Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 861,327	$ 836,242	$ 1,695,708	$ 1,656,643
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	404,389	416,744	812,878	824,543
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	89,284	83,542	183,655	167,428
Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	105,315	84,850	194,830	187,518
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	80,540	72,703	152,768	137,776
Asia-Pacific and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 181,799	$ 178,403	$ 351,577	$ 339,378