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IMPAIRMENT REVERSALS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment (reversals) charges	$ 900	$ (212)
Impairment (reversals) of long lived assets
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment (reversals) charges	722	(224)
Impairment of intangibles
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment (reversals) charges	24	12
Goodwill
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment (reversals) charges	$ 154	$ 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.

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No definition available.

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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
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