Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 964,134	$ 852,970	$ 2,659,842	$ 2,509,613
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	432,692	407,408	1,245,570	1,231,951
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	94,297	90,074	277,951	257,502
Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	96,344	84,968	291,175	272,486
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	77,819	65,709	230,586	203,486
Asia-Pacific and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 262,982	$ 204,811	$ 614,560	$ 544,188