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OTHER EXPENSE (INCOME) OTHER EXPENSE (INCOME) - Impairment reversal (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |
Impairment (reversals) charges | $ 2 | $ 23 | $ (87) | $ (313)
Non-current assets or disposal groups classified as held for sale [member] |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |
Impairment (reversals) charges | 2 | 11 | (87) | (325)
Intangible assets other than goodwill [member] |  |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |  |
Impairment (reversals) charges | $ 0 | $ 12 | $ 0 | $ 12

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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 2020-01-01 -Paragraph 82 -Subparagraph ba -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_82_ba&doctype=Standard -URIDate 2020-01-01 + Details
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