Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 680,069	$ 605,005	$ 1,332,855	$ 1,173,609
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	350,489	297,388	669,908	572,318
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	78,395	73,112	154,068	145,047
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	57,206	58,535	118,904	111,781
Asia-Pacific and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 193,979	$ 175,970	$ 389,975	$ 344,463