PER SHARE AMOUNTS - Additional Information (Details) - CAD ($) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Nov. 03, 2026 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Disclosure of non-adjusting events after reporting period [line items] | |||||
| Dividends paid (in CAD per share) | $ 0.64 | $ 0.58 | |||
| Common shares | |||||
| Disclosure of non-adjusting events after reporting period [line items] | |||||
| Instruments excluded from calculation, shares (in shares) | 22.9 | 25.1 | 23.1 | 24.6 | |
| Dividends paid on common shares | $ 1,191 | $ 1,047 | |||
| Common shares | Potential ordinary share transactions | |||||
| Disclosure of non-adjusting events after reporting period [line items] | |||||
| Dividends declared (in CAD per share) | $ 0.22 | ||||
| Preferred Shares | |||||
| Disclosure of non-adjusting events after reporting period [line items] | |||||
| Dividends paid on common shares | 2 | 12 | |||
| Dividends paid, other shares | $ 2 | $ 10 | |||