Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 3,121,058	$ 2,724,880	$ 2,422,532
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	1,508,224	1,357,364	1,205,880
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	369,125	308,419	287,381
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	283,337	247,631	239,964
Asia Pacific and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 960,372	$ 811,466	$ 689,307