Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 30, 2021	Oct. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,510,096	$ 1,489,314
Accumulated Amortization	1,276,287	1,234,992
Net Assets	233,809	254,322
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	846,611	827,232
Accumulated Amortization	724,695	703,009
Net Assets	121,916	124,223
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	381,495	380,838
Accumulated Amortization	292,556	277,219
Net Assets	88,939	103,619
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	192,595	192,812
Accumulated Amortization	187,705	186,763
Net Assets	4,890	6,049
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	43,095	43,096
Accumulated Amortization	29,935	28,716
Net Assets	13,160	14,380
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross Assets	914	1,214
Accumulated Amortization	0	0
Net Assets	914	1,214
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	45,386	44,122
Accumulated Amortization	41,396	39,285
Net Assets	$ 3,990	$ 4,837