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Exploration And Evaluation - Summary of Exploration And Evaluation (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Disclosure of detailed information about exploration and evaluation [line items] |  |  |  |
Exploration commitments |  | $ 7,762 | $ 7,875 |
Exploration and evaluation assets [member] | Asia Pacific [Member] |  |  |  |
Disclosure of detailed information about exploration and evaluation [line items] |  |  |  |
Exploration commitments |  | 1 | 16 | [1]
Exploration and evaluation assets [member] | Asia Pacific [Member] | Carrying Amounts [member] |  |  |  |
Disclosure of detailed information about exploration and evaluation [line items] |  |  |  |
Carrying amount, Beginning balance | [1] | 546 | 1,981 |
Additions |  | 19 | 494 | [1]
Expensed | [1],[2] |  | (265) |
Transferred exploration and evaluation |  | (36) | (1,664) | [1]
Carrying amount, Ending balance |  | 529 | 546 | [1]
Exploration and evaluation assets [member] | Americas [Member] |  |  |  |
Disclosure of detailed information about exploration and evaluation [line items] |  |  |  |
Exploration commitments |  | 1 | 1 | [1]
Exploration and evaluation assets [member] | Americas [Member] | Carrying Amounts [member] |  |  |  |
Disclosure of detailed information about exploration and evaluation [line items] |  |  |  |
Acquisitions through business combination | [3] | 180 |  |
Additions |  | 204 |  |
Disposals |  | (10) |  |
Amortisation of licence acquisition costs |  | (8) |  |
Expensed | [2] | (126) |  |
Carrying amount, Ending balance |  | 240 |  |
Exploration and evaluation assets [member] | Africa [Member] |  |  |  |
Disclosure of detailed information about exploration and evaluation [line items] |  |  |  |
Exploration commitments |  | 27 | 77 | [1]
Exploration and evaluation assets [member] | Africa [Member] | Carrying Amounts [member] |  |  |  |
Disclosure of detailed information about exploration and evaluation [line items] |  |  |  |
Carrying amount, Beginning balance | [1] | 68 | 64 |
Additions |  | 17 | 7 | [1]
Amortisation of licence acquisition costs |  | (2) | (3) | [1]
Expensed | [2] | (45) |  |
Carrying amount, Ending balance |  | 38 | 68 | [1]
Exploration and evaluation assets [member] | Other [member] |  |  |  |
Disclosure of detailed information about exploration and evaluation [line items] |  |  |  |
Exploration commitments |  | 29 | 94 | [1]
Exploration and evaluation assets [member] | Other [member] | Carrying Amounts [member] |  |  |  |
Disclosure of detailed information about exploration and evaluation [line items] |  |  |  |
Carrying amount, Beginning balance | [1] | 614 | 2,045 |
Acquisitions through business combination | [3] | 180 |  |
Additions |  | 240 | 501 | [1]
Disposals |  | (10) |  |
Amortisation of licence acquisition costs |  | (10) | (3) | [1]
Expensed | [2] | (171) | (265) | [1]
Transferred exploration and evaluation |  | (36) | (1,664) | [1]
Carrying amount, Ending balance |  | $ 807 | $ 614 | [1]
[1] | Oceania and Asia have been presented within Asia Pacific for the year ended 31 December 2022. The 2021 amounts have been reclassified to be presented on the same basis.
[2] | $125 million (2021: $56 million) relates to costs of unsuccessful wells. For the year ended 31 December 2021, $209 million relates to capitalised costs written off due to the Group’s decision to withdraw its interests in Myanmar.
[3] | Acquisitions through business combination have been recognised on a provisional basis. Adjustments will be made to the provisional amounts if new information is obtained within 12 months from the acquisition date. Refer to Note B.5 for details.

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