Pension and other postretirement plans - Net Periodic Benefit Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Pension Plans | International
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 231	$ 281	$ 702	$ 838
Interest cost	688	642	2,062	1,887
Expected return on plan assets	(417)	(392)	(1,250)	(1,151)
Amortization of prior service credit	(2)	(13)	(6)	(38)
Amortization of net actuarial gain	7	20	24	61
Total benefit cost	507	538	1,532	1,597
Settlement loss	0	0	0	0
Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,507	2,744	7,522	8,233
Interest cost	4,752	4,176	14,257	12,526
Expected return on plan assets	(6,652)	(6,529)	(19,958)	(19,587)
Amortization of prior service credit	0	0	0	0
Amortization of net actuarial gain	0	0	0	0
Total benefit cost	663	391	1,877	1,172
Settlement loss	(56)	0	(56)	0
Postretirement Benefit Costs | International
Defined Benefit Plan Disclosure [Line Items]
Service cost		1		4
Interest cost		3		8
Amortization of net actuarial gain		(16)		(47)
Total benefit cost		(12)		(35)
Postretirement Benefit Costs | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	70	100	211	299
Interest cost	754	766	2,262	2,297
Amortization of net actuarial gain	(147)	0	(443)	0
Total benefit cost	$ 677	$ 866	$ 2,030	$ 2,596