Consolidation - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Fee waivers	$ 428,000,000.0	$ 504,500,000	$ 563,200,000
Other current assets	4,796,000	5,900,000
Non-Consolidated Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
AUM for nonconsolidated Federated Hermes Funds	10,000,000,000.0	9,300,000,000
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Other current assets	1,200,000	300,000
Variable Interest Entity, Primary Beneficiary | Foreign Currency Forward
Variable Interest Entity [Line Items]
Derivative asset	35,700,000
Derivative liability	35,600,000
Other current assets	100,000
Cash and Cash Equivalents | Non-Consolidated Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Federated Hermes' maximum risk of loss	161,100,000	133,900,000
Accounts Receivable | Non-Consolidated Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Federated Hermes' maximum risk of loss	1,700,000	1,100,000
Financial Support, Fee Waivers
Variable Interest Entity [Line Items]
Money market funds which meet the scope exception of the consolidation guidance	319,500,000	389,300,000	440,700,000
Financial Support, Capital Contributions
Variable Interest Entity [Line Items]
Money market funds which meet the scope exception of the consolidation guidance	$ 0	$ 0	$ 0