Fair Value of Financial Instruments-Derivative Instruments, Gain (Loss) by Hedging Relationship, Income Statement Location (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Total pre-tax gain (loss)	$ 2.7	$ (7.4)
Cost of Sales [Member] | Derivatives Designated as Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total pre-tax gain (loss)	1.4	(4.7)
Cost of Sales [Member] | Derivatives not Designated as Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total pre-tax gain (loss)	1.4	0
Other Costs [Member] | Derivatives not Designated as Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total pre-tax gain (loss)	$ (0.1)	$ (2.7)