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v3.20.4

GOODWILL AND OTHER INTANGIBLE ASSETS (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 CAD ($) | Dec. 31, 2020 CAD ($) $ / bbl | Dec. 31, 2019 CAD ($)
Changes in intangible assets other than goodwill [abstract] |  |  |
Balance at beginning of period | $ 3,058 | $ 3,058 | $ 3,061
Amortization |  | (2) | (3)
Additions |  | 272 |
Balance at end of period |  | $ 3,328 | $ 3,058
After tax discount rate applied to cash flow projections |  | 7.50% | 7.50%
2021 |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Projected West Texas Intermediate prices | $ / bbl |  | 45.00 |
2022 |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Projected West Texas Intermediate prices | $ / bbl |  | 56.00 |
2023 |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Projected West Texas Intermediate prices | $ / bbl |  | 60.20 |
2024 |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Projected West Texas Intermediate prices | $ / bbl |  | 63.45 |
Thereafter |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Average growth rate after 2024 |  | 2.00% |
Minimum |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Cash flow forecast period |  | P18Y |
Maximum |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Cash flow forecast period |  | P44Y |
Oil Sands | Fort Hills CGU |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
After tax discount rate applied to cash flow projections | 7.50% | 7.50% | 7.50%
Taxes Effect Of Impairment Of Asset | $ 440 |  | $ 910
Oil Sands | Goodwill |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Balance at beginning of period | 2,752 | $ 2,752 | 2,752
Balance at end of period |  | 2,752 | 2,752
Refining and Marketing | Goodwill |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Balance at beginning of period | 140 | 140 | 140
Balance at end of period |  | 140 | 140
Refining and Marketing | Brand Name |  |  |
Changes in intangible assets other than goodwill [abstract] |  |  |
Balance at beginning of period | $ 166 | 166 | 169
Amortization |  | (2) | (3)
Additions |  | 272 |
Balance at end of period |  | $ 436 | $ 166

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