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Consolidation - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Variable Interest Entities [Line Items]
Fee waivers	$ 128,000,000	$ 245,000,000	$ 326,500,000	$ 446,100,000
Variable Interest Entity Not Primary Beneficiary
Variable Interest Entities [Line Items]
Assets under managed investments	5,000,000,000		5,000,000,000		$ 8,000,000,000
Cash and Cash Equivalents | Variable Interest Entity Not Primary Beneficiary
Variable Interest Entities [Line Items]
Federated Hermes' maximum risk of loss in non-consolidated investment companies	108,400,000		108,400,000		170,600,000
Receivables - Affiliates | Variable Interest Entity Not Primary Beneficiary
Variable Interest Entities [Line Items]
Federated Hermes' maximum risk of loss in non-consolidated investment companies	800,000		800,000		$ 700,000
Financial Support, Fee Waivers
Variable Interest Entities [Line Items]
Money market funds which meet the scope exception of the consolidation guidance	$ 97,100,000	$ 208,200,000	261,900,000	376,300,000
Financial Support, Capital Contributions
Variable Interest Entities [Line Items]
Money market funds which meet the scope exception of the consolidation guidance			$ 0	$ 0

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