Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 776,836	$ 680,069	$ 1,546,262	$ 1,332,855
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	376,636	350,489	761,210	669,908
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	97,014	78,395	182,479	154,068
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	70,435	57,206	138,824	118,904
Asia-Pacific and Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated	$ 232,751	$ 193,979	$ 463,749	$ 389,975