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FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure of carrying value and fair value of assets and liabilities |  |
Fair value gains (losses) on financial assets reclassified out of fair value through other comprehensive income recognized in fair value through profit and loss | $ (1,000,000) | $ 7,000,000
Cash included in cash and cash equivalents | 10,800,000,000 | 8,200,000,000
Short-term deposits, classified as cash equivalents | 1,900,000,000 | 1,800,000,000
Financial assets transferred between Levels 1, 2, and 3 |  | 0
Cash flow hedges |  |
Disclosure of carrying value and fair value of assets and liabilities |  |
Gains (losses) on cash flow hedges, before tax | 582,000,000 | (479,000,000)
Net investment hedges |  |
Disclosure of carrying value and fair value of assets and liabilities |  |
Gains (losses) on hedges of net investments in foreign operations, before tax | 407,000,000 | 182,000,000
Unrealized Available-for-Sale Gain |  |
Disclosure of carrying value and fair value of assets and liabilities |  |
Gains (losses) recognised in other comprehensive income including exchange differences, fair value measurement, assets | 996,000,000 | 916,000,000
Unrealized Available-for-Sale Loss |  |
Disclosure of carrying value and fair value of assets and liabilities |  |
Gains (losses) recognised in other comprehensive income including exchange differences, fair value measurement, assets | (213,000,000) | (322,000,000)
Assets held to hedge liabilities arising from financing activities [member] | Cash flow hedges |  |
Disclosure of carrying value and fair value of assets and liabilities |  |
Derivative financial assets held for hedging | 232,000,000 | 689,000,000
Elected for hedge accounting | Net investment hedges |  |
Disclosure of carrying value and fair value of assets and liabilities |  |
Derivative financial assets held for hedging | $ 163,000,000 | $ 868,000,000

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- Definition The amount of cash on hand and demand deposits. [Refer: Cash on hand] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 + Details
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