Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2012		Oct. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 735,326	[1]	$ 364,066
Accumulated Amortization	269,004		168,035
Net Assets	466,322		196,031
Developed And Core Technology
Finite-Lived Intangible Assets [Line Items]
Gross Assets	367,321	[1]	226,928
Accumulated Amortization	159,691		104,391
Net Assets	207,630		122,537
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Assets	179,657	[1]	80,238
Accumulated Amortization	48,368		31,250
Net Assets	131,289		48,988
Contract Rights Intangible
Finite-Lived Intangible Assets [Line Items]
Gross Assets	142,641	[1]	33,300
Accumulated Amortization	43,843		19,801
Net Assets	98,798		13,499
Covenants Not To Compete
Finite-Lived Intangible Assets [Line Items]
Gross Assets	2,530	[1]	2,530
Accumulated Amortization	2,354		2,105
Net Assets	176		425
Trademarks Trade Names
Finite-Lived Intangible Assets [Line Items]
Gross Assets	10,900	[1]	6,400
Accumulated Amortization	3,793		2,561
Net Assets	7,107		3,839
In-Process Research And Development (IPR&D)
Finite-Lived Intangible Assets [Line Items]
Gross Assets	17,696	[1],[2]	3,425	[3]
Net Assets	17,696	[2]	3,425	[3]
Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Gross Assets	14,581	[1]	11,245
Accumulated Amortization	10,955		7,927
Net Assets	$ 3,626		$ 3,318

[1] Included $370.7 million of intangible assets acquired during fiscal 2012.

[2] IPR&D is reclassified to core/developed technology upon completion or is written off upon abandonment.

[3] IPR&D is reclassified to core/developed technology upon completion.