Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Denominator Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Total Net Income Attributable to Federated Hermes Common Stock - Diluted Net Income (Loss) Available to Common Stockholders, Diluted Document Fiscal Year Focus Document Fiscal Year Focus Expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Acquisition related transaction costs Business Combination, Acquisition-Related Cost, Expense Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Other Other Assets, Fair Value Disclosure Stocks of Small and Mid Sized Companies Stocks Of Small And Mid Sized Companies [Member] Stocks Of Small And Mid Sized Companies Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Common Stock Common Stock, Value, Issued Intangible Asset Related Impairment And Amortization Of Intangible Assets Impairment And Amortization Of Intangible Assets Accrued Compensation and Benefits Employee-related Liabilities, Current Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Restatement Determination Date Restatement Determination Date Derivative Instrument [Axis] Derivative Instrument [Axis] Contract terms Revenue, Performance Obligation, Description of Timing Less: Total Net Income Available to Participating Unvested Restricted Shareholders Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Measurement Frequency [Axis] Measurement Frequency [Axis] Net Income (Loss) Equity Profit Loss Profit or loss for the period, net of income taxes. Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Current Liabilities Liabilities, Current [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Depreciation and Amortization Other Depreciation and Amortization Loss Contingencies [Table] Loss Contingencies [Table] Other Comprehensive Income (Loss), net of tax Other Comprehensive Income (Loss), Net of Tax [Abstract] Total Long-Term Liabilities Liabilities, Noncurrent Consolidated Entities [Domain] Consolidated Entities [Domain] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Optional increase (or an accordion feature) Line Of Credit Facility, Accordion Feature Line Of Credit Facility, Accordion Feature PEO Total Compensation Amount PEO Total Compensation Amount Insurance reimbursement receivable Loss Contingency, Receivable Long-Term Liabilities Liabilities, Noncurrent [Abstract] Intangible Assets, net of accumulated amortization of $103,643 and $95,365, respectively Intangible Asset, Excluding Goodwill, after Accumulated Amortization Basic Weighted-Average Federated Hermes Common Stock (in shares) Weighted Average Number of Shares Outstanding, Basic Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Termination period (in months) Revenue, Performance Obligation, Notice Of Termination, Period Revenue, Performance Obligation, Notice Of Termination, Period Business Acquisition Increase (Decrease) to Stockholders Equity, Business Acquisition Increase (Decrease) to Stockholders Equity, Business Acquisition Total Current Liabilities Liabilities, Current Federated Hermes Prime Cash Obligations Fund Federated Hermes Prime Cash Obligations Fund [Member] Federated Hermes Prime Cash Obligations Fund Other Service Fees, net Financial Service, Other [Member] Customer Relationships Customer Relationships [Member] Money Market Assets Money market assets [Member] Money market funds and separate accounts that invest in short-term money market instruments, for example, but not limited to, commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and other highly liquid securities. Concentration Risk [Table] Concentration Risk [Table] Entity Address, City or Town Entity Address, City or Town Restricted stock awarded in period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Distribution Distribution Service [Member] Document Information [Line Items] Document Information [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Treasury Stock [Axis] Class of Stock [Axis] Stocks of Large Companies Stocks Of Large Companies [Member] Stocks Of Large Companies Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Total Net Income Attributable to Federated Hermes Common Stock - Basic Net Income (Loss) Available to Common Stockholders, Basic Level 2 Fair Value, Inputs, Level 2 [Member] Nonoperating Income (Expenses) Nonoperating Income (Expense) [Abstract] Intangible assets, accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Other Comprehensive Income (Loss), net of tax Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] U.S. UNITED STATES Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Recently Issued Accounting Guidance Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Ventus Portfolio Ventus Portfolio [Member] Ventus Portfolio Use of Estimates Use of Estimates, Policy [Policy Text Block] Other Comprehensive Income (Loss), net of tax Other Comprehensive Income (Loss), Net Of Tax, Statement Of Shareholders' Equity Amount after tax and reclassification adjustments of other comprehensive income (loss). Related Party, Type [Axis] Related and Nonrelated Parties [Axis] Other Comprehensive Income (Loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Long-Term Debt Long-term debt, net of issuance costs Long-Term Debt Document Period End Date Document Period End Date Other Changes in Assets and Liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net Cash Provided (Used) by Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Other Entities Subsidiaries [Member] Aggregate amount Debt Instrument, Face Amount Equity Redeemable Noncontrolling Interests in Subsidiaries Equity [Text Block] Purchase of Treasury Stock (in shares) Stock Issued During Period, Shares, Period Increase (Decrease) Federated Hermes’ Net Interest in VIEs Net Assets Operating Expenses Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Treasury Stock, at Cost, 24,596,462 and 23,118,490 Shares Class B Common Stock, respectively Treasury Stock, Common, Value Contributions from Noncontrolling Interests in Subsidiaries Proceeds from Noncontrolling Interests Accumulated Other Comprehensive Income (Loss), net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Class B Class B Shares Common Class B [Member] Changes in Fair Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Fixed-Income Assets Fixed income assets [Member] Funds and separate accounts that invest primarily in fixed income investments. Lease Liabilities Operating Lease, Liability, Current Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Earnings Per Share Attributable to Federated Hermes, Inc. Shareholders Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Amounts Attributable to Federated Hermes, Inc. Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total Liabilities Less: Liabilities Liabilities Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Cash Paid for Property and Equipment Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Schedule of Purchase Price Allocation Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Company Selected Measure Name Company Selected Measure Name Schedule of Investments [Table] Schedule of Investments [Table] Income Tax Disclosure [Abstract] Concentration Risk [Line Items] Concentration Risk [Line Items] Business Acquisition Temporary Equity, Business Acquisition Temporary Equity, Business Acquisition Credit Facility [Domain] Credit Facility [Domain] Asset Class [Domain] Asset Class [Domain] Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Investment Income, net Investment Income, Interest and Dividend Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted Weighted-Average Federated Hermes Common Stock (in shares) Weighted Average Number of Shares Outstanding, Diluted Business acquisition, percentage Business Combination, Voting Equity Interest Acquired, Percentage Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Money market funds which meet the scope exception of the consolidation guidance Nonconsolidated Legal Entity, Financial Support Amount Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Federated Hermes' maximum risk of loss Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Travel and Related Travel and Entertainment Expense Business Acquisition (in shares) Treasury Stock, Shares, Business Acquisitions Treasury Stock, Shares, Business Acquisitions Financial Support to Nonconsolidated Legal Entity [Axis] Financial Support to Nonconsolidated Legal Entity [Axis] Distributions to Noncontrolling Interests in Subsidiaries Distributions to Noncontrolling Interests in Subsidiaries Temporary Equity, Decrease from Distributions to Noncontrolling Interest Holders Temporary Equity, Decrease from Distributions to Noncontrolling Interest Holders Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock Treasury Stock, Common [Member] Intangible Asset, Goodwill and Other [Abstract] Intangible Asset, Goodwill and Other [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Net Sales (Purchases) of Investments—Consolidated Investment Companies Proceeds from (Payments for) Investments-Consolidated investment companies Proceeds from (Payments for) Investments-Consolidated investment companies Level 1 Fair Value, Inputs, Level 1 [Member] Schedule of Revenue Concentration Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Effective income tax rate (in percent) Effective Income Tax Rate Reconciliation, Percent Goodwill increase Goodwill, Period Increase (Decrease) Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Dilutive Impact from Non-forfeitable Restricted Stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Increase in intangible assets Increase (Decrease) in Intangible Assets, Current Debt Expense Interest and Debt Expense Right-of-Use Assets, net Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Accumulated Other Comprehensive Income (Loss), net of tax [Rollforward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Stock Award Activity (in shares) Stock Issued During Period, Shares, Treasury Stock Reissued Schedule of Changes in Redeemable Noncontrolling Interest in Subsidiaries Temporary Equity [Table Text Block] Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Schedule of Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Segment and Geographic Information Segment Reporting [Text Block] Investments Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Amounts outstanding under the revolving credit facility Long-Term Line of Credit Minimum Minimum [Member] Expiration Date Trading Arrangement Expiration Date Investments Investments, Fair Value Disclosure Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] LIABILITIES Liabilities [Abstract] Effect of Exchange Rates on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Location, Statement of Income, Balance [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash and Cash Equivalents Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Total Financial Liabilities Financial Liabilities Fair Value Disclosure Receivables, net of reserve of $21 and $21, respectively Other Nonrelated Party [Member] Affiliates Receivables—Affiliates Investments—Affiliates and Other Affiliated Entity [Member] Business Combination [Line Items] Business Combination [Line Items] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Numerator Earnings Per Share Reconciliation [Abstract] Estimated useful life (in years) Intangible Asset, Finite-Lived, Useful Life Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Concentration Risk Concentration Risk Disclosure [Text Block] Common stock, no par value (usd per share) Common Stock, No Par Value Measurement