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Assets Classified as Held for Sale, Liabilities Associated With Assets Held for Sale and Discontinued Operations - Additional Information (Detail) $ in Millions, $ in Billions |  | 12 Months Ended
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Jun. 01, 2020 USD ($) | Jun. 01, 2020 AUD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | [1]
Disclosure of Assets Classified as Held for Sale and Discontinued Operations [line items] |  |  |  |  |
Sale of Subsidiary company |  |  | $ 7 |  | $ 133
Disposal of net Asset |  |  | 11 | $ 210 |
Derecognisition of net asset |  |  | (33) | (9,665) |
Effect of movements in foreign exchange |  |  | $ (2) | $ (484) |
Gain on disposal of asset | $ 1,919 |  |  |  |
Australia [member] |  |  |  |  |
Disclosure of Assets Classified as Held for Sale and Discontinued Operations [line items] |  |  |  |  |
Disposal of net Asset | 10,800 |  |  |  |
Derecognisition of net asset | (8,500) |  |  |  |
Effect of movements in foreign exchange | (400) |  |  |  |
Gain on disposal of asset | $ 1,900 |  |  |  |
Asahi [Member] |  |  |  |  |
Disclosure of Assets Classified as Held for Sale and Discontinued Operations [line items] |  |  |  |  |
Sale of Subsidiary company |  | $ 16.0 |  |  |
[1] | The consolidated statement of cash flows for 2019 has been restated to include operating, investing and financing activities from discontinued operations separately in the cashflow statement. In addition, the 2019 cash flow from investing activities has been restated to reflect reclassification of the cash flow hedges in relation to the Australia divestiture reported in the financing activities in 2019 and recycled to profit or loss upon the completion of the transaction.

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- Definition Disclosure of assets classified as held for sale and discontinued operations line items. + References No definition available. + Details
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- Definition The aggregate cash flows arising from losing control of subsidiaries or other businesses, classified as investing activities. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 39 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_39&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The gain (loss) recognised on the measurement to fair value less costs to sell or on the disposal of the assets or disposal group(s) constituting the discontinued operation. [Refer: Discontinued operations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 5 -IssueDate 2021-01-01 -Paragraph 33 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2021-en-r&anchor=para_33_b_iii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in equity resulting from the disposal of subsidiaries. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_106_d&doctype=Standard -URIDate 2021-03-24 + Details
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