Share-based compensation - Weighted average assumptions (Detail) |
12 Months Ended | |
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Oct. 31, 2022
yr
$ / shares
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Oct. 31, 2021
yr
$ / shares
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| Disclosure of terms and conditions of share-based payment arrangement [abstract] | ||
| Share price at grant date | $ / shares | $ 128.48 | $ 104.86 |
| Risk-free interest rate | 1.25% | 0.48% |
| Expected dividend yield | 3.66% | 4.59% |
| Expected share price volatility | 13.00% | 14.00% |
| Expected life of option | yr | 6 | 6 |
| X | ||||||||||
- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The option life of share options granted. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The percentage of an expected dividend used to calculate the fair value of share options granted. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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