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Commitments and Contingencies (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Commitments and Contingencies  
Co-investment commitments in partnership $ 156.3
Equity Method Investee | Undisclosed Affiliate  
Commitments and Contingencies  
Ownership percentage held by minority interest in affiliated 14.00%
Payments for Achievement of Financial Targets  
Commitments and Contingencies  
Total contingent payments $ 185.0
Contingent payments in year one 37.5
Contingent payments after year one 147.5
Expected payments 13.0
Payment contingent on not meeting financial targets (up to) 12.5
Payment contingent on exercise of option to reduce ownership percentage $ 25.0