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Other Long-Term Liabilities - Asset Retirement Obligations (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Reconciliation Of Changes In Provision For Decommissioning Restoration And Rehabilitation Costs [Roll Forward] |  |  |
Balance – beginning of year | $ 7,690 | $ 6,908 | $ 6,806
Balance – end of year | 8,607 | 7,690 | 6,908
Total provision for decommissioning, restoration and rehabilitation costs | 8,607 | 7,690 | 6,908
Less: current portion | 787 | 634 | 495
Non-current asset retirement obligation | 7,820 | 7,056 | 6,413
Provision for decommissioning, restoration and rehabilitation costs |  |  |
Reconciliation Of Changes In Provision For Decommissioning Restoration And Rehabilitation Costs [Roll Forward] |  |  |
Liabilities incurred | 28 | 25 | 20
Liabilities acquired, net | 171 | 0 | 11
Liabilities settled | (646) | (509) | (449)
Asset retirement obligation accretion | 389 | 366 | 281
Revision of cost, inflation and timing estimates | 417 | 621 | 897
Impact of regulatory changes | 0 | 0 | 982
Change in discount rates | 419 | 314 | (1,698)
Foreign exchange adjustments | $ 139 | $ (35) | $ 58

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- Definition The increase in other provisions resulting from acquisitions through business combinations. [Refer: Total for all business combinations [member]; Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 84 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84&doctype=Standard -URIDate 2024-03-27 + Details
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