Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 605,005	$ 557,204	$ 1,173,609	$ 1,099,247
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	297,388	286,113	572,318	563,700
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	73,112	75,025	145,047	146,908
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	58,535	53,242	111,781	114,094
Asia-Pacific and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 175,970	$ 142,824	$ 344,463	$ 274,545