Business Combinations and Acquisition of Non-controlling Interest - Additional Information (Detail) (SpringSoft Inc, USD $) In Millions, unless otherwise specified	3 Months Ended
Jan. 31, 2013	Oct. 01, 2012
SpringSoft Inc
Business Acquisition [Line Items]
Percentage of acquisition of shares	8.40%	91.60%
Cash consideration for acquisition	$ 44.0

The cash outflow associated with the purchase of noncontrolling interest during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration