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Debt and Capital Structure - Summary of Net Debt to Adjusted EBITDA (Detail) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of objectives, policies and processes for managing capital [line items] |  |  |  |
Short-Term Borrowings |  | $ 173 | $ 179 |
Long-Term Debt |  | 192 | 0 |
Long-Term Portion of Long-Term Debt |  | 7,342 | 7,108 |
Total Debt |  | 7,500 | 7,100 |
Less: Cash and Cash Equivalents |  | (3,093) | (2,227) | $ (4,524)
Net Debt |  | 4,614 | 5,060 |
Net Earnings (Loss) |  | 3,142 | 4,109 |
Add (Deduct): |  |  |  |
Foreign Exchange (Gain) Loss, Net |  | 462 | (67) |
(Gain) Loss on Divestiture of Assets | [1] | (119) | 20 |
Re-measurement of Contingent Payments |  | (30) | (59) |
Other (Income) Loss, Net |  | $ (55) | $ (63) |
Net Debt to Adjusted EBITDA |  | 50.00% | 50.00% |
Rolling Twelve Month Basis |  |  |  |
Disclosure of objectives, policies and processes for managing capital [line items] |  |  |  |
Short-Term Borrowings |  | $ 173 | $ 179 |
Long-Term Portion of Long-Term Debt |  | 7,342 | 7,108 |
Total Debt |  | 7,707 | 7,287 |
Less: Cash and Cash Equivalents |  | (3,093) | (2,227) |
Net Debt |  | 4,614 | 5,060 |
Net Earnings (Loss) |  | 3,142 | 4,109 |
Add (Deduct): |  |  |  |
Finance Costs, Net |  | 514 | 538 |
Income Tax Expense (Recovery) |  | 929 | 931 |
Depreciation, Depletion and Amortization |  | 4,871 | 4,644 |
Exploration and Evaluation Asset Write-downs |  | 37 | 29 |
(Income) Loss From Equity-Accounted Affiliates |  | (66) | (51) |
Unrealized (Gain) Loss on Risk Management |  | 12 | 52 |
Foreign Exchange (Gain) Loss, Net |  | 462 | (67) |
(Gain) Loss on Divestiture of Assets |  | (119) | 20 |
Re-measurement of Contingent Payments |  | 30 | 59 |
Other (Income) Loss, Net |  | (55) | (63) |
Adjusted EBITDA |  | $ 9,757 | $ 10,201 |
[1] | (1)Revised presentation as of January 1, 2024. See Note 4.

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