Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jul. 31, 2021	Oct. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,547,399	$ 1,489,314
Accumulated Amortization	1,297,425	1,234,992
Net Assets	249,974	254,322
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	884,603	827,232
Accumulated Amortization	736,125	703,009
Net Assets	148,478	124,223
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	381,703	380,838
Accumulated Amortization	300,441	277,219
Net Assets	81,262	103,619
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	192,359	192,812
Accumulated Amortization	187,909	186,763
Net Assets	4,450	6,049
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	43,095	43,096
Accumulated Amortization	30,545	28,716
Net Assets	12,550	14,380
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross Assets		1,214
Accumulated Amortization		0
Net Assets		1,214
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	45,639	44,122
Accumulated Amortization	42,405	39,285
Net Assets	$ 3,234	$ 4,837