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Financial Instruments - Economic Hedges (Details) - Derivatives Not Designated as Hedging Instruments - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivatives instruments, pre-tax gains/(losses) recognized in earnings | $ 80 | $ 141
Currency exchange contracts | Intercompany loans and forecasted interest payments | Interest and other expense, net |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivatives instruments, pre-tax gains/(losses) recognized in earnings | 61 | 7
Currency exchange contracts | Forecasted transactions | Interest and other expense, net |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivatives instruments, pre-tax gains/(losses) recognized in earnings | 0 | (5)
Currency exchange contracts | Forecasted transactions | Cost of sales |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivatives instruments, pre-tax gains/(losses) recognized in earnings | 5 | (7)
Currency exchange contracts | Forecasted transactions | Selling, general and administrative expenses |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivatives instruments, pre-tax gains/(losses) recognized in earnings | 0 | (3)
Commodity contracts | Cost of sales |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Derivatives instruments, pre-tax gains/(losses) recognized in earnings | $ 14 | $ 149

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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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