Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 31, 2018	Oct. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,395,571	$ 1,166,198
Accumulated Amortization	1,035,167	912,355
Net Assets	360,404	253,843
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	773,147	647,975
Accumulated Amortization	598,956	526,796
Net Assets	174,191	121,179
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	358,524	278,811
Accumulated Amortization	204,382	166,886
Net Assets	154,142	111,925
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	183,953	174,615
Accumulated Amortization	177,191	172,178
Net Assets	6,762	2,437
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	42,929	25,329
Accumulated Amortization	21,944	17,401
Net Assets	20,985	7,928
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	35,818	32,868
Accumulated Amortization	32,694	29,094
Net Assets	3,124	3,774
In-process research and development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	1,200	6,600
Net Assets	$ 1,200	$ 6,600