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Income Taxes - Deferred Income Tax Balances (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | $ 560 | $ (990) |
Deferred Income Tax Liability (Asset) | 7,916 | 8,364 | $ 9,081
Property, plant and equipment |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | (423) | (729) |
Deferred Income Tax Liability (Asset) | 10,996 | 11,093 |
Decommissioning and restoration provision |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | (25) | (10) |
Deferred Income Tax Liability (Asset) | (2,644) | (2,292) |
Employee retirement benefit plans |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | (23) | (92) |
Deferred Income Tax Liability (Asset) | (278) | (297) |
Tax loss carry-forwards |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | 867 | (14) |
Deferred Income Tax Liability (Asset) | (11) | (29) |
Other |  |  |
Income Taxes |  |  |
Recognized in deferred income tax (recovery) / expense | 164 | (145) |
Deferred Income Tax Liability (Asset) | $ (147) | $ (111) |

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