LEASES - Narrative (Details) - CAD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Lessee, Lease, Description [Line Items] | ||
| Variable lease payments | $ 29 | $ 20 |
| Assets sold, that will potentially be leased in the future, lease term | 3 years | |
| Estimated purchase price of assets sold | $ 400 | |
| Construction in process | ||
| Lessee, Lease, Description [Line Items] | ||
| Carrying value of assets sold | $ 144 | $ 50 |
| Minimum | ||
| Lessee, Lease, Description [Line Items] | ||
| Non-cancellable contract periods for leases, typical range | 3 years | |
| Maximum | ||
| Lessee, Lease, Description [Line Items] | ||
| Non-cancellable contract periods for leases, typical range | 20 years | |