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Derivatives and Fair Value of Financial Instruments - Gain (Loss) on Derivatives (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Commodities |  |  |
Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statements of Comprehensive Income |  |  |
Gains (losses) on derivatives | $ (12) | $ (9) | $ 21
Commodities | Cost of sales |  |  |
Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statements of Comprehensive Income |  |  |
Gains (losses) on derivatives | (12) | (9) |
Foreign currencies | Cost of sales |  |  |
Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statements of Comprehensive Income |  |  |
Gains (losses) on derivatives | 2 | (7) |
Foreign currencies | Foreign currency gains (losses), net |  |  |
Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statements of Comprehensive Income |  |  |
Gains (losses) on derivatives | 1 | $ (1) |
Equity futures contract | Other investment income (loss), net |  |  |
Amount of gain or (loss) recognized for each type of derivative and its location in the Consolidated Statements of Comprehensive Income |  |  |
Gains (losses) on derivatives | $ (6) |  |

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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