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Income Taxes - Deferred Income Tax Balances (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | $ (990) | $ 56 |
Deferred Income Tax Liability (Asset) | 8,364 | 9,081 | $ 8,758
Property, plant and equipment |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | (729) | (260) |
Deferred Income Tax Liability (Asset) | 11,093 | 11,477 |
Decommissioning and restoration provision |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | (10) | 141 |
Deferred Income Tax Liability (Asset) | (2,292) | (1,936) |
Employee retirement benefit plans |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | (92) | (142) |
Deferred Income Tax Liability (Asset) | (297) | (470) |
Tax loss carry-forwards |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | (14) | 161 |
Deferred Income Tax Liability (Asset) | (29) | (15) |
Other |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | (145) | 156 |
Deferred Income Tax Liability (Asset) | $ (111) | $ 25 |

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