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Consolidation - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Variable Interest Entity [Line Items] |  |  |
Fee waivers | $ 917,900,000 | $ 675,300,000 | $ 427,300,000
Non-Consolidated Variable Interest Entity, Not Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Redeemable Noncontrolling Interest From Investments | 5,000,000 |  |
AUM for nonconsolidated Federated Hermes Funds | 8,000,000,000 | 9,100,000,000 |
Cash and Cash Equivalents | Non-Consolidated Variable Interest Entity, Not Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Federated Hermes' maximum risk of loss | 170,600,000 | 106,000,000 |
Accounts Receivable | Non-Consolidated Variable Interest Entity, Not Primary Beneficiary |  |  |
Variable Interest Entity [Line Items] |  |  |
Federated Hermes' maximum risk of loss | 700,000 | 400,000 |
Financial Support, Fee Waivers |  |  |
Variable Interest Entity [Line Items] |  |  |
Money market funds which meet the scope exception of the consolidation guidance | 775,600,000 | 537,800,000 | 311,600,000
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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