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Derivatives - Effect on Income (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Gain (loss) on derivative |  |  |  |  |
Carrying Amount of Hedged Asset/(Liabilities) | $ 56,400,000 | $ 50,900,000 | $ 56,400,000 | $ 50,900,000 |
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Asset/(Liabilities) | 1,900,000 | 2,700,000 | 1,900,000 | 2,700,000 |
Revenue | 10,150,800,000 | 8,086,200,000 | 19,332,200,000 | 16,280,400,000 |
Cost of revenue | 9,904,700,000 | 7,855,200,000 | 18,842,600,000 | 15,818,000,000.0 |
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 | (3,700,000) | 5,400,000 | 1,300,000 | 12,500,000 |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | (10,200,000) | 5,400,000 | 4,500,000 | 2,000,000.0 |
Potential Collateral Requirements for Derivative Liabilities with Credit-Risk-Contingent Features |  |  |  |  |
Net derivatives liability positions with credit contingent features | 13,000,000.0 |  | 13,000,000.0 |  | $ 11,800,000
Maximum potential collateral requirements | 13,000,000.0 |  | 13,000,000.0 |  | 11,800,000
Collateral posted and held by our counterparties | 0 |  | 0 |  | $ 0
Revenue |  |  |  |  |
Gain (loss) on derivative |  |  |  |  |
Revenue | 10,150,800,000 | 8,086,200,000 | 19,332,200,000 | 16,280,400,000 |
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 | 10,171,200,000 | 8,070,200,000 | 19,356,100,000 | 16,274,700,000 |
Cost of revenue |  |  |  |  |
Gain (loss) on derivative |  |  |  |  |
Cost of revenue | 9,904,700,000 | 7,855,200,000 | 18,842,600,000 | 15,818,000,000.0 |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Hedged Item | 11,300,000 | 1,500,000 | 16,700,000 | (2,000,000.0) |
Derivatives designated as hedging instruments | (10,900,000) | 1,400,000 | (16,500,000) | 6,700,000 |
Total amount of income and expense line items excluding the impact of hedges, Cost of Revenue | 9,915,200,000 | 7,847,500,000 | 18,871,200,000 | 15,818,900,000 |
Commodity contracts | Revenue |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income | (25,300,000) | 49,300,000 | (27,600,000) | 106,400,000 |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | (20,300,000) | 15,900,000 | (23,900,000) | 5,800,000 |
Commodity contracts | Cost of revenue |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income | 19,500,000 | (43,900,000) | 29,700,000 | (93,900,000) |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | 10,200,000 | (10,600,000) | 28,400,000 | (3,800,000) |
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 | 2,100,000 | 0 | (800,000) | 0 |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | 0 | 0 | 0 | 0 |
Derivatives not designated as hedging instruments |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Realized and Unrealized Gain (Loss) | (2,700,000) | 15,200,000 | 4,500,000 | 23,600,000 |
Derivatives not designated as hedging instruments | Commodity contracts |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Realized and Unrealized Gain (Loss) | (10,400,000) | 21,700,000 | 300,000 | 32,100,000 |
Derivatives not designated as hedging instruments | Commodity contracts | Revenue |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Realized and Unrealized Gain (Loss) | (3,600,000) | 19,100,000 | 44,000,000.0 | 68,200,000 |
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) | (6,800,000) | 2,600,000 | (43,800,000) | (36,200,000) |
Derivatives not designated as hedging instruments | Foreign currency contracts |  |  |  |  |
Gains or Loss on fair value hedge relationships |  |  |  |  |
Amount of Realized and Unrealized Gain (Loss) | 7,700,000 | (6,500,000) | 4,200,000 | (8,500,000) |
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) | 1,500,000 | (1,600,000) | 900,000 | (2,100,000) |
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) | 6,200,000 | (4,800,000) | 3,400,000 | (6,400,000) |
Accumulated gain (loss), cash flow hedge, including noncontrolling interest | Reclassification out of AOCI | Revenue |  |  |  |  |
Gain (loss) on derivative |  |  |  |  |
Revenue | (20,300,000) | 15,900,000 | (23,900,000) | 5,800,000 |
Accumulated gain (loss), cash flow hedge, including noncontrolling interest | Reclassification out of AOCI | Cost of revenue |  |  |  |  |
Gain (loss) on derivative |  |  |  |  |
Cost of revenue | $ 10,200,000 | $ (10,600,000) | $ 28,400,000 | $ (3,800,000) |

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