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Affiliate Equity - Summary of Affiliate Recognized and Unrecognized Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Affiliate Equity [Line Items]          
Affiliate equity compensation expense $ 9.5 $ 10.2 $ 34.7 $ 26.8  
Non- controlling Interests          
Affiliate Equity [Line Items]          
Non-controlling interests 6.8 5.1 $ 27.6 18.9  
Unrecognized Affiliate Equity Expense [Abstract]          
Remaining Life     5 years   5 years
Non-controlling Interests 109.2   $ 109.2   $ 109.7
Affiliated Entity          
Affiliate Equity [Line Items]          
Controlling interest 2.7 $ 5.1 7.1 $ 7.9  
Unrecognized Affiliate Equity Expense [Abstract]          
Controlling Interest $ 49.1   $ 49.1   $ 35.9
Remaining Life     5 years   4 years