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Derivatives - Effect on Income (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Gain (loss) on derivative |  |  |  |  |
Carrying Amount of Hedged Asset/(Liabilities) | $ 68,500,000 | $ 50,900,000 | $ 68,500,000 | $ 50,900,000 |
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Asset/(Liabilities) | 4,700,000 | 2,700,000 | 4,700,000 | 2,700,000 |
Revenue | 10,429,500,000 | 8,543,000,000.0 | 29,761,700,000 | 24,823,400,000 |
Cost of revenue | 10,162,800,000 | 8,303,100,000 | 29,005,400,000 | 24,121,100,000 |
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 | 0 | 0 |
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income | 300,000 | (14,300,000) | 1,600,000 | (1,800,000) |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | 5,500,000 | (5,600,000) | 9,900,000 | (3,600,000) |
Potential Collateral Requirements for Derivative Liabilities with Credit-Risk-Contingent Features |  |  |  |  |
Net derivatives liability positions with credit contingent features | 11,100,000 |  | 11,100,000 |  | $ 11,800,000
Maximum potential collateral requirements | 11,100,000 |  | 11,100,000 |  | 11,800,000
Collateral posted and held by our counterparties | 0 |  | 0 |  | $ 0
Revenue |  |  |  |  |
Gain (loss) on derivative |  |  |  |  |
Revenue | 10,429,500,000 | 8,543,000,000.0 | 29,761,700,000 | 24,823,400,000 |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Hedged Item | 0 | 0 | 0 | 0 |
Derivatives designated as hedging instruments | 0 | 0 | 0 | 0 |
Total amount of income and expense line items excluding the impact of hedges, Revenue | 10,436,100,000 | 8,551,400,000 | 29,792,300,000 | 24,826,000,000.0 |
Cost of revenue |  |  |  |  |
Gain (loss) on derivative |  |  |  |  |
Cost of revenue | 10,162,800,000 | 8,303,100,000 | 29,005,400,000 | 24,121,100,000 |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Hedged Item | 8,700,000 | 800,000 | 25,400,000 | (1,300,000) |
Derivatives designated as hedging instruments | (7,100,000) | (23,100,000) | (23,500,000) | (16,400,000) |
Total amount of income and expense line items excluding the impact of hedges, Cost of Revenue | 10,177,200,000 | 8,283,600,000 | 29,048,400,000 | 24,102,500,000 |
Commodity contracts | Revenue |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income | (46,400,000) | (83,000,000.0) | (74,100,000) | 23,300,000 |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | (6,600,000) | (8,400,000) | (30,600,000) | (2,600,000) |
Commodity contracts | Cost of revenue |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income | 46,900,000 | 68,700,000 | 77,000,000.0 | (25,200,000) |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | 12,700,000 | 2,800,000 | 41,100,000 | (1,000,000.0) |
Foreign currency contracts | Other Income (expense) net |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income | (100,000) | 0 | (1,300,000) | 0 |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | (700,000) | 0 | (700,000) | 0 |
Derivatives not designated as hedging instruments |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Realized and Unrealized Gain (Loss) | (5,800,000) | 13,200,000 | (1,300,000) | 36,800,000 |
Derivatives not designated as hedging instruments | Commodity contracts |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Realized and Unrealized Gain (Loss) | (3,900,000) | 16,700,000 | (3,600,000) | 48,800,000 |
Derivatives not designated as hedging instruments | Commodity contracts | Revenue |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Realized and Unrealized Gain (Loss) | 17,500,000 | (31,200,000) | 61,600,000 | 37,100,000 |
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) | (21,400,000) | 47,900,000 | (65,200,000) | 11,700,000 |
Derivatives not designated as hedging instruments | Foreign currency contracts |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Realized and Unrealized Gain (Loss) | (1,900,000) | (3,500,000) | 2,300,000 | (12,000,000.0) |
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) | 200,000 | (1,000,000.0) | 1,100,000 | (3,100,000) |
Derivatives not designated as hedging instruments | Foreign currency contracts | Other Income (expense) net |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Realized and Unrealized Gain (Loss) | (2,100,000) | (2,500,000) | 1,200,000 | (8,900,000) |
Accumulated gain (loss), cash flow hedge, including noncontrolling interest | Reclassification out of AOCI | Revenue |  |  |  |  |
Gain (loss) on derivative |  |  |  |  |
Revenue | (6,600,000) | (8,400,000) | (30,600,000) | (2,600,000) |
Accumulated gain (loss), cash flow hedge, including noncontrolling interest | Reclassification out of AOCI | Cost of revenue |  |  |  |  |
Gain (loss) on derivative |  |  |  |  |
Cost of revenue | $ 12,700,000 | $ 2,800,000 | $ 41,100,000 | $ (1,000,000.0) |

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