Debt Debt - Credit Facility (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 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	(5.2)	$ (13.5)	(2.8)	$ (13.5)
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	33.0		33.0		$ 17.6
Letters of Credit Outstanding, Amount	6.3		6.3
Receivables Facility Remaining Borrowing Capacity	79.6		79.6
Receivables facility maximum borrowing availability	118.9		118.9
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