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Derivative Instruments - Effect on Income (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Carrying Amount of Hedged Asset/(Liabilities)	$ 44,500,000				$ 30,700,000				$ 44,500,000	$ 30,700,000
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Asset/(Liabilities)	4,900,000				2,300,000				4,900,000	2,300,000
Gain (loss) on derivative
Revenue	4,702,100,000	$ 4,482,700,000	$ 3,158,300,000	$ 8,015,200,000	9,358,100,000	$ 9,322,700,000	$ 9,459,400,000	$ 8,678,800,000	20,358,300,000	36,819,000,000.0	$ 39,750,300,000
Cost of revenue									19,506,500,000	35,707,000,000.0	38,731,800,000
Potential Collateral Requirements for Derivative Liabilities with Credit-Risk-Contingent Features
Net derivative liability positions with credit contingent features	20,000,000.0				45,600,000				20,000,000.0	45,600,000
Collateral posted and held by our counterparties	0				0				0	0
Maximum additional potential collateral requirements	$ 20,000,000.0				$ 45,600,000				20,000,000.0	45,600,000
Revenue
Gain (loss) on derivative
Revenue									20,358,300,000	36,819,000,000.0	39,750,300,000
Gain (Loss) on fair value hedge relationships
Total amount of income and expense line items excluding the impact of hedges, Revenue									20,327,000,000.0	36,827,500,000	39,773,700,000
Cost of revenue
Gain (loss) on derivative
Cost of revenue									19,506,500,000	35,707,000,000.0	38,731,800,000
Gain (Loss) on fair value hedge relationships
Total amount of income and expense line items excluding the impact of hedges, Cost of revenue									19,326,600,000	35,745,600,000	38,776,100,000
Interest expense and other financing costs, net
Gain (loss) on derivative
Interest Expense And Other Financing Costs									48,600,000
Gain (Loss) on fair value hedge relationships
Total amount of income and expense line items excluding the impact of hedges, Interest expense and other financing costs									48,100,000
Commodity contracts | Revenue
Gain (Loss) on fair value hedge relationships
Hedged Item									0	0	0
Derivatives designated as hedging instruments									0	0	0
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income									31,300,000	(8,500,000)	(23,500,000)
Commodity contracts | Cost of revenue
Gain (Loss) on fair value hedge relationships
Hedged Item									(8,200,000)	18,100,000	(1,600,000)
Derivatives designated as hedging instruments									9,400,000	(16,100,000)	500,000
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income									(181,100,000)	36,600,000	45,500,000
Commodity contracts | Interest expense and other financing costs, net
Gain (Loss) on fair value hedge relationships
Hedged Item									0
Derivatives designated as hedging instruments									0
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income									0
Interest rate contract | Revenue
Gain (Loss) on fair value hedge relationships
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income									0	0	0
Interest rate contract | Cost of revenue
Gain (Loss) on fair value hedge relationships
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income									0	0	0
Interest rate contract | Interest expense and other financing costs, net
Gain (Loss) on fair value hedge relationships
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income									(500,000)
Derivatives designated as hedging instruments
Gain (Loss) on fair value hedge relationships
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income									(150,400,000)	2,700,000	41,500,000
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income									(150,300,000)	28,100,000	20,900,000
Derivatives designated as hedging instruments | Commodity contracts | Revenue
Gain (Loss) on fair value hedge relationships
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income									(20,800,000)	(157,900,000)	130,300,000
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income									31,300,000	(8,500,000)	(23,500,000)
Derivatives designated as hedging instruments | Commodity contracts | Cost of revenue
Gain (Loss) on fair value hedge relationships
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income									(126,400,000)	160,600,000	(87,800,000)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income									(181,100,000)	36,600,000	45,500,000
Derivatives designated as hedging instruments | Foreign currency contracts | Interest expense and other financing costs, net
Gain (Loss) on fair value hedge relationships
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income									0	0	(1,100,000)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income									0	0	(1,100,000)
Derivatives designated as hedging instruments | Interest rate contract | Interest expense and other financing costs, net
Gain (Loss) on fair value hedge relationships
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income									(3,200,000)	0	0
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income									(500,000)	0	0
Derivatives not designated as hedging instruments
Gain (Loss) on fair value hedge relationships
Amount of Realized and Unrealized Gain (Loss)									97,500,000	46,900,000	34,500,000
Derivatives not designated as hedging instruments | Commodity contracts
Gain (Loss) on fair value hedge relationships
Amount of Realized and Unrealized Gain (Loss)									114,100,000	47,700,000	27,800,000
Derivatives not designated as hedging instruments | Commodity contracts | Revenue
Gain (Loss) on fair value hedge relationships
Amount of Realized and Unrealized Gain (Loss)									235,200,000	269,500,000	147,600,000
Derivatives not designated as hedging instruments | Commodity contracts | Cost of revenue
Gain (Loss) on fair value hedge relationships
Amount of Realized and Unrealized Gain (Loss)									(121,100,000)	(221,800,000)	(119,800,000)
Derivatives not designated as hedging instruments | Foreign currency contracts
Gain (Loss) on fair value hedge relationships
Amount of Realized and Unrealized Gain (Loss)									(16,600,000)	(700,000)	6,700,000
Derivatives not designated as hedging instruments | Foreign currency contracts | Revenue
Gain (Loss) on fair value hedge relationships
Amount of Realized and Unrealized Gain (Loss)									(3,200,000)	(300,000)	1,400,000
Derivatives not designated as hedging instruments | Foreign currency contracts | Interest expense and other financing costs, net
Gain (Loss) on fair value hedge relationships
Amount of Realized and Unrealized Gain (Loss)									$ (13,400,000)	$ (500,000)	$ 5,300,000

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The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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