Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2018	Oct. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,376,059	$ 1,166,198
Accumulated Amortization	941,520	912,355
Net Assets	434,539	253,843
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	749,186	647,975
Accumulated Amortization	544,173	526,796
Net Assets	205,013	121,179
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	354,091	278,811
Accumulated Amortization	175,383	166,886
Net Assets	178,708	111,925
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	183,478	174,615
Accumulated Amortization	173,524	172,178
Net Assets	9,954	2,437
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	42,929	25,329
Accumulated Amortization	18,426	17,401
Net Assets	24,503	7,928
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross Assets	12,700	6,600
Accumulated Amortization	0	0
Net Assets	12,700	6,600
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	33,675	32,868
Accumulated Amortization	30,014	29,094
Net Assets	$ 3,661	$ 3,774