Reclassifications from AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ (5.7)	$ (3.0)	$ (8.7)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	1.6	2.2	6.0
Reclassification of hedging activities into earnings, net	(4.1)	(0.8)	(2.7)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(4.5)	(3.0)	(3.5)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	0.3	0.3	0.3
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	(4.2)	(2.7)	(3.2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	1.0	0.7	0.9
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax	(3.2)	(2.0)	(2.3)
Other Comprehensive Income (Loss), Net of Tax	(7.3)	(2.8)	(5.0)
Cost of Sales [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	$ (5.7)	$ (3.0)	$ (8.7)
Gross Pension Costs Reclassified to Net Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Pension and Postretirement Plans, Income Statement Location of Net Periodic Pension Expense Reclassified from Accumulated OCI	(a)
Income Before Taxes [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI	Income before income taxes
Pension and Postretirement Plans, Income Statement Location of Net Periodic Pension Expense Reclassified from Accumulated OCI	Income before income taxes
Tax (Expense) Benefit [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI	Income tax provision (benefit)
Pension and Postretirement Plans, Income Statement Location of Net Periodic Pension Expense Reclassified from Accumulated OCI	Income tax provision (benefit)
Net Income (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI	Net income
Pension and Postretirement Plans, Income Statement Location of Net Periodic Pension Expense Reclassified from Accumulated OCI	Net income
Foreign Exchange Contract [Member] | Cost of Sales [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI	Cost of sales