Derivatives and Fair Value Measurements (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income on derivative (effective portion)	$ 208.0	[1]	$ 44.6
(Loss) gain reclassified from other comprehensive income into income (effective portion)	(21.0)	[1]	91.8
(Loss) gain reclassified from other comprehensive income into income (ineffective portion)	(0.2)		0.2
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in income on non-designated derivatives	0		0
Gains realized on previously monetized foreign currency cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency cash flow hedge gains reclassified to earnings	40.9
Foreign Currency Forward Contract [Member] | Operating costs and expenses [Member] | Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income on derivative (effective portion)	216.5	[1]	38.7
(Loss) gain reclassified from other comprehensive income into income (effective portion)	(18.8)	[1]	85.1
(Loss) gain reclassified from other comprehensive income into income (ineffective portion)	0		0
Foreign Currency Forward Contract [Member] | Operating costs and expenses [Member] | Cash flow hedges [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in income on non-designated derivatives	0		0
Commodity swap contracts [Member] | Operating costs and expenses [Member] | Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income on derivative (effective portion)	(8.5)		5.9
(Loss) gain reclassified from other comprehensive income into income (effective portion)	(2.2)		6.7
(Loss) gain reclassified from other comprehensive income into income (ineffective portion)	(0.2)		0.2
Commodity swap contracts [Member] | Operating costs and expenses [Member] | Cash flow hedges [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in income on non-designated derivatives	$ 0		$ 0

[1] Includes the reclassification from "Accumulated other comprehensive loss" into earnings of $40.9 million of previously unrecognized gains on foreign currency cash flow hedge contracts monetized in the fourth quarter of 2012.