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FINANCIAL INSTRUMENTS - Other Comprehensive Income (Loss) (Details) - Net Investment Hedging - Other comprehensive income (loss) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Foreign currency |  |
Derivative Instruments, Gain (Loss) |  |
Gains and (losses) on derivative instruments | $ 0 | $ 1
Cross-currency swaps |  |
Derivative Instruments, Gain (Loss) |  |
Gains and (losses) on derivative instruments | 44 | 35
Foreign currency-denominated debt |  |
Derivative Instruments, Gain (Loss) |  |
Gains and (losses) on derivative instruments | $ 25 | $ 8

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- Definition Amount, before tax and reclassification, of gain (loss) from derivative designated and qualifying as net investment hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CCC -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL109998896-113959 + Details
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