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Derivatives - Effect on Income (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Gain (loss) on derivative |  |  |
Carrying Amount of Hedged Asset/(Liabilities) | $ 68,900,000 | $ 55,500,000 |
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Asset/(Liabilities) | 2,600,000 | (100,000) |
Revenue | 9,181,300,000 | 8,194,300,000 |
Cost of revenue | 8,937,900,000 | 7,962,900,000 |
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 | 5,100,000 | 7,100,000 |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | 14,600,000 | (3,400,000) |
Potential Collateral Requirements for Derivative Liabilities with Credit-Risk-Contingent Features |  |  |
Net derivatives liability positions with credit contingent features | 10,800,000 |  | $ 11,800,000
Maximum potential collateral requirements | 10,800,000 |  | 11,800,000
Collateral posted and held by our counterparties | 0 |  | $ 0
Revenue |  |  |
Gain (loss) on derivative |  |  |
Revenue | 9,181,300,000 | 8,194,300,000 |
Gains or Loss on fair value hedge relationships |  |  |
Hedged Item | 0 | 0 |
Derivatives designated as hedging instruments | 0 | 0 |
Revenue, Excluding Impact Of Hedges | 9,184,900,000 | 8,184,200,000 |
Cost of revenue |  |  |
Gain (loss) on derivative |  |  |
Cost of revenue | 8,937,900,000 | 7,962,900,000 |
Gains or Loss on fair value hedge relationships |  |  |
Hedged Item | 5,500,000 | (3,600,000) |
Derivatives designated as hedging instruments | (5,600,000) | 5,300,000 |
Total amount of income of expense line items excluding the impact of hedges | 8,956,000,000.0 | 7,971,400,000 |
Commodity contracts | Revenue |  |  |
Gains or Loss on fair value hedge relationships |  |  |
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income | (2,300,000) | 57,100,000 |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | (3,600,000) | (10,100,000) |
Commodity contracts | Cost of revenue |  |  |
Gains or Loss on fair value hedge relationships |  |  |
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income | 10,200,000 | (50,000,000.0) |
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | 18,200,000 | 6,800,000 |
Foreign currency contracts | Other Expense [Member] |  |  |
Gains or Loss on fair value hedge relationships |  |  |
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income | (2,800,000) | 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) | 7,200,000 | 8,300,000 |
Derivatives not designated as hedging instruments | Commodity contracts |  |  |
Gains or Loss on fair value hedge relationships |  |  |
Amount of Realized and Unrealized Gain (Loss) | 10,600,000 | 10,400,000 |
Derivatives not designated as hedging instruments | Commodity contracts | Revenue |  |  |
Gains or Loss on fair value hedge relationships |  |  |
Amount of Realized and Unrealized Gain (Loss) | 47,600,000 | 49,200,000 |
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) | (37,000,000.0) | (38,800,000) |
Derivatives not designated as hedging instruments | Foreign currency contracts |  |  |
Gains or Loss on fair value hedge relationships |  |  |
Amount of Realized and Unrealized Gain (Loss) | (3,400,000) | (2,000,000.0) |
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) | (600,000) | (500,000) |
Derivatives not designated as hedging instruments | Foreign currency contracts | Other Expense [Member] |  |  |
Gains or Loss on fair value hedge relationships |  |  |
Amount of Realized and Unrealized Gain (Loss) | (2,800,000) | (1,600,000) |
Accumulated gain (loss), cash flow hedge, including noncontrolling interest | Reclassification out of AOCI | Revenue |  |  |
Gain (loss) on derivative |  |  |
Revenue | (3,600,000) | (10,100,000) |
Accumulated gain (loss), cash flow hedge, including noncontrolling interest | Reclassification out of AOCI | Cost of revenue |  |  |
Gain (loss) on derivative |  |  |
Cost of revenue | $ 18,200,000 | $ 6,800,000 |

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