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Provisions - Summary of Provisions by Class (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of other provisions [line items] |  |
Beginning balance | $ 763 | $ 911
Effect of movements in foreign exchange | (25) | (56)
Provisions made | 203 | 264
Provisions used | (213) | (225)
Provisions reversed | (48) | (32)
Other movements | (75) | (99)
Ending balance | 605 | 763
Restructuring [Member] |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 104 | 103
Effect of movements in foreign exchange | (2) | 8
Provisions made | 63 | 55
Provisions used | (73) | (54)
Provisions reversed | (13) | (7)
Other movements | 1 | (1)
Ending balance | 80 | 104
Disputes [Member] |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 489 | 436
Effect of movements in foreign exchange | (20) | (40)
Provisions made | 132 | 102
Provisions used | (129) | (80)
Provisions reversed | (35) | (24)
Other movements | (18) | 95
Ending balance | 420 | 489
Other - Disputes [Member] |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 170 | 372
Effect of movements in foreign exchange | (4) | (24)
Provisions made | 9 | 107
Provisions used | (11) | (91)
Provisions reversed | (1) | (1)
Other movements | (58) | (193)
Ending balance | $ 106 | $ 170

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- Definition The increase (decrease) in other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_84&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_84&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount recognised for new other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_84_b&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_84_c&doctype=Standard -URIDate 2021-03-24 + Details
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