Derivatives and Fair Value Measurements (Details 3) - USD ($)		9 Months Ended
		Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		$ 0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements		(292,100,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	[1]	(32,300,000)
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value		0	$ 324,400,000
Level 1 to Level 2 transfers		0	0
Level 2 to Level 1 transfers		0	0
Commodity swap contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements		(139,400,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	[1]	15,700,000
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value		0	123,700,000
Foreign currency forward contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements		(152,700,000)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	[1]	(48,000,000)
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value		$ 0	200,700,000
Fair Value, Measurements, Recurring [Member]
Fair value of financial asset (liability) positions measured on a recurring basis
Assets And Liabilities Fair Value Disclosure			(324,400,000)
Fair Value, Measurements, Recurring [Member] | Commodity swap contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net			(123,700,000)
Fair Value, Measurements, Recurring [Member] | Foreign currency forward contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net			(200,700,000)
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair value of financial asset (liability) positions measured on a recurring basis
Assets And Liabilities Fair Value Disclosure			0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Commodity swap contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net			0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Foreign currency forward contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net			0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair value of financial asset (liability) positions measured on a recurring basis
Assets And Liabilities Fair Value Disclosure			0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Commodity swap contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net			0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Foreign currency forward contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net			0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair value of financial asset (liability) positions measured on a recurring basis
Assets And Liabilities Fair Value Disclosure			(324,400,000)
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Commodity swap contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net			(123,700,000)
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Foreign currency forward contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net			$ (200,700,000)

[1] Includes reorganization items and realized gains (losses)