Share-based payments - Disclosure of information concerning PSUs (Details) |
12 Months Ended | |
|---|---|---|
|
Sep. 30, 2025
CAD ($)
shares
|
Sep. 30, 2024
CAD ($)
shares
|
|
| RSUs | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Outstanding, end of period (in shares) | 0 | |
| PSUs | ||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | ||
| Outstanding, beginning of period (in shares) | 2,528,200 | 2,252,450 |
| Granted (in shares) | 674,259 | 799,418 |
| Exercised (in shares) | (765,318) | (280,265) |
| Forfeited (in shares) | (418,173) | (243,403) |
| Dividends (in shares) | 8,588 | |
| Outstanding, end of period (in shares) | 2,027,556 | 2,528,200 |
| Grant date fair value (in CAD per share) | $ | $ 159.44 | $ 137.90 |