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Segment Production And Growth Assets - Summary of Segment Production and Growth Assets (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties | [1] | $ 39,919 |  | $ 18,649 |
Australia [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total exploration and evaluation |  | 529 |  | 546 | [2]
Total oil and gas properties |  | 25,155 |  | 16,226 | [2]
Total lease assets |  | 307 |  | 209 | [2]
Additions to exploration and evaluation |  | 19 | [3] | 458 | [2]
Additions to oil and gas properties |  | 2,021 | [3] | 1,135 | [2]
Additions to lease assets | [3] | 143 |  |  |
Australia [member] | Land and buildings [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 802 |  | 738 | [2]
Total lease assets |  | 93 |  | 76 | [2]
Additions to lease assets | [3] | 4 |  |  |
Australia [member] | Transferred exploration and evaluation [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 481 |  | 526 | [2]
Australia [member] | Plant and equipment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 18,249 |  | 12,316 | [2]
Total lease assets |  | 214 |  | 133 | [2]
Additions to lease assets | [3] | 139 |  |  |
Australia [member] | Projects in development [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 5,623 | [4] | 2,646 | [2]
Australia [member] | Exploration [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to exploration and evaluation |  | 1 | [3] | 1 | [2]
Australia [member] | Evaluation [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to exploration and evaluation |  | 19 | [3] | 451 | [2]
Australia [member] | Restoration [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to exploration and evaluation |  | (1) | [3],[5] | 6 | [2]
Additions to oil and gas properties |  | (346) | [3] | 18 | [2]
Australia [member] | Oil And Gas Properties [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to oil and gas properties |  | 2,252 | [3] | 1,071 | [2]
Australia [member] | Capitalised borrowings costs [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to oil and gas properties |  | 115 | [3],[6] | 46 | [2],[7]
Australia [member] | Asia Pacific [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total exploration and evaluation |  | 529 |  | 546 | [2]
International [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total exploration and evaluation |  | 278 |  | 68 | [2]
Total oil and gas properties |  | 14,479 |  | 2,198 | [2]
Total lease assets |  | 238 |  | 187 | [2]
Additions to exploration and evaluation |  | 221 | [3] | 43 | [2]
Additions to oil and gas properties |  | 1,711 | [3] | 1,142 | [2]
Additions to lease assets |  | 90 | [3] | 228 | [2]
International [member] | Land and buildings [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 37 |  |  |
Total lease assets |  | 107 |  | 11 | [2]
Additions to lease assets | [2] |  |  | 14 |
International [member] | Plant and equipment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 4,647 |  | 3 | [2]
Total lease assets |  | 131 |  | 176 | [2]
Additions to lease assets |  | 90 | [3] | 214 | [2]
International [member] | Projects in development [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 9,795 | [4] | 2,195 | [2]
International [member] | Exploration [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to exploration and evaluation |  | 121 | [3] | 41 | [2]
International [member] | Evaluation [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to exploration and evaluation |  | 100 | [3] | 2 | [2]
International [member] | Restoration [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to oil and gas properties |  | (28) | [3] | 14 | [2]
International [member] | Oil And Gas Properties [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to oil and gas properties |  | 1,560 | [3] | 1,051 | [2]
International [member] | Capitalised borrowings costs [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to oil and gas properties |  | 179 | [3],[6] | 77 | [2],[7]
International [member] | Americas [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total exploration and evaluation |  | 240 |  |  |
International [member] | Africa [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total exploration and evaluation |  | 38 |  | 68 | [2]
Marketing [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total lease assets | [2] |  |  | 1 |
Marketing [member] | Land and buildings [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total lease assets | [2] |  |  | 1 |
Corporate/Other [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 285 |  | 225 | [2]
Total lease assets |  | 719 |  | 683 | [2]
Additions to oil and gas properties |  | 92 | [3] | 57 | [2]
Additions to lease assets | [3] | 9 |  |  |
Corporate/Other [member] | Land and buildings [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 1 |  | 1 | [2]
Total lease assets |  | 264 |  | 289 | [2]
Corporate/Other [member] | Plant and equipment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 161 |  | 146 | [2]
Total lease assets |  | 455 |  | 394 | [2]
Additions to lease assets | [3] | 9 |  |  |
Corporate/Other [member] | Projects in development [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 123 | [4] | 78 | [2]
Corporate/Other [member] | Oil And Gas Properties [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to oil and gas properties |  | 92 | [3] | 57 | [2]
Consolidated [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total exploration and evaluation |  | 807 |  | 614 |
Total oil and gas properties |  | 39,919 |  | 18,649 |
Total lease assets |  | 1,264 |  | 1,080 |
Additions to exploration and evaluation |  | 240 | [3] | 501 |
Additions to oil and gas properties |  | 3,824 | [3] | 2,334 |
Additions to lease assets |  | 242 | [3] | 228 |
Consolidated [member] | Land and buildings [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 840 |  | 739 |
Total lease assets |  | 464 |  | 377 |
Additions to lease assets |  | 4 | [3] | 14 |
Consolidated [member] | Transferred exploration and evaluation [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 481 |  | 526 |
Consolidated [member] | Plant and equipment [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 23,057 |  | 12,465 |
Total lease assets |  | 800 |  | 703 |
Additions to lease assets |  | 238 | [3] | 214 |
Consolidated [member] | Projects in development [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total oil and gas properties |  | 15,541 | [4] | 4,919 |
Consolidated [member] | Exploration [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to exploration and evaluation |  | 122 | [3] | 42 |
Consolidated [member] | Evaluation [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to exploration and evaluation |  | 119 | [3] | 453 |
Consolidated [member] | Restoration [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to exploration and evaluation |  | (1) | [3],[5] | 6 |
Additions to oil and gas properties |  | (374) | [3] | 32 |
Consolidated [member] | Oil And Gas Properties [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to oil and gas properties |  | 3,904 | [3] | 2,179 |
Consolidated [member] | Capitalised borrowings costs [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Additions to oil and gas properties |  | 294 | [3],[6] | 123 | [7]
Consolidated [member] | Asia Pacific [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total exploration and evaluation |  | 529 |  | 546 |
Consolidated [member] | Americas [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total exploration and evaluation |  | 240 |  |  |
Consolidated [member] | Africa [member] |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Total exploration and evaluation |  | $ 38 |  | $ 68 |
[1] | Oil and gas properties includes other plant and equipment which is no longer separately presented in the consolidated statement of financial position. The 2021 amounts have been reclassified to be presented on the same basis.
[2] | The 2021 amounts have been restated to reflect the changes in operating segments. Refer to ‘Operating segment information’ in Note A.1 for details. In addition, oil and gas properties includes other plant and equipment which is no longer separately presented in the consolidated statement of financial position. The 2021 amounts have been reclassified to be presented on the same basis.
[3] | Additions exclude acquisitions through business combinations.
[4] | Projects in development include the fair value ascribed to future phases of certain projects acquired through business combinations.
[5] | Relates to changes in restoration provision assumptions.
[6] | Borrowing costs capitalised were at a weighted average interest rate of 3.8%.
[7] | Borrowing costs capitalised were at a weighted average interest rate of 3.6%.

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