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Variable Interest Entities (Details) - Variable Interest Entity, Not Primary Beneficiary
$ in Millions
9 Months Ended
Sep. 30, 2023
USD ($)
PassportCard/DavidShield  
Variable Interest Entity [Line Items]  
Ownership interest 53.80%
Partnership interest, carrying value $ 159.4
Elementum Holdings, L.P.  
Variable Interest Entity [Line Items]  
Ownership interest 26.60%
Partnership interest, carrying value $ 35.0
Limited Partnerships  
Variable Interest Entity [Line Items]  
Partnership interest, carrying value $ 239.2