RESTRUCTURING, ACQUISITION AND OTHER (Details) - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Restructuring, Acquisition, And Other [Abstract] | ||
| Restructuring, acquisition and other excluding Shaw Transaction integration-related costs | $ 350 | $ 276 |
| Shaw Transaction integration-related costs | 89 | 130 |
| Restructuring, acquisition and other | $ 439 | $ 406 |