Income Tax Provision - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Tax Reassessment Cash Liability	$ 15.9
Deferred Tax Liabilities Undistributed Foreign Earnings		2.1
Undistributed earnings from litigation settlement gain		$ 7.5

Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed.

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

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-Name Accounting Standards Codification

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