Debt due within one year - Details of Securitized Trade Receivables (Details) - CAD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Financial Instruments [Abstract] | ||
| Average interest rate throughout the year | 3.78% | 5.50% |
| Securitized receivables | $ 3,470 | $ 3,405 |
| Maximum amount available under our securitization program | $ 2,300 | $ 2,300 |