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Exploration and Evaluation Assets (Tables) | 12 Months Ended
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Dec. 31, 2021
Exploration For And Evaluation Of Mineral Resources [Abstract] |
Detailed information about exploration and evaluation assets |
| Exploration and Production | Oil Sands Mining and Upgrading | Total
| North America | North Sea | Offshore Africa |  |
Cost |  |  |  |  |
At December 31, 2019 | $ | 2,258 |  | $ | — |  | $ | 69 |  | $ | 252 |  | $ | 2,579 |
Additions/Acquisitions | 40 |  | — |  | 15 |  | — |  | 55 |
Transfers to property, plant and equipment | (194) |  | — |  | — |  | — |  | (194) |
Derecognitions and other | (3) |  | — |  | — |  | — |  | (3) |
Foreign exchange adjustments | — |  | — |  | (1) |  | — |  | (1) |
At December 31, 2020 | 2,101 |  | — |  | 83 |  | 252 |  | 2,436 |
Additions/Acquisitions | 30 |  | — |  | 8 |  | — |  | 38 |
Transfers to property, plant and equipment | (73) |  | — |  | — |  | (150) |  | (223) |
Derecognitions and other | (1) |  | — |  | — |  | — |  | (1) |
At December 31, 2021 | $ | 2,057 |  | $ | — |  | $ | 91 |  | $ | 102 |  | $ | 2,250 |

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