FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Market risk (Details) - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Increase of $0.10 | ||
| FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT | ||
| Other comprehensive income | $ 13.6 | |
| Decrease of $0.10 | ||
| FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT | ||
| Other comprehensive income | (13.6) | |
| Variance of $0.10 in the foreign currency exchange rate | ||
| FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT | ||
| Unhedged purchase of goods and services | 5.4 | |
| Unhedged acquisitions of tangible and intangible assets | $ 9.9 | |
| Interest rate risk | ||
| FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT | ||
| Long-term debt, fixed-rate debt (in percent) | 92.70% | 84.90% |
| Long-term debt, floating-rate debt (in percent) | 7.30% | 15.10% |
| 100 basis-point variance | ||
| FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT | ||
| Estimated sensitivity on interest payments | $ 4.9 | |