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Related Party Transactions (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Related Party Transactions    
Other liabilities $ 253.3 $ 149.4
Non-controlling interests 784.1 806.9
Prior Owner | Private Equity Investment Partnerships of Affiliate    
Related Party Transactions    
Other liabilities 66.9 67.8
Non-controlling interests 2.1 2.5
Affiliated Entity | Other Liabilities    
Related Party Transactions    
Contingent payment arrangements liability $ 8.9 $ 8.6