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Financial Instruments - Economic Hedges (Details) - Derivatives Not Designated as Hedging Instruments - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivatives instruments, pre-tax gains/(losses) recognized in earnings | $ 94 | $ (7) | $ 294 | $ (251)
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 | 2 | (7) | 72 | (80)
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 | 14 | (10) | (2) | (9)
Currency exchange contracts | Forecasted transactions | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivatives instruments, pre-tax gains/(losses) recognized in earnings | (38) | (4) | 12 | 22
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 | (1) | 0 | 1 | (1)
Commodity contracts | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivatives instruments, pre-tax gains/(losses) recognized in earnings | $ 117 | $ 14 | $ 211 | $ (183)

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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=125515794&loc=SL5618551-113959 + Details
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