Equity - Additional Information (Details) - CAD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 8 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|---|
Jul. 31, 2026 |
Apr. 30, 2026 |
Jul. 31, 2026 |
Aug. 25, 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 | ||||
| Common Shares for Cancellation | |||||
| Disclosure of classes of share capital [line items] | |||||
| Number of shares repurchase under normal course issuer bid (in shares) | 25,000,000 | ||||
| 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) | 3,800,000 | 21,600,000 | 15,800,000 | ||
| Share repurchase program price per share (in canadian dollars per share) | $ 239.37 | $ 198.60 | |||
| Share repurchase program authorized amount | $ 922 | $ 3,193 |