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IMPAIRMENT REVERSALS (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Disclosure of impairment loss and reversal of impairment loss [line items] |  |
Impairment (reversals) charges | $ (269) | $ (1,423)
Impairment (reversals) of long lived assets |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |
Impairment (reversals) charges | (281) | (1,423)
Intangible assets other than goodwill [member] |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |
Impairment (reversals) charges | $ 12 | $ 0

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of impairment loss, impairment gain or reversal of impairment loss that is recognised in profit or loss in accordance with paragraph 5.5.8 of IFRS 9 and that arises from applying the impairment requirements in Section 5.5 of IFRS 9. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 82 -Subparagraph ba -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_82_ba&doctype=Standard -URIDate 2019-03-27 + Details
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