Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Cash Flows [Abstract]
Use of restricted cash - acquisition of Eagle Ottawa	$ 0.0	$ (350.0)	$ 0.0
Use of restricted cash - repurchase of senior notes	0.0	(250.0)	0.0
Cash paid in conjunction with acquisition of Eagle Ottawa to settle pre-existing accounts payable		45.7
Income tax refunds received	$ 16.4	$ 11.9	$ 24.0