Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 820,401	$ 769,426
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	407,799	384,574
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	83,886	85,465
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	65,073	68,389
Asia-Pacific and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 263,643	$ 230,998