Pension and Other Postretirement Plans - Net Periodic Benefit Cost (Detail) - Pension Plans [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5,235	$ 3,577	$ 10,293	$ 7,155
Interest cost	4,026	4,492	7,943	8,989
Expected return on plan assets	(6,175)	(5,794)	(12,334)	(11,597)
Amortization of prior service credit	(22)	(15)	(42)	(30)
Amortization of net actuarial loss	3,622	1,544	7,019	3,088
Total benefit cost	6,686	3,804	12,879	7,605
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	459	486	1,030	970
Interest cost	251	424	514	846
Expected return on plan assets	(304)	(407)	(635)	(807)
Amortization of prior service credit	(68)	(76)	(142)	(152)
Amortization of net actuarial loss	729	428	1,462	855
Total benefit cost	$ 1,067	$ 855	$ 2,229	$ 1,712