Consolidation - Narrative (Details) - USD ($)	12 Months Ended
	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