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EXPLORATION AND EVALUATION ASSETS (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Exploration and Evaluation Assets |  |
Amortization | $ (2) | $ (3)
Exploration and Evaluation Assets. |  |
Exploration and Evaluation Assets |  |
Beginning of year | 2,428 | 2,319
Acquisitions and additions | 176 | 193
Transfers to oil and gas assets | (170) |
Dry hole expenses | (80) | (66)
Disposals and derecognition | (70) | (16)
Foreign exchange adjustments | 2 | (2)
End of year | $ 2,286 | $ 2,428

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