Stockholders' Equity - Reclassification out of accumulated other comprehensive income (Details) - USD ($) $ in Millions		3 Months Ended						9 Months Ended
		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Cost of sales		$ 308.3			$ 368.3			$ 1,023.3	$ 1,082.4
Interest Expense		10.0			24.0			29.6	71.3
Total before tax		(143.5)		$ (82.8)	(35.7)		$ (32.9)	(229.7)	(76.6)
Tax benefit		5.3		(121.5)	6.1		9.5	(116.9)	17.3
Net (loss) income		(140.0)		(207.5)	4.8		(8.4)	(352.4)	19.7
Reclassification out of Accumulated Other Comprehensive Income
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Net of Tax		(1.3)			(4.3)			(7.9)	(13.3)
Gains and Losses on Cash Flow Hedges
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Net of Tax		(0.2)	$ 0.1	(4.3)	(2.9)	$ (3.3)	(2.8)
Gains and Losses on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Total before tax		(0.2)			(4.6)			(5.5)	(14.4)
Tax benefit		0.0			1.7			1.1	5.4
Net (loss) income		(0.2)			(2.9)			(4.4)	(9.0)
Gains and Losses on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Foreign exchange contracts
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Cost of sales					(2.9)				(10.0)
Gains and Losses on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Commodity contracts
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Cost of sales		(0.2)			(1.1)			(1.2)	(2.5)
Gains and Losses on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Interest rate swap contracts
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Interest Expense		0.0			(0.6)			(4.3)	(1.9)
Pension & Postretirement
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Net of Tax		(1.1)	$ (1.2)	$ (1.2)	(1.4)	$ (1.4)	$ (1.4)
Pension & Postretirement | Reclassification out of Accumulated Other Comprehensive Income
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Total before tax	[1]	(1.1)			(1.9)			(3.5)	(5.8)
Tax benefit		0.0			0.5			0.0	1.5
Net of Tax		(1.1)			(1.4)			(3.5)	(4.3)
Actuarial losses | Reclassification out of Accumulated Other Comprehensive Income
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Total before tax	[1]	$ (1.1)			$ (1.9)			$ (3.5)	$ (5.8)

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 17, "Employee Benefit Plans," for further details).