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, 2024
CAD ($)
shares
|
Apr. 30, 2023
CAD ($)
shares
|
Apr. 30, 2024
CAD ($)
shares
$ / shares
|
Apr. 30, 2023
CAD ($)
shares
$ / shares
|
|
| Disclosure of sensitivity analysis for actuarial assumptions [line items] | ||||
| Compensation Expense | $ | $ 10.4 | $ 9.6 | $ 20.5 | $ 22.2 |
| Granted | shares | 2.5 | 2.5 | ||
| Weighted average fair value of options granted | $ / shares | $ 14.36 | $ 14.70 | ||