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v3.22.2.2

Share-based payments - Disclosure of range of exercise prices, number of options and weighted average remaining contractual life (Details) | 12 Months Ended |  |
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Sep. 30, 2022 shares $ / shares | Sep. 30, 2021 shares $ / shares | Sep. 30, 2020 shares $ / shares
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 6,882,845 | 8,012,077 | 8,934,097
Weighted average remaining contractual life of options outstanding | 4 years 6 months 14 days |  |
Weighted average exercise price of options outstanding (in CAD per share) | $ 66.36 | $ 64.49 | $ 61.33
Number of options exercisable (in shares) | shares | 5,837,921 | 5,781,579 |
Weighted average exercise price of options exercisable (in CAD per share) | $ 61.02 | $ 54.76 |
23.65 to 38.79 |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 982,507 |  |
Weighted average remaining contractual life of options outstanding | 1 year 21 days |  |
Weighted average exercise price of options outstanding (in CAD per share) | $ 33.01 |  |
Number of options exercisable (in shares) | shares | 982,507 |  |
Weighted average exercise price of options exercisable (in CAD per share) | $ 33.01 |  |
23.65 to 38.79 | Minimum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | 23.65 |  |
23.65 to 38.79 | Maximum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | $ 38.79 |  |
39.47 to 50.94 |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 970,493 |  |
Weighted average remaining contractual life of options outstanding | 2 years 8 months 15 days |  |
Weighted average exercise price of options outstanding (in CAD per share) | $ 45.46 |  |
Number of options exercisable (in shares) | shares | 970,493 |  |
Weighted average exercise price of options exercisable (in CAD per share) | $ 45.46 |  |
39.47 to 50.94 | Minimum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | 39.47 |  |
39.47 to 50.94 | Maximum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | $ 50.94 |  |
52.63 to 63.72 |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 2,532,301 |  |
Weighted average remaining contractual life of options outstanding | 4 years 5 months 12 days |  |
Weighted average exercise price of options outstanding (in CAD per share) | $ 63.04 |  |
Number of options exercisable (in shares) | shares | 2,532,301 |  |
Weighted average exercise price of options exercisable (in CAD per share) | $ 63.04 |  |
52.63 to 63.72 | Minimum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | 52.63 |  |
52.63 to 63.72 | Maximum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | $ 63.72 |  |
67.04 to 87.65 |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 1,311,981 |  |
Weighted average remaining contractual life of options outstanding | 5 years 11 months 1 day |  |
Weighted average exercise price of options outstanding (in CAD per share) | $ 84.05 |  |
Number of options exercisable (in shares) | shares | 1,005,535 |  |
Weighted average exercise price of options exercisable (in CAD per share) | $ 83.60 |  |
67.04 to 87.65 | Minimum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | 67.04 |  |
67.04 to 87.65 | Maximum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | $ 87.65 |  |
97.84 to 115.01 |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Number of options outstanding (in shares) | shares | 1,085,563 |  |
Weighted average remaining contractual life of options outstanding | 7 years 10 months 28 days |  |
Weighted average exercise price of options outstanding (in CAD per share) | $ 101.61 |  |
Number of options exercisable (in shares) | shares | 347,085 |  |
Weighted average exercise price of options exercisable (in CAD per share) | $ 103.69 |  |
97.84 to 115.01 | Minimum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | 97.84 |  |
97.84 to 115.01 | Maximum |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |
Exercise price (in CAD per share) | $ 115.01 |  |

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