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Concentration Risk - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Concentration Risk [Line Items]
Voluntary yield-related fee waivers	$ 0	$ 0	$ 0	$ 85,300,000
Decrease in distribution expenses				66,500,000
Net negative pre-tax impact				$ 18,800,000
Product Concentration Risk | Revenue benchmark | Federated Hermes Government Obligations Fund
Concentration Risk [Line Items]
Concentration risk	14.00%	14.00%	14.00%	11.00%
Customer Concentration Risk | Revenue benchmark | Bank of New York Mellon Corporation
Concentration Risk [Line Items]
Concentration risk	11.00%	14.00%	11.00%	11.00%

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- Definition

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- Definition

Voluntary Yield-related Fee Waivers

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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