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Consolidation - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Variable Interest Entity [Line Items] |  |  |
Fee waivers | $ 504,500,000 | $ 563,200,000 | $ 917,900,000
Non-Consolidated Variable Interest Entity, Not Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
AUM for nonconsolidated Federated Hermes Funds | 9,300,000,000 | 5,400,000,000 |
Cash and Cash Equivalents | Non-Consolidated Variable Interest Entity, Not Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Federated Hermes' maximum risk of loss | 133,900,000 | 101,700,000 |
Accounts Receivable | Non-Consolidated Variable Interest Entity, Not Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Federated Hermes' maximum risk of loss | 1,100,000 | 700,000 |
Financial Support, Fee Waivers |  |  |
Variable Interest Entity [Line Items] |  |  |
Money market funds which meet the scope exception of the consolidation guidance | 389,300,000 | 440,700,000 | 775,600,000
Financial Support, Capital Contributions |  |  |
Variable Interest Entity [Line Items] |  |  |
Money market funds which meet the scope exception of the consolidation guidance | $ 0 | $ 0 | $ 0

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