Income Taxes - Components of (Benefit) Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Income Tax Disclosure [Abstract]
Federal		$ (1,120)	$ 25,420	$ (6,106)
State		2,025	5,565	2,670
Foreign		140,430	92,498	80,195
Current income tax expense (benefit), total		141,335	123,483	76,759
Federal		(139,547)	95,003	(23,510)
State		(25,661)	24,440	11,950
Foreign		(45,102)	3,609	(2,477)
Deferred income tax expense (benefit), total	$ 172,000	(210,310)	123,052	(14,037)
Provision (benefit) for income taxes		$ (68,975)	$ 246,535	$ 62,722