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Impairment of Exploration and Evaluation and Oil and Gas Properties - Summary of Carrying Amount of Goodwill Allocated to CGUs (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure of information for cash-generating units [line items] |  |
Goodwill | $ 4,614 |
WDS Australia Segment [Member] | WDS Pluto Scarborough [Member] |  |
Disclosure of information for cash-generating units [line items] |  |
Goodwill | 2,955 |
Excess of recoverable amount | 7,656 |
WDS Australia Segment [Member] | NWS Gas [Member] |  |
Disclosure of information for cash-generating units [line items] |  |
Goodwill | 394 |
Excess of recoverable amount | 1,399 |
WDS International Segment [Member] | WDS Shenzi [Member] |  |
Disclosure of information for cash-generating units [line items] |  |
Goodwill | 469 |
Excess of recoverable amount | 401 |
WDS International Segment [Member] | WDS Atlantis [Member] |  |
Disclosure of information for cash-generating units [line items] |  |
Goodwill | 513 |
Excess of recoverable amount | 189 |
WDS International Segment [Member] | Other [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Goodwill | 283 |
Excess of recoverable amount | $ 107 |

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- Definition The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2022-03-24 -Paragraph 134 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2022-en-r&anchor=para_134_a&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2022-03-24 -Paragraph 135 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2022-en-r&anchor=para_135_a&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2022-03-24 -Paragraph B67 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2022-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 54 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_c&doctype=Standard -URIDate 2022-03-24 + Details
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