Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 31, 2020	Oct. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,489,314	$ 1,418,818
Accumulated Amortization	1,234,992	1,139,444
Net Assets	254,322	279,374
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	827,232	791,647
Accumulated Amortization	703,009	655,119
Net Assets	124,223	136,528
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	380,838	358,661
Accumulated Amortization	277,219	242,058
Net Assets	103,619	116,603
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	192,812	184,304
Accumulated Amortization	186,763	181,124
Net Assets	6,049	3,180
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	43,096	42,929
Accumulated Amortization	28,716	25,581
Net Assets	14,380	17,348
In-process research and development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	1,214	1,200
Accumulated Amortization	0	0
Net Assets	1,214	1,200
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	44,122	40,077
Accumulated Amortization	39,285	35,562
Net Assets	$ 4,837	$ 4,515