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Affiliate Equity - Summary of Affiliate Recognized and Unrecognized Expense (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Affiliate Equity [Line Items]      
Affiliate equity expense $ 16.6 $ 10.7  
Non-controlling Interests      
Affiliate Equity [Line Items]      
Non-controlling interests $ 13.8 8.5  
Unrecognized Affiliate Equity Expense [Abstract]      
Remaining Life 6 years   6 years
Non-controlling Interests $ 126.0   $ 124.6
Affiliated Entity      
Affiliate Equity [Line Items]      
Controlling interest 2.8 $ 2.2  
Unrecognized Affiliate Equity Expense [Abstract]      
Controlling Interest $ 42.5   $ 40.9
Remaining Life 4 years   4 years