ExpenseExampleYear03

337

rr_ExpenseExampleYear05

585

rr_ExpenseExampleYear10

1,294

rr_ExpenseExampleNoRedemptionYear01

108

rr_ExpenseExampleNoRedemptionYear03

337

rr_ExpenseExampleNoRedemptionYear05

585

rr_ExpenseExampleNoRedemptionYear10

$ 1,294

rr_AverageAnnualReturnYear01

17.62%

rr_AverageAnnualReturnYear05

14.53%

rr_AverageAnnualReturnYear10

13.27%

Federated Hermes Max-Cap Index Fund | Return After Taxes on Distributions | IS

Risk Return Abstract

rr_RiskReturnAbstract

rr_AverageAnnualReturnYear01

12.43%

rr_AverageAnnualReturnYear05

9.13%

rr_AverageAnnualReturnYear10

9.56%

Federated Hermes Max-Cap Index Fund | Return After Taxes on Distributions and Sale of Fund Shares | IS

Risk Return Abstract

rr_RiskReturnAbstract

rr_AverageAnnualReturnYear01

14.39%

rr_AverageAnnualReturnYear05

10.67%

rr_AverageAnnualReturnYear10

10.26%

Federated Hermes Max-Cap Index Fund | Standard and Poor's 500 Index(reflects no deduction for fees, expenses or taxes)

Risk Return Abstract

rr_RiskReturnAbstract

rr_AverageAnnualReturnYear01

18.40%

^[3]

rr_AverageAnnualReturnYear05

15.22%

^[3]

rr_AverageAnnualReturnYear10

13.88%

^[3]

[1]	The Manager and certain of its affiliates on their own initiative have agreed to waive certain amounts of their respective fees and/or reimburse expenses. Total annual fund operating expenses (excluding acquired fund fees and expenses, interest expense, extraordinary expenses and proxy-related expenses paid by the Fund, if any) paid by the Fund’s C, R, IS and SS classes (after the voluntary waivers and/or reimbursements) will not exceed 1.44%, 1.11%, 0.36% and 0.66% (the “Fee Limit”), respectively, up to but not including the later of (the “Termination Date”): (a) January 1, 2023; or (b) the date of the Fund’s next effective Prospectus. While the Manager 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 Trustees.
[2]	The Fund may incur and pay certain service fees (shareholder services/account administration fees) on its IS class of up to a maximum amount of 0.25%. No such fees are currently incurred and paid by the IS class of the Fund. The IS class of the Fund will not incur and pay such fees until such time as approved by the Fund’s Board of Trustees (the “Trustees”).
[3]	The Standard and Poor’s 500® Index is an unmanaged capitalization weighted index of 500 stocks designated to measure performance of the broad domestic economy through changes in the aggregate market value of 500 stocks representing all major industries.