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Consolidated Statements of Cash Flows (Parenthetical) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Statement of Cash Flows [Abstract]      
Use of restricted cash - acquisition of Eagle Ottawa $ (350.0) $ 0.0 $ 0.0
Use of restricted cash - repurchase of senior notes (250.0) 0.0 0.0
Cash paid in conjunction with acquisition of Eagle Ottawa to settle pre-existing accounts payable 45.7    
Refunds received $ 11.9 $ 24.0 $ 12.6