Pension and other postretirement plans - Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2025	Jan. 31, 2024
Pension Plans | International
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 232	$ 237
Interest cost	623	689
Expected return on plan assets	(638)	(417)
Amortization of prior service credit	(2)	(2)
Amortization of net actuarial gain	(67)	9
Total benefit cost	148	516
Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,531	2,507
Interest cost	4,691	4,752
Expected return on plan assets	(6,609)	(6,652)
Amortization of prior service credit	0	0
Amortization of net actuarial gain	474	0
Total benefit cost	1,087	607
Postretirement Benefit Costs | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	59	70
Interest cost	650	754
Amortization of net actuarial gain	(126)	(147)
Total benefit cost	$ 583	$ 677