Input, Revenue Volatility Measurement Input, Revenue Volatility [Member] Measurement Input, Revenue Volatility AUM for non-consolidated Federated Hermes Funds Assets under Management, Carrying Amount Exercise Price Award Exercise Price Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Proceeds from Redemptions of Investments—Affiliates and Other Proceeds from redemptions of investments - affiliates & other Proceeds from redemptions of investments - affiliates & other Investment Advisory Fees, net Investment Advisory Investment Advisory, Management and Administrative Service [Member] Total Purchase Price Consideration Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill, Less Noncontrolling Interest Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Debt Debt Disclosure [Text Block] Consolidation (Deconsolidation) Temporary Equity, Consolidation (Deconsolidation) Temporary Equity, Consolidation (Deconsolidation) Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Business Combination [Table] Business Combination [Table] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Measurement Input Type [Domain] Measurement Input Type [Domain] Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Adoption Date Trading Arrangement Adoption Date Fixed rate Debt Instrument, Interest Rate, Stated Percentage Federated Hermes Funds Federated Hermes Funds [Member] Federated Hermes Funds [Member] Dividends Declared Dividends, Common Stock, Cash Total Permanent Equity Balance, beginning of period Balance, end of period Equity, Attributable to Parent Total Nonoperating Income (Expenses), net Nonoperating Income (Expense) Other Assets Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Professional Service Fees Professional Fees Insider Trading Policies and Procedures [Line Items] Other Financing Activities Proceeds from (Payment for) Other Financing Activity Receivables, reserve Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Number of shares authorized under share repurchase program (in shares) Share Repurchase Program, Authorized, Number of Shares Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Provision (Benefit) for Deferred Income Taxes Deferred Income Tax Expense (Benefit) Business Combination [Domain] Business Combination [Domain] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segments Number of Operating Segments Entity Central Index Key Entity Central Index Key Property and equipment, accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Business Combination [Axis] Business Combination [Axis] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net Cash Provided (Used) by Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Income Statement [Abstract] Federated Hermes, Inc. Shareholders’ Equity Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Measurement Input, Revenue Risk Premium Measurement Input, Revenue Risk Premium [Member] Measurement Input, Revenue Risk Premium Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Gain (Loss) on Securities, net Gain (Loss) on Securities, net Gain (Loss) on Investments Investment, Name [Axis] Investment, Name [Axis] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] City Area Code City Area Code Accumulated Other Comprehensive Income (Loss), net of tax AOCI Attributable to Parent [Member] Document Information [Table] Document Information [Table] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Less: Redeemable Noncontrolling Interests in Subsidiaries Redeemable Noncontrolling Interest, Equity, Other, Fair Value Schedule of Revenue from U.S. and Non-U.S. Operations Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue [Table Text Block] Dividends Paid Payments of Dividends Name Forgone Recovery, Individual Name Performance fees including carried interest Performance Fees Including Carried Interest Performance Fees Including Carried Interest Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Fair value of shares issued Business Combination, Consideration Transferred, Equity Interest Total Long-Term Assets Assets, Noncurrent Statement [Line Items] Statement [Line Items] Total Assets Assets Entity [Domain] Entity [Domain] Variable Interest Entity Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Less: Liabilities Assumed Business Combination, Recognized Liability Assumed, Liability Share-Based Compensation Share-Based Payment Arrangement [Text Block] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Office and Occupancy Occupancy, Net Accounts Payable and Accrued Expenses Accounts Payable and Other Accrued Liabilities, Current PEO PEO [Member] Separate Accounts Separate accounts [Member] Separate accounts [Member] Investments Investments—Consolidated Investment Companies Marketable Securities, Current Other Long-Term Liabilities Other Liabilities, Noncurrent Goodwill Goodwill Fixed-income Fixed Income Securities [Member] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Goodwill Goodwill, Acquired During Period Rivington Energy Management Limited Rivington Energy Management Limited [Member] Rivington Energy Management Limited Subsequent Event Type [Domain] Subsequent Event Type [Domain] Retained Earnings Retained Earnings [Member] Long-Term Lease Liabilities Operating Lease, Liability, Noncurrent Total Operating Expenses Operating Expenses Money market Money Market Funds [Member] Cash and Cash Equivalents Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Federated Hermes Government Obligations Fund Federated Hermes Government Obligations Fund [Member] Federated Hermes Government Obligations Fund Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Beginning Balance (in shares) Ending Balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Foreign Currency Translation Gain (Loss) Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Debt