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Business Combination and Equity Acquisition - Narrative (Details) £ in Millions, $ in Millions | Oct. 01, 2022 USD ($) | Mar. 14, 2022 USD ($) | Mar. 14, 2022 GBP (£)
--- | --- | --- | ---
Federated Hermes Limited |  |  |
Business Acquisition [Line Items] |  |  |
Ownership percentage |  | 100.00% | 100.00%
Federated Hermes Limited |  |  |
Business Acquisition [Line Items] |  |  |
Additional equity interests acquired |  | 10.00% | 10.00%
Federated Hermes Limited | Class B Shares |  |  |
Business Acquisition [Line Items] |  |  |
Conversion of stock, amount converted |  | $ 47.5 | £ 36.4
C.W. Henderson and Associates | Subsequent Event |  |  |
Business Acquisition [Line Items] |  |  |
Acquisition price | $ 28.0 |  |
Maximum contingent purchase price payments | $ 17.6 |  |
Maturity of contingent purchase price payments | 5 years |  |

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