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Other Long-term Liabilities - Schedule of Other Long-term Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Other Liabilities Noncurrent [Line Items]    
Asset retirement obligations $ 68.0 $ 64.6
Mandatorily redeemable preferred interests 71.9 68.5
Deferred revenue 69.0 69.8
Other liabilities 15.2 12.2
Total long-term liabilities 688.9 $ 215.1
Permian Acquisition [Member]    
Other Liabilities Noncurrent [Line Items]    
Permian Acquisition contingent consideration $ 464.8