Derivative Instruments - Effect on Income (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Carrying Amount of Hedged Asset/(Liabilities)	$ 12,800,000		$ 30,700,000
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Asset/(Liabilities)	(14,500,000)		2,300,000
Gain (loss) on derivative
Revenue	8,015,200,000	$ 8,678,800,000
Cost of revenue	7,756,400,000	8,427,700,000
Gains or Loss on fair value hedge relationships:
Gain (Loss) recognized in earnings related to fair value or cash flow hedges excluded from assessment of hedge effectiveness	0	0
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income	34,900,000	(24,100,000)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	12,900,000	(12,200,000)
Potential Collateral Requirements for Derivative Liabilities with Credit-Risk-Contingent Features
Net derivative liability positions with credit contingent features	95,200,000		45,600,000
Collateral posted and held by our counterparties	(48,200,000)		0
Maximum additional potential collateral requirements	47,000,000.0		$ 45,600,000
Revenue
Gain (loss) on derivative
Revenue	8,015,200,000	8,678,800,000
Gains or Loss on fair value hedge relationships:
Total amount of income and expense line items excluding the impact of hedges, Revenue	8,001,100,000	8,682,600,000
Cost of revenue
Gain (loss) on derivative
Cost of revenue	7,756,400,000	8,427,700,000
Gains or Loss on fair value hedge relationships:
Total amount of income and expense line items excluding the impact of hedges, Cost of Revenue	7,750,500,000	8,422,100,000
Interest expense and other financing costs, net
Gain (loss) on derivative
Interest expense and other financing costs, net	16,200,000	20,500,000
Gains or 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	16,200,000	20,500,000
Commodity contracts | Revenue
Gains or Loss on fair value hedge relationships:
Hedged Item	0	0
Derivatives designated as hedging instruments	0	0
Amount of Gain (Loss) Reclassified from AOCI into Income	14,000,000.0	(3,800,000)
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income	334,100,000	(220,500,000)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	14,000,000.0	(3,800,000)
Commodity contracts | Cost of revenue
Gains or Loss on fair value hedge relationships:
Hedged Item	(23,200,000)	16,200,000
Derivatives designated as hedging instruments	18,500,000	(13,500,000)
Amount of Gain (Loss) Reclassified from AOCI into Income	(1,200,000)	(8,400,000)
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income	(297,700,000)	196,400,000
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	(1,200,000)	(8,400,000)
Commodity contracts | Interest expense and other financing costs, net
Gains or Loss on fair value hedge relationships:
Hedged Item	0	0
Derivatives designated as hedging instruments	0	0
Amount of Gain (Loss) Reclassified from AOCI into Income	0	0
Interest rate contracts | Revenue
Gains or Loss on fair value hedge relationships:
Amount of Gain (Loss) Reclassified from AOCI into Income	0	0
Interest rate contracts | Cost of revenue
Gains or Loss on fair value hedge relationships:
Amount of Gain (Loss) Reclassified from AOCI into Income	0	0
Interest rate contracts | Interest expense and other financing costs, net
Gains or Loss on fair value hedge relationships:
Amount of Gain (Loss) Reclassified from AOCI into Income	0	0
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income	(1,500,000)	0
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	0	0
Derivatives not designated as hedging instruments
Gains or Loss on fair value hedge relationships:
Amount of Realized and Unrealized Gain (Loss)	113,500,000	9,500,000
Derivatives not designated as hedging instruments | Commodity contracts
Gains or Loss on fair value hedge relationships:
Amount of Realized and Unrealized Gain (Loss)	94,500,000	9,100,000
Derivatives not designated as hedging instruments | Commodity contracts | Revenue
Gains or Loss on fair value hedge relationships:
Amount of Realized and Unrealized Gain (Loss)	79,100,000	75,000,000.0
Derivatives not designated as hedging instruments | Commodity contracts | Cost of revenue
Gains or Loss on fair value hedge relationships:
Amount of Realized and Unrealized Gain (Loss)	15,400,000	(65,900,000)
Derivatives not designated as hedging instruments | Foreign currency contracts
Gains or Loss on fair value hedge relationships:
Amount of Realized and Unrealized Gain (Loss)	18,900,000	400,000
Derivatives not designated as hedging instruments | Foreign currency contracts | Revenue
Gains or Loss on fair value hedge relationships:
Amount of Realized and Unrealized Gain (Loss)	500,000	(100,000)
Derivatives not designated as hedging instruments | Foreign currency contracts | Interest expense and other financing costs, net
Gains or Loss on fair value hedge relationships:
Amount of Realized and Unrealized Gain (Loss)	$ 18,500,000	$ 500,000