Pension and other postretirement plans - Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Pension Plans | International
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 237	$ 275
Interest cost	689	603
Expected return on plan assets	(417)	(377)
Amortization of prior service credit	(2)	(13)
Amortization of net actuarial (gain) loss	9	20
Total benefit cost	516	508
Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,507	2,744
Interest cost	4,752	4,175
Expected return on plan assets	(6,652)	(6,529)
Amortization of prior service credit	0	0
Amortization of net actuarial (gain) loss	0	0
Total benefit cost	607	390
Postretirement Benefit Costs | International
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1
Interest cost	3	3
Amortization of net actuarial (gain) loss	(14)	(16)
Total benefit cost	(10)	(12)
Postretirement Benefit Costs | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	70	100
Interest cost	754	765
Amortization of net actuarial (gain) loss	(147)	0
Total benefit cost	$ 677	$ 865