Pension and Other Postretirement Plans - Net Periodic Benefit Cost (Detail) - Pension Plans [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3,054	$ 3,184	$ 6,875	$ 6,243
Interest cost	3,658	3,243	7,159	6,454
Expected return on plan assets	(5,489)	(5,265)	(10,981)	(10,443)
Amortization of prior service cost (credit)	(3)	11	(11)	23
Amortization of net actuarial loss	2,550	2,457	4,706	4,785
Total benefit cost	3,770	3,630	7,748	7,062
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	528	625	1,038	1,159
Interest cost	424	419	833	768
Expected return on plan assets	(393)	(358)	(773)	(643)
Amortization of prior service cost (credit)	(83)	(76)	(162)	(147)
Amortization of net actuarial loss	548	662	1,077	1,261
Total benefit cost	$ 1,024	$ 1,272	$ 2,013	$ 2,398