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Investments - Interest and Other Income of Consolidated Funds (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Investments [Abstract]        
Interest income from investments $ 59.2 $ 56.6 $ 115.7 $ 113.5
Other income 4.0 5.5 9.2 9.7
Total $ 63.2 $ 62.1 $ 124.9 $ 123.2