Securities Corporate Debt Securities [Member] Earnings Per Common Share—Diluted (usd per share) Net Income Attributable to Federated Hermes Common Stock - Diluted (usd per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net Cash Provided (Used) by Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount (Increase) Decrease in Prepaid Expenses and Other Assets Increase (Decrease) in Prepaid Expense and Other Assets Net Unrealized (Gain) Loss on Investments Net Unrealized Gains (Losses) Unrealized Gain (Loss) on Investments Loss contingency settlement paid Loss Contingency, Damages Paid, Value Amortization expense for finite-lived intangible assets Intangible Asset, Finite-Lived, Amortization Expense Consolidated Investment Companies Consolidated Investment Companies [Member] Consolidated Investment Companies [Member] Ownership [Domain] Ownership [Domain] Adjustments to Reconcile Net Income to Net Cash Provided (Used) by Operating Activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Class B Common Stock Key Employees Class B Common Stock Key Employees [Member] Class B Common Stock Key Employees [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Total Revenue Total Revenue Revenue from Contract with Customer, Excluding Assessed Tax Property and Equipment, net of accumulated depreciation of $89,199 and $86,955, respectively Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Available for borrowings Line of Credit Facility, Remaining Borrowing Capacity Schedule of Activity for Class B Common Stock and Treasury Stock Schedule of Stockholders Equity [Table Text Block] Commitment fee Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Financial Instruments [Domain] Financial Instruments [Domain] Financial Assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Derivative asset Derivative Asset Less: Fair Value of Redeemable Noncontrolling Interest in Subsidiary Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Intangible Assets, including Goodwill Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Prepaid Expenses Prepaid Expense, Current Business Acquisition (in shares) Stock Issued During Period, Shares, Acquisitions Other Investing Activities Payment for (Proceeds from) Other Investing Activity Administrative Service Fees, net—Affiliates Administrative Services Administrative Service [Member] Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] Schedule of Right-of-Use Assets, Net and Property and Equipment, Net by Geographic Area Schedule Of Right Of Use Assets And Property, Plant And Equipment By Geographic Area [Table Text Block] Schedule Of Right Of Use Assets And Property, Plant And Equipment By Geographic Area [Table Text Block] Net Income (Loss) Net Income (Loss) Temporary Equity, Net Income Other Current Assets Other Assets, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Balance at beginning Balance at end Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Contingent consideration term Business Combination, Contingent Consideration, Term Business Combination, Contingent Consideration, Term Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating Income Operating Income (Loss) Total Remaining Unsatisfied Performance Obligations Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Business Combination Business Combination [Text Block] Systems and Communications Communications and Information Technology Subscriptions—Redeemable Noncontrolling Interest Holders Subscriptions—Redeemable Noncontrolling Interest Holders Temporary Equity, Stock Issued During Period, Value, New Issues U.K. Subsidiary Stock Plan U.K. Subsidiary Stock Plan [Member] U.K. Subsidiary Stock Plan Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Cash Dividends Per Share (usd per share) Cash dividends per share (usd per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Stock Award Activity Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Equity Equity Securities [Member] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Schedule of Consolidated Federated Funds VIE Schedule of Variable Interest Entities [Table Text Block] Treasury stock, shares (in shares) Beginning Balance (in shares) Ending Balance (in shares) Treasury Stock, Common, Shares Accumulated Other Comprehensive Income (Loss) Attributable to Federated Hermes, Inc. Shareholders Comprehensive Income (Loss) Note [Text Block] Equity Components [Axis] Equity Components [Axis] Distribution Other Cost and Expense, Operating Product and Service [Domain] Product and Service [Domain] Investments—Consolidated Investment Companies Related Party [Member] Class of Stock [Line Items] Class of Stock [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Class A Common Class A [Member] Entity Interactive Data Current Entity Interactive Data Current Less: Net Income (Loss) Attributable to the Noncontrolling Interests in Subsidiaries Net Income (Loss) Attributable to Noncontrolling Interest Variable Interest Entities [Line Items] Variable Interest Entities [Line Items] Variable Interest Entity [Line Items] Long-Term Deferred Tax Liability, net Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive Income Attributable to Federated Hermes, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Advertising and Promotional Marketing and Advertising Expense Termination Date Trading Arrangement Termination Date Noncontrolling Interest [Table] Noncontrolling Interest [Table] Remaining number of shares authorized to be repurchased (in shares) Share Repurchase Program, Remaining Authorized, Number of Shares Subsequent Events [Abstract] Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Intangible Assets Intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other Current Liabilities Other Liabilities, Current Other Long-Term Assets Other Assets, Noncurrent Alleged diminished value Investment, Total Decline In Value Investment, Total Decline In Value Document Type Document Type Cash Paid for Business Acquisitions, Net of Cash Acquired Payments to Acquire Businesses, Net of Cash Acquired Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Significant Accounting Policies Significant Accounting Policies [Text Block] (Gain) Loss on Disposal of Assets Gain (Loss) on Disposition of Assets Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Foreign Currency Translation Gain (Loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Percentage of value sought Investment, Ownership Percentage Investment, Ownership Percentage Income Before Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and Contingencies (Note (17)) Commitments and Contingencies FCP Fund Manager, L.P FCP Fund Manager, L.P [Member] FCP Fund Manager, L.P Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] (Loss) Gain on Securities [Line Items] Gain (Loss) on Securities [Line Items] Increase (Decrease) in Accounts Payable and Accrued Expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Financial Support, Capital Contributions Financial Support, Capital Contributions [Member] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Schedule of Classes of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value Measurements Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] Contingent Consideration Contingent Consideration [Member] Contingent Consideration [Member] Purchase of treasury stock (in shares) Purchase of Treasury Stock (in shares) Treasury Stock, Shares, Acquired Redeemable Noncontrolling Interests in Subsidiaries/ Temporary Equity Redeemable Noncontrolling Interests in Subsidiaries Temporary Equity [Member] Redeemable Noncontrolling Interests in Subsidiaries Temporary Equity Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Business minority interest acquired, percentage Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Geographical [Axis] Geographical [Axis] NAV Fair Value Measured at Net Asset Value Per Share [Member] Financial Liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Revenue risk premium and volatility Business Combination, Contingent Consideration, Liability, Measurement Input Legal Entity [Axis] Legal Entity [Axis] Mutual Fund Mutual Fund [Member] Liability Class [Axis] Liability Class [Axis] Purchase of Treasury Stock Purchase of treasury stock Treasury Stock, Value, Acquired, Cost Method Product Concentration Risk Product Concentration Risk [Member] Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Class B Common Stock Bonus Class B Common Stock Bonus [Member] Class B Common Stock Bonus [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Acquisition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Consolidation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Comprehensive Income Including the Noncontrolling Interests in Subsidiaries Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Subsequent Event [Table] Subsequent Event [Table] Payments to acquire business - cash portion Payments to Acquire Businesses, Gross Share-Based Compensation Expense Share-Based Payment Arrangement, Noncash Expense Total Right-of-Use Assets, net and Property and Equipment, net Property, Plant, and Equipment And Operating Lease Right-of-Use Asset, After Accumulated Depreciation And Amortization Property, Plant, and Equipment And Operating Lease Right-of-Use Asset, After Accumulated Depreciation And Amortization Compensation and Related Labor and Related Expense Customer [Domain] Customer [Domain] Investment, Name [Domain] Investment, Name [Domain] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Earnings Per Common Share—Basic (usd per share) Net Income Attributable to Federated Hermes Common Stock - Basic (usd per share) Earnings Per Share, Basic Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Fee waivers Fee Waivers Fee waivers and reimbursements or assumptions of expenses Measurement Input Type [Axis] Measurement Input Type [Axis] Purchases of Treasury Stock Payments for Repurchase of Common Stock Total Current Assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Commitment fee amount Debt Instrument, Unused Borrowing Capacity, Fee Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Number of VIEs consolidated Variable Interest Entity, Consolidated, Number Of Entities Variable Interest Entity, Consolidated, Number Of Entities Receivables Receivables—Affiliates Accounts Receivable, after Allowance for Credit Loss, Current Retained Earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Less: Comprehensive Income (Loss) Attributable to Redeemable Noncontrolling Interests in Subsidiaries Comprehensive Income Net of Tax Attributable to Redeemable Noncontrolling Interest The change in temporary equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the redeemable noncontrolling interests, if any. It includes all changes in temporary equity during a period except those resulting from subscription and redemption activity of investors, which are directly or indirectly attributable to that ownership interest in redeemable subsidiary equity which is not attributable to the parent. Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Balance, beginning of period Balance, end of period Temporary Equity, Including Noncontrolling Interest Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Acquisition-related future consideration liabilities Business Combination, Contingent Consideration, Liability Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Non-U.S. Non-US [Member] Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Other Comprehensive Income (Loss), net of tax Temporary Equity, Foreign Currency Translation Adjustments Edward Jones Edward Jones [Member] Edward Jones Derivative Contract [Domain] Derivative Contract [Domain] Concentration risk Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Redeemable Noncontrolling Interests in Subsidiaries Redeemable Noncontrolling Interest, Equity, Fair Value Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue benchmark Revenue from Contract with Customer, Product and Service Benchmark [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total Liabilities, Temporary Equity and Permanent Equity Liabilities and Equity Number of banks as lenders Number Of Banks As Lenders Number Of Banks As Lenders Net Realized Gains (Losses) Realized Investment Gains (Losses) Employee Stock Option Share-Based Payment Arrangement, Option [Member] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Increase (Decrease) in Other Liabilities Increase (Decrease) in Other Operating Liabilities Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Swing Line Swing Line [Member] Swing Line [Member] Asset Class [Axis] Asset Class [Axis] Related Party, Type [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Loss contingency, loss in period Loss Contingency Accrual, Loss (Reversal of Loss) Less: Restricted Cash and Restricted Cash Equivalents Recorded in Other Long-Term Assets Restricted Cash and Cash Equivalent, Noncurrent Additional Paid-In Capital from Treasury Stock Transactions Additional Paid in Capital Other, net Other Nonoperating Income (Expense) Other Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name PERMANENT EQUITY Permanent Equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Investment in wind farms Payments to Acquire Investments Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Long-Term Assets Assets, Noncurrent [Abstract] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Revenue, Performance Obligation [Domain] Revenue, Performance Obligation [Domain] [Domain] for Revenue, Performance Obligation [Axis] Class of Stock [Domain] Class of Treasury Stock [Domain] Class of Stock [Domain] Foreign Currency Translation Gain (Loss) Translation Adjustment Functional to Reporting Currency, Net of Tax, Period Increase (Decrease) Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Foreign Currency Forward Foreign Exchange Forward [Member] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total Financial Assets Assets, Fair Value Disclosure Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-in Capital from Treasury Stock Transactions Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Estimated fair value as of the acquisition date Business Combination, Contingency Recognized at Acquisition Date, Liability Assumed, Fair Value Unsecured Senior Notes Unsecured Senior Notes [Member] Unsecured Senior Notes Name Trading Arrangement, Individual Name Cash and Cash Equivalents Cash and Cash Equivalent Equity Assets Equity assets [Member] Funds and separate accounts that invest in a combination of underlying investments, primarily equity investments. Basis of Presentation Basis of Accounting [Text Block] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Schedule of Gains and Losses Recognized in Gain (Loss) on Securities, Net Gain (Loss) on Securities [Table Text Block] Stock Award Activity (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Net Income Including the Noncontrolling Interests in Subsidiaries Net Income Including the Noncontrolling Interests in Subsidiaries Net Income Including the Noncontrolling Interests in Subsidiaries Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Distributions to Noncontrolling Interests in Subsidiaries Payments of Distributions to Affiliates Current Assets Assets, Current [Abstract] Derivative liability Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Income Tax Provision Income tax provision Income Tax Expense (Benefit) Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Other Product and Service, Other [Member] Other Other [Member] Revenue from Equity Ownership Services Net Increase (Decrease) in Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Recent Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Net Income Net Income Attributable to Federated Hermes, Inc. Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Investments Investments [Member] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Accordion feature, available for borrowings Line Of Credit Facility, Accordion Feature, Available For Borrowings Line Of Credit Facility, Accordion Feature, Available For Borrowings Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Future Fixed Revenue from Stewardship, Real Estate Development Performance Obligations and Renewable Energy Project Development Obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Purchases of Investments—Affiliates and Other Purchases of investments - Affiliates and other Purchases of investments - Affiliates and other (Increase) Decrease in Receivables, net Increase (Decrease) in Receivables Administrative error related to unregistered shares Administrative Error Related To Unregistered Shares [Member] Administrative Error Related To Unregistered Shares Financial Support, Fee Waivers Financial Support, Waived Fees [Member] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Revenue Revenues [Abstract] Damages sought Loss Contingency, Damages Sought, Value Revenue, Performance Obligation [Axis] Revenue, Performance Obligation [Axis] Revenue, Performance Obligation [Axis] TEMPORARY EQUITY Temporary Equity Temporary Equity [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Hermes Infrastructure Fund II Hermes Infrastructure Fund II [Member] Hermes Infrastructure Fund II Financial Support to Nonconsolidated Legal Entity [Domain] Financial Support to Nonconsolidated Legal Entity [Domain]