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Affiliate Equity - Summary of Affiliate Recognized and Unrecognized Expense (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Affiliate Equity [Line Items]    
Non-controlling interests $ 12.6 $ 3.9
Affiliate equity expense $ 16.6 $ 6.0
Non- controlling Interests    
Unrecognized Affiliate Equity Expense [Abstract]    
Remaining Life (in years) 5 years 5 years
Non-Controlling Interest $ 84.6 $ 70.7
Affiliated Entity    
Affiliate Equity [Line Items]    
Controlling interest 4.0 2.1
Unrecognized Affiliate Equity Expense [Abstract]    
Controlling Interest $ 33.3 $ 31.3
Remaining Life (in years) 4 years 4 years