Pension and other postretirement plans - Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Pension Plans | International
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 275	$ 489
Interest cost	603	298
Expected return on plan assets	(377)	(393)
Amortization of prior service cost (credit)	(13)	(18)
Amortization of net actuarial (gain) loss	20	607
Total benefit cost	508	983
Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,744	5,187
Interest cost	4,175	3,583
Expected return on plan assets	(6,529)	(7,878)
Amortization of prior service cost (credit)	0	12
Amortization of net actuarial (gain) loss	0	2,766
Total benefit cost	390	3,670
Postretirement Benefit Costs | International
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	3
Interest cost	3	3
Amortization of net actuarial (gain) loss	(16)	(12)
Total benefit cost	(12)	(6)
Postretirement Benefit Costs | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	100	195
Interest cost	765	488
Amortization of net actuarial (gain) loss	0	263
Total benefit cost	$ 865	$ 946