FINANCIAL INSTRUMENTS - Reconciliation of Changes in the Fair Value of Available for Sale Financial Assets (Detail) - Level 3 of fair value hierarchy $ in Millions |
9 Months Ended |
|---|---|
|
Sep. 30, 2026
CAD ($)
| |
| Disclosure of fair value measurement of assets [Line Items] | |
| Fair value, beginning of year | $ 193 |
| Acquisitions | 5 |
| Changes in Fair Value | 3 |
| Fair value, end of year | $ 201 |