Derivatives and Fair Value Measurements (Details 1) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Monetization of foreign currency hedge positions		$ (25.0)	$ (14.9)		$ (136.9)
Gain (loss) recognized in other comprehensive income on derivative (effective portion)			(199.0)		(295.4)
Gain (loss) reclassified from other comprehensive income into income (effective portion)			(438.4)	[1]	(47.9)	[2]
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)			1.6		(1.7)
Gains realized on previously monetized foreign currency cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain reclassified to earnings for previously monetized foreign currency forward contracts			14.9		136.9
Operating costs and expenses [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(316.1)
Operating costs and expenses [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
loss reclassified from Accumulated OCI into income	[3]	(231.7)
loss recognized in income on derivatives		(84.4)
Commodity swap contracts [Member] | Operating costs and expenses [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(98.0)
Commodity swap contracts [Member] | Operating costs and expenses [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified into earnings, net		(9.0)
loss reclassified from Accumulated OCI into income	[3]	(86.1)
loss recognized in income on derivatives		(11.9)
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)			(77.0)		(194.5)
Gain (loss) reclassified from other comprehensive income into income (effective portion)			(122.0)		(20.6)
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)			1.6		(1.7)
Commodity swap contracts [Member] | Reorganization items [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(38.8)
Commodity swap contracts [Member] | Reorganization items [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
loss reclassified from Accumulated OCI into income		0.0
loss recognized in income on derivatives		(38.8)
Foreign currency forward contracts [Member] | Operating costs and expenses [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified into earnings, net		(13.6)
Derivative, Gain (Loss) on Derivative, Net		(142.9)
Foreign currency forward contracts [Member] | Operating costs and expenses [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
loss reclassified from Accumulated OCI into income	[3]	(145.6)
loss recognized in income on derivatives		2.7
Foreign currency forward 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)			(122.0)		(100.9)
Gain (loss) reclassified from other comprehensive income into income (effective portion)			(316.4)	[1]	(27.3)	[2]
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)			$ 0.0		$ 0.0
Foreign currency forward contracts [Member] | Reorganization items [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(36.4)
Foreign currency forward contracts [Member] | Reorganization items [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
loss reclassified from Accumulated OCI into income		0.0
loss recognized in income on derivatives		$ (36.4)

[1] (1) Includes the reclassification from "Accumulated other comprehensive loss" into earnings of $14.9 million of previously unrecognized gains on foreign currency cash flow hedge contracts monetized in the fourth quarter of 2012.

[2] Includes the reclassification from "Accumulated other comprehensive loss" into earnings of $136.9 million of previously unrecognized gains on foreign currency cash flow hedge contracts monetized in the fourth quarter of 2012.

[3] Includes the reclassification from "Accumulated other comprehensive loss" into earnings of $13.6 million and $9.0 million of previously unrecognized losses on foreign currency and fuel contracts, respectivley, monetized in first quarter of 2016.