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Supplemental Disclosure of Noncash Activities (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Jan. 31, 2013
Senior exchangeable notes exchanged for Class A Common Stock (in Shares)	18,305
Stock Issued During Period, Shares, Conversion of Convertible Securities (in Shares)	3,396,102
Noncash or Part Noncash Acquisition, Other Assets Acquired (in Dollars)	$ 0.6

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Senior exchangeable notes exchanged for Class A Common Stock

+ References

No definition available.

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- Definition

