Earnings per Share - Summary of Earnings Per Share (Parenthetical) (Detail) - $ / shares |
3 Months Ended | ||
|---|---|---|---|
Jan. 31, 2023 |
Oct. 31, 2022 |
Jan. 31, 2022 |
|
| Earnings per share [abstract] | |||
| Outstanding options excluded from calculation of diluted earnings per share | 3,576,586 | 2,397,160 | |
| Weighted average Exercise price of average outstanding share options excluded from the calculation of diluted earnings per share | $ 66.74 | $ 70.05 | |