Pension and Other Postretirement Plans - Net Periodic Benefit Cost (Detail) - Pension Plans [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3,577	$ 2,944	$ 7,155	$ 6,626
Interest cost	4,492	3,768	8,989	7,408
Expected return on plan assets	(5,794)	(5,489)	(11,597)	(10,981)
Amortization of prior service credit	(15)	(3)	(30)	(11)
Amortization of net actuarial loss	1,544	2,550	3,088	4,706
Total benefit cost	3,804	3,770	7,605	7,748
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	486	528	970	1,027
Interest cost	424	424	846	844
Expected return on plan assets	(407)	(393)	(807)	(773)
Amortization of prior service credit	(76)	(83)	(152)	(162)
Amortization of net actuarial loss	428	548	855	1,077
Total benefit cost	$ 855	$ 1,024	$ 1,712	$ 2,013