Equity - Additional Information (Details) - CAD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 6 Months Ended | 8 Months Ended | |
|---|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2026 |
Apr. 30, 2026 |
Sep. 05, 2025 |
|
| Disclosure of classes of share capital [line items] | ||||
| Number of shares repurchase under normal course issuer bid (in shares) | 30,000,000 | |||
| Dividends per common share | Normal Course Issuer Bid | ||||
| Disclosure of classes of share capital [line items] | ||||
| Share repurchase program number of shares repurchased (in shares) | 6,000,000.0 | 12,000,000.0 | 17,800,000 | |
| Share repurchase program price per share (in canadian dollars per share) | $ 193.47 | $ 185.76 | ||
| Share repurchase program authorized amount | $ 1,184 | $ 2,272 |