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Oil and Gas Properties (Tables) | 12 Months Ended
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Dec. 31, 2022
Text Block [abstract] |
Summary of detailed information about oil and gas properties |
|  |  | Land and buildings |  |  |  | Transferred exploration and evaluation |  |  |  | Plant and equipment |  |  |  | Projects in development |  |  |  | Total |
|  |  | US$m |  |  |  | US$m |  |  |  | US$m |  |  |  | US$m |  |  |  | US$m |
Year ended 31 December 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying amount at 1 January 2022 |  |  | 739 |  |  |  | 526 |  |  |  | 12,465 |  |  |  | 4,919 |  |  |  | 18,649 |
Acquisitions through business combinations 1 |  |  | 64 |  |  |  | - |  |  |  | 11,952 |  |  |  | 7,337 |  |  |  | 19,353 |
Additions 2 |  |  | - |  |  |  | - |  |  |  | (508) |  |  |  | 4,332 |  |  |  | 3,824 |
Disposals at written down value |  |  | (3) |  |  |  | (10) |  |  |  | (32) |  |  |  | - |  |  |  | (45) |
Depreciation and amortisation |  |  | (54) |  |  |  | (107) |  |  |  | (2,637) |  |  |  | - |  |  |  | (2,798) |
Impairment reversal 3 |  |  | 87 |  |  |  | 30 |  |  |  | 783 |  |  |  | - |  |  |  | 900 |
Completions and transfers |  |  | 7 |  |  |  | 42 |  |  |  | 1,034 |  |  |  | (1,047) |  |  |  | 36 |
Carrying amount at 31 December 2022 |  |  | 840 |  |  |  | 481 |  |  |  | 23,057 |  |  |  | 15,541 |  |  |  | 39,919 |
At 31 December 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Historical cost |  |  | 1,765 |  |  |  | 1,538 |  |  |  | 45,273 |  |  |  | 15,937 |  |  |  | 64,513 |
Accumulated depreciation and impairment |  |  | (925) |  |  |  | (1,057) |  |  |  | (22,216) |  |  |  | (396) |  |  |  | (24,594 ) |
Net carrying amount |  |  | 840 |  |  |  | 481 |  |  |  | 23,057 |  |  |  | 15,541 |  |  |  | 39,919 |
Year ended 31 December 2021 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying amount at 1 January 2021 |  |  | 749 |  |  |  | 431 |  |  |  | 12,091 |  |  |  | 2,195 |  |  |  | 15,466 |
Additions |  |  | - |  |  |  | - |  |  |  | 13 |  |  |  | 2,321 |  |  |  | 2,334 |
Disposals at written down value |  |  | (2) |  |  |  | - |  |  |  | (6) |  |  |  | (22) |  |  |  | (30) |
Depreciation and amortisation |  |  | (51) |  |  |  | (79) |  |  |  | (1,449) |  |  |  | - |  |  |  | (1,579) |
Impairment losses 3 |  |  | (10) |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (10) |
Impairment reversal 3 |  |  | 44 |  |  |  | 66 |  |  |  | 911 |  |  |  | 37 |  |  |  | 1,058 |
Completions and transfers |  |  | 11 |  |  |  | 108 |  |  |  | 905 |  |  |  | 640 |  |  |  | 1,664 |
Transfer to assets held for sale 5 |  |  | (2) |  |  |  | - |  |  |  | - |  |  |  | (252) |  |  |  | (254) |
Carrying amount at 31 December 2021 |  |  | 739 |  |  |  | 526 |  |  |  | 12,465 |  |  |  | 4,919 |  |  |  | 18,649 |
At 31 December 2021 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Historical cost |  |  | 1,701 |  |  |  | 1,495 |  |  |  | 32,796 |  |  |  | 5,321 |  |  |  | 41,313 |
Accumulated depreciation and impairment |  |  | (962) |  |  |  | (969) |  |  |  | (20,331) |  |  |  | (402) |  |  |  | (22,664) |
Net carrying amount |  |  | 739 |  |  |  | 526 |  |  |  | 12,465 |  |  |  | 4,919 |  |  |  | 18,649 |
1. | 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. Projects in development include the fair value ascribed to future phases of certain projects acquired through business combinations.
2. | Includes $3,904 million of capital additions and $294 million of capitalised borrowing costs offset by $374 million following changes in restoration provision assumptions.
3. | Refer to Note B.4 for details on impairment losses and impairment reversals.
4. | 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.
5. | Refer to Note B.7 for details on assets held for sale.

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