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Concentration Risk - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Concentration Risk [Line Items] |  |  |  |
Voluntary yield-related fee waivers | $ 0 | $ 9,500,000 | $ 0 | $ 85,300,000
Decrease in distribution expenses |  | 9,000,000 |  | 66,500,000
Net negative pre-tax impact |  | $ 500,000 |  | $ 18,800,000
Product Concentration Risk | Revenue benchmark | Federated Hermes Government Obligations Fund |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk | 13.00% | 11.00% | 14.00% | 9.00%
Customer Concentration Risk | Revenue benchmark | Bank of New York Mellon Corporation |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk | 11.00% | 12.00% | 11.00% | 9.00%

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- Definition Fee Waivers Net Of Distribution Expenses + References No definition available. + Details
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