Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2019	Oct. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 1,396,735	$ 1,395,571
Accumulated Amortization	1,064,548	1,035,167
Net Assets	332,187	360,404
Core/developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	773,147	773,147
Accumulated Amortization	615,315	598,956
Net Assets	157,832	174,191
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	358,644	358,524
Accumulated Amortization	214,037	204,382
Net Assets	144,607	154,142
Contract rights intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	184,260	183,953
Accumulated Amortization	178,614	177,191
Net Assets	5,646	6,762
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	42,928	42,929
Accumulated Amortization	23,116	21,944
Net Assets	19,812	20,985
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross Assets	1,200	1,200
Accumulated Amortization	0	0
Net Assets	1,200	1,200
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	36,556	35,818
Accumulated Amortization	33,466	32,694
Net Assets	$ 3,090	$ 3,124