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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]      
Additional equity interests acquired   10.00% 10.00%
Federated Hermes Limited | Class B      
Business Acquisition [Line Items]      
Conversion of stock, amount converted   $ 47.5 £ 36.4
C W Henderson And Associates      
Business Acquisition [Line Items]      
Payments to acquire business $ 28.1    
Maximum contingent purchase price payments $ 17.6    
Maturity of contingent purchase price payments, term 5 years