Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 695,381	$ 615,204	$ 2,028,236	$ 1,788,813
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	358,201	316,902	1,028,108	889,220
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	80,260	66,946	234,259	211,993
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	64,119	63,056	183,023	174,838
Asia-Pacific and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 192,801	$ 168,300	$ 582,846	$ 512,762