Derivatives and Fair Value Measurements (Details 1) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net				$ 4.1				$ 14.8
Unrealized Gain (Loss) on Derivatives and Commodity Contracts		$ (25.0)		0.0		$ 0.0		0.0
Operating costs and expenses [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in income on non-designated derivatives		(139.5)				(225.5)
Operating costs and expenses [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)				0.3				1.8
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net				171.2				16.8
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net				(106.2)	[1]			(211.5)	[2]
Operating costs and expenses [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
loss reclassified from Accumulated OCI into income		(62.4)	[3]			(141.1)	[4]
loss recognized in income on derivatives		(52.1)				(84.4)
Unrealized Gain (Loss) on Derivatives and Commodity Contracts		(25.0)				0.0
Commodity swap contracts [Member] | Operating costs and expenses [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in income on non-designated derivatives		(18.6)				(58.9)
Commodity swap contracts [Member] | Operating costs and expenses [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)				0.3				1.8
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net				54.1				35.8
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net				(25.4)	[1]			(57.1)	[2]
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				9.0
loss reclassified from Accumulated OCI into income		(22.2)	[3]			(47.0)	[4]
loss recognized in income on derivatives		(1.8)				(11.9)
Unrealized Gain (Loss) on Derivatives and Commodity Contracts		5.4				0.0
Commodity swap contracts [Member] | Reorganization items [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in income on non-designated derivatives		(38.8)				(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	[3]	0.0				0.0
loss recognized in income on derivatives		(38.8)				(38.8)
Unrealized Gain (Loss) on Derivatives and Commodity Contracts		0.0				0.0
Foreign currency forward contract [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				13.6
Gain recognized in income on non-designated derivatives		(45.7)				(91.4)
Foreign currency forward contract [Member] | Operating costs and expenses [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified from other comprehensive income into income (ineffective portion)				0.0				0.0
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net				117.1				(19.0)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net				$ (80.8)	[1]			$ (154.4)	[2]
Foreign currency forward contract [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		(40.2)	[3]			(94.1)	[4]
loss recognized in income on derivatives		24.9				2.7
Unrealized Gain (Loss) on Derivatives and Commodity Contracts		(30.4)				0.0
Foreign currency forward contract [Member] | Reorganization items [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain recognized in income on non-designated derivatives		(36.4)				(36.4)
Foreign currency forward contract [Member] | Reorganization items [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
loss reclassified from Accumulated OCI into income	[3]	0.0				0.0
loss recognized in income on derivatives		(36.4)				(36.4)
Unrealized Gain (Loss) on Derivatives and Commodity Contracts		$ 0.0				$ 0.0

[1] Includes the reclassification from "Accumulated other comprehensive loss" into earnings of $4.1 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 $14.8 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, respectively, monetized in the first quarter of 2016.

[4] 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, respectively, monetized in the first quarter of 2016.