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PROPERTY, PLANT AND EQUIPMENT - Segment breakup - (Details) - CAD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | $ 65,546 | $ 68,130 |
Assets under construction and not subject to depreciation | 4,600 | 5,000 |
Oil Sands |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | 49,878 | 51,940 |
Exploration and Production |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | 5,496 | 6,216 |
Refining and Marketing |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | 9,393 | 9,210 |
Corporate and Eliminations |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | 779 | 764 |
Cost |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | 126,559 | 127,658 | $ 125,164
Cost | Oil Sands |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | 87,849 | 86,999 |
Cost | Exploration and Production |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | 21,495 | 23,640 |
Cost | Refining and Marketing |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | 15,989 | 15,757 |
Cost | Corporate and Eliminations |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | 1,226 | 1,262 |
Accumulated provision |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | (61,013) | (59,528) | $ (52,524)
Accumulated provision | Oil Sands |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | (37,971) | (35,059) |
Accumulated provision | Exploration and Production |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | (15,999) | (17,424) |
Accumulated provision | Refining and Marketing |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | (6,596) | (6,547) |
Accumulated provision | Corporate and Eliminations |  |  |
PROPERTY PLANT AND EQUIPMENT |  |  |
Property, plant and equipment | $ (447) | $ (498) |

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