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Retirement Plans and Profit Sharing Arrangements - U.S. Non-Advisor Employee Pension Plan General Information (Details) - Pension Plans - Retirement Plan
12 Months Ended
Dec. 31, 2023
Defined Benefit Plans  
Maturity period of U.S. Treasury Note 5 years
Minimum fixed interest crediting rate 5.00%
Maximum fixed interest crediting rate 10.00%
Period of service to be fully vested in employer defined benefit plan contributions 3 years
Minimum  
Defined Benefit Plans  
Percentage of eligible compensation credited to participant account balances 2.50%
Maximum  
Defined Benefit Plans  
Percentage of eligible compensation credited to participant account balances 10.00%