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Supplementary Cash Flow Information - Non-Cash Working Capital (Details) - CAD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Disclosure Of Supplementary Cash Flow Information [Line Items] |  |  |  |  |
Current assets | $ 10,176 |  | $ 10,176 |  | $ 9,708
Current Liabilities | 6,383 |  | 6,383 |  | 6,210
Working Capital | 3,793 |  | 3,793 |  | $ 3,498
Accounts Receivable and Accrued Revenues | 904 | $ (1,288) | 326 | $ (1,097) |
Income Tax Receivable | 14 | 157 | 191 | (12) |
Inventories | 480 | (505) | 99 | (343) |
Accounts Payable and Accrued Liabilities | (896) | 851 | 60 | 69 |
Income Tax Payable | 105 | 107 | 96 | (1,056) |
Total Change in Non-Cash Working Capital | 607 | (678) | 772 | (2,439) |
Net Change in Non-Cash Working Capital – Operating Activities | 588 | (641) | 813 | (2,142) |
Net Change in Non-Cash Working Capital – Investing Activities | $ 19 | $ (37) | $ (41) | $ (297) |

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