v3.24.3
Employee benefits - Pension and other post-employment benefits - Sensitivity Analysis of Key Assumptions (Parenthetical) (Detail)
12 Months Ended
Oct. 31, 2024
Defined benefit pension plans [member] | Impact of 100 bps in discount rate [member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Percentage of reasonably possible increase in actuarial assumption 1.00%
Percentage of reasonably possible decrease in actuarial assumption 1.00%
Defined benefit pension plans [member] | Impact of 50 bps in rate of increase in future compensation [member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Percentage of reasonably possible increase in actuarial assumption 0.50%
Percentage of reasonably possible decrease in actuarial assumption 0.50%
Defined benefit pension plans [member] | Impact of increase in longevity of one additional year [member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Period of reasonably possible increase in actuarial assumption 1 year
Defined benefit pension plans [member] | Impact of 100 bps in Healthcare cost trend rate [member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Percentage of reasonably possible increase in actuarial assumption 1.00%
Percentage of reasonably possible decrease in actuarial assumption 1.00%
Post employment plan [member] | Impact of 100 bps in discount rate [member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Percentage of reasonably possible increase in actuarial assumption 1.00%
Percentage of reasonably possible decrease in actuarial assumption 1.00%
Post employment plan [member] | Impact of 50 bps in rate of increase in future compensation [member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Percentage of reasonably possible increase in actuarial assumption 0.50%
Percentage of reasonably possible decrease in actuarial assumption 0.50%
Post employment plan [member] | Impact of increase in longevity of one additional year [member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Period of reasonably possible increase in actuarial assumption 1 year
Post employment plan [member] | Impact of 100 bps in Healthcare cost trend rate [member]  
Disclosure of sensitivity analysis for actuarial assumptions [line items]  
Percentage of reasonably possible increase in actuarial assumption 1.00%
Percentage of reasonably possible decrease in actuarial assumption 1.00%