Debt Debt - Credit Facility (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 150.0			$ 150.0
Loss on extinguishment of debt	(11.4)		$ (7.8)	(14.2)	$ (21.3)
Line of Credit Facility, Amount Outstanding	0.0			0.0
Line of Credit Facility, Remaining Borrowing Capacity	150.0			150.0
Receivables facility amount outstanding	23.5			23.5		$ 17.6
Letters of Credit Outstanding, Amount	6.3			6.3
Receivables Facility Remaining Borrowing Capacity	90.2			90.2
Receivables facility maximum borrowing availability	120.0			120.0
Receivables facility maximum borrowing capacity	$ 120.0			$ 120.0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Loss on extinguishment of debt		$ 1.7