Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 779,714	$ 695,381	$ 2,325,976	$ 2,028,236
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	365,414	358,201	1,126,624	1,028,108
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	90,657	80,260	273,136	234,259
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	71,981	64,119	210,805	183,023
Asia-Pacific and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 251,662	$ 192,801	$ 715,411	$ 582,846