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Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2021
Property, plant and equipment [abstract] |
Detailed information about property, plant and equipment |
| Exploration and Production |  | Oil Sands Mining and Upgrading |  | Midstream and Refining |  | Head Office |  | Total
| North America |  | North Sea |  | Offshore Africa |  |  |  |  |  |  |  |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |
At December 31, 2019 | $ | 72,627 |  |  | $ | 7,296 |  |  | $ | 3,933 |  |  | $ | 45,016 |  |  | $ | 451 |  |  | $ | 466 |  |  | $ | 129,789 |
Additions/Acquisitions | 1,789 |  |  | 104 |  |  | 94 |  |  | 1,328 |  |  | 6 |  |  | 19 |  |  | 3,340 |
Transfers from E&E assets | 194 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 194 |
Derecognitions and other (1) | (521) |  |  | (3) |  |  | — |  |  | (634) |  |  | — |  |  | — |  |  | (1,158) |
Disposals | (92) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (92) |
Foreign exchange adjustments and other | — |  |  | (114) |  |  | (64) |  |  | — |  |  | — |  |  | — |  |  | (178) |
At December 31, 2020 | 73,997 |  |  | 7,283 |  |  | 3,963 |  |  | 45,710 |  |  | 457 |  |  | 485 |  |  | 131,895 |
Additions/Acquisitions | 4,146 |  |  | 208 |  |  | 48 |  |  | 1,526 |  |  | 9 |  |  | 23 |  |  | 5,960 |
Transfers from E&E assets | 73 |  |  | — |  |  | — |  |  | 150 |  |  | — |  |  | — |  |  | 223 |
Derecognitions and other (1) | (382) |  |  | 3 |  |  | — |  |  | (530) |  |  | — |  |  | — |  |  | (909) |
Foreign exchange adjustments and other | — |  |  | (56) |  |  | (31) |  |  | — |  |  | — |  |  | — |  |  | (87) |
At December 31, 2021 | $ | 77,834 |  |  | $ | 7,438 |  |  | $ | 3,980 |  |  | $ | 46,856 |  |  | $ | 466 |  |  | $ | 508 |  |  | $ | 137,082 |
Accumulated depletion and depreciation |  |  |  |  |  |  |  |  |  |
At December 31, 2019 | $ | 46,577 |  |  | $ | 5,712 |  |  | $ | 2,712 |  |  | $ | 6,247 |  |  | $ | 153 |  |  | $ | 345 |  |  | $ | 61,746 |
Expense | 3,676 |  |  | 247 |  |  | 161 |  |  | 1,668 |  |  | 15 |  |  | 25 |  |  | 5,792 |
Derecognitions and other (1) | (521) |  |  | (3) |  |  | — |  |  | (634) |  |  | — |  |  | — |  |  | (1,158) |
Disposals | (63) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (63) |
Foreign exchange adjustments and other | (28) |  |  | (103) |  |  | (51) |  |  | 8 |  |  | — |  |  | — |  |  | (174) |
At December 31, 2020 | 49,641 |  |  | 5,853 |  |  | 2,822 |  |  | 7,289 |  |  | 168 |  |  | 370 |  |  | 66,143 |
Expense | 3,468 |  |  | 149 |  |  | 118 |  |  | 1,733 |  |  | 15 |  |  | 25 |  |  | 5,508 |
Derecognitions and other (1) | (382) |  |  | 3 |  |  | — |  |  | (530) |  |  | — |  |  | — |  |  | (909) |
Foreign exchange adjustments and other | 5 |  |  | (54) |  |  | (17) |  |  | 7 |  |  | — |  |  | (1) |  |  | (60) |
At December 31, 2021 | $ | 52,732 |  |  | $ | 5,951 |  |  | $ | 2,923 |  |  | $ | 8,499 |  |  | $ | 183 |  |  | $ | 394 |  |  | $ | 70,682 |
Net book value |  |  |  |  |  |  |  |  |  |  |  |  |
- at December 31, 2021 | $ | 25,102 |  |  | $ | 1,487 |  |  | $ | 1,057 |  |  | $ | 38,357 |  |  | $ | 283 |  |  | $ | 114 |  |  | $ | 66,400 |
- at December 31, 2020 | $ | 24,356 |  |  | $ | 1,430 |  |  | $ | 1,141 |  |  | $ | 38,421 |  |  | $ | 289 |  |  | $ | 115 |  |  | $ | 65,752 |
(1) An asset is derecognized when no future economic benefits are expected to arise from its continued use or disposal.
Summary of net assets acquired and liabilities assumed | The following provides a summary of the net assets acquired relating to the acquisition:
Property, plant and equipment | $ | 1,114 |
Exploration and evaluation assets | 13 |
Working capital | 20 |
Long-term debt | (183) |
Asset retirement obligations | (18) |
Other long-term liabilities | (35) |
Deferred tax liability | (140) |
Net assets acquired | $ | 771 |
The following provides a summary of the net assets acquired relating to the acquisition:
Property, plant and equipment | $ | 750 |
Exploration and evaluation assets | 15 |
Other long-term assets | 204 |
Long-term debt | (397) |
Asset retirement obligations | (13) |
Other long-term liabilities | (442) |
Deferred tax asset | 211 |
Net assets acquired | 328 |
Less: cash consideration | 111 |
Gain on acquisition | $ | 217 |
The following provides a summary of the net assets acquired relating to the acquisition:
Property, plant and equipment |  |  | $ | 3,325 |  |  |  |
Exploration and evaluation assets |  |  | 91 |  |  |  |
Inventory, prepaids and other long-term assets |  |  | 195 |  |  |  |
Accrued liabilities |  |  | (21) |  |  |  |
Asset retirement obligations |  |  | (178) |  |  |  |
Net assets acquired |  |  | $ | 3,412 |  |  |  |

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