Summary Of Goodwill (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
Jul. 31, 2012
Goodwill and Intangible Assets Disclosure [Line Items]
Adjustment related to achievement of certain milestones relating to contingent consideration for an acquisition that closed prior to fiscal 2010	$ 1.8
Effects of foreign currency fluctuations	$ (0.6)

The increase (decrease) to the recorded value of goodwill for foreign currency translation adjustments.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 6

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_GoodwillTranslationAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration