Financial Instruments and Risk Management (Effect of Derivative Instruments on the Consolidated Statements of Operations Derivatives in Cash Flow Hedging Relationships) (Details) - Cash flow hedging relationships - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Reclassified from AOCE into Earnings (Effective Portion)	$ (6.2)	$ (53.0)	$ (41.1)
Amount of Gain Excluded from the Assessment of Hedge Effectiveness	(3.3)	33.5		$ 45.1
Foreign currency forward contracts | Net sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Reclassified from AOCE into Earnings (Effective Portion)	1.1	(44.3)	(40.3)
Foreign currency forward contracts | Other income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Excluded from the Assessment of Hedge Effectiveness	(3.3)	33.5		$ 45.1
Interest rate swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Reclassified from AOCE into Earnings (Effective Portion)	$ (7.3)	$ (8.7)	$ (0.8)