Income Taxes - Rate Reconciliation Between Provision for Income Taxes and Taxes Computed at Statutory Federal Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Income Tax Disclosure [Abstract]
Statutory federal tax	$ 85,142	$ 134,084	$ 115,343
State tax (benefit), net of federal effect	(32,351)	(20,071)	(14,492)
Tax credits	(35,142)	(24,365)	(36,979)
Tax on foreign earnings less than U.S. statutory tax	(104,252)	(52,413)	(68,246)
Tax settlements	(14,691)	(7,057)	(16,479)
Stock-based compensation	(19,293)	(26,205)	5,709
Changes in valuation allowance	78,192	47,745	25,590
Integration of acquired technologies	27,927	36,443	37,525
Undistributed earnings of foreign subsidiaries	(974)	(9,610)	9,940
Tax impact of repatriation	0	166,152	0
Impact of tax restructuring	(171,979)	0	0
Impact of Tax Act rate change	51,075	0	0
Transition tax	63,107	0	0
Other	4,264	1,832	4,811
Provision (benefit) for income taxes	$ (68,975)	$ 246,535	$ 62,722