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Provisions - Summary of Provisions (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure of detailed information about provisions [line items] |  |  |
Beginning Balance |  | $ 2,824 | $ 2,907
Acquisitions through business combination |  | 4,804 |
Change in provision |  | (559) | (112)
Unwinding of present value discount |  | 110 | 29
Ending Balance |  | 7,179 | 2,824
Current |  | 1,219 | 605
Non-current |  | 5,960 | 2,219
Net carrying amount |  | 7,179 | 2,824
Restoration [member] |  |  |
Disclosure of detailed information about provisions [line items] |  |  |
Beginning Balance | [1] | 2,218 | 2,134
Acquisitions through business combination | [1] | 4,310 |
Change in provision | [1] | (382) | 60
Unwinding of present value discount | [1] | 107 | 24
Ending Balance | [1] | 6,253 | 2,218
Current | [1] | 575 | 235
Non-current | [1] | 5,678 | 1,983
Net carrying amount | [1] | 6,253 | 2,218
Employee benefits [member] |  |  |
Disclosure of detailed information about provisions [line items] |  |  |
Beginning Balance |  | 286 | 295
Acquisitions through business combination |  | 329 |
Change in provision |  | (98) | (9)
Unwinding of present value discount |  | 0 |
Ending Balance |  | 517 | 286
Current |  | 331 | 269
Non-current |  | 186 | 17
Net carrying amount |  | 517 | 286
Onerous contracts [member] |  |  |
Disclosure of detailed information about provisions [line items] |  |  |
Beginning Balance | [2] | 214 | 349
Acquisitions through business combination | [2] | 0 |
Change in provision | [2] | (216) | (140)
Unwinding of present value discount | [2] | 2 | 5
Ending Balance | [2] | 0 | 214
Current | [2] | 0 |
Non-current | [2] | 0 | 214
Net carrying amount | [2] | 0 | 214
Other [member] |  |  |
Disclosure of detailed information about provisions [line items] |  |  |
Beginning Balance |  | 106 | 129
Acquisitions through business combination |  | 165 |
Change in provision |  | 137 | (23)
Unwinding of present value discount |  | 1 |
Ending Balance |  | 409 | 106
Current |  | 313 | 101
Non-current |  | 96 | 5
Net carrying amount |  | $ 409 | $ 106
[1] | 2022 change in provision is due to a revision of discount rates of $978 million (primarily due to an increase in risk free rates) and provisions used of $262 million, offset by changes in estimates of $858 million. Changes in estimates are due to new activities, increase in scope of removal and cost and rate escalations supported by the most recent estimates and benchmarks.
[2] | 2022 change in provision is due to changes in estimates of $245 million offset by provisions used of $29 million.

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- Definition The increase in other provisions resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2022-03-24 -Paragraph 84 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2022-en-r&anchor=para_84&doctype=Standard -URIDate 2022-03-24 + Details
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Balance Type: | credit
Period Type: | duration

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- Definition The amount of current provisions, including provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 54 -Subparagraph l -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_l&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of non-current provisions, including provisions for employee benefits. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 54 -Subparagraph l -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_l&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of liabilities of uncertain timing or amount, including provisions for employee benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 54 -Subparagraph l -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_l&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Disclosure of detailed information about provisions. + References No definition available. + Details
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- Definition Unwinding of present value discount provision. + References No definition available. + Details
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- Details
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- Details
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- Details
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