Share-Based Compensation (Narrative) (Details) - Stock Option Awards [Member] $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Apr. 30, 2026
CAD ($)
|
Apr. 30, 2025
CAD ($)
|
Apr. 30, 2026
CAD ($)
shares
$ / shares
|
Apr. 30, 2025
CAD ($)
shares
$ / shares
|
|
| Disclosure of sensitivity analysis for actuarial assumptions [line items] | ||||
| Compensation Expense | $ | $ 9.0 | $ 7.0 | $ 18.3 | $ 10.1 |
| Granted | 1.6 | 2.0 | ||
| Weighted average fair value of options granted | $ / shares | $ 21.89 | $ 12.80 | ||