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Asset Retirement Obligations - Additional Information (Details) - Asset retirement obligation - CAD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of other provisions [line items] |  |  |
Estimated cash flows, undiscounted amount | $ 724,800 | $ 721,700 |
Estimated inflation rate | 2.10% | 1.80% |
Estimated risk free rate | 3.30% | 1.70% |
Other provisions | $ 588,923 | $ 743,683 | $ 760,383
Other provisions, period of costs being incurred | 60 years |  |

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