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Business Combination - Summary of Purchase Consideration and the Provisional Fair Value of Goodwill, Identifiable Assets and Liabilities of BHPP Acquired (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about business combination [line items] |  |  |
Provisional locked box payment received | $ 683 |  |
Dividends paid | (3,160) | $ (471) | $ (811)
BHP Petroleum International Pty Ltd [member] |  |  |
Disclosure of detailed information about business combination [line items] |  |  |
Provisional locked box payment received | 1,513 |  |
Dividends paid | $ 830 |  |

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- Definition The amount of dividends recognised as distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 107 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_107&doctype=Standard -URIDate 2022-03-24 + Details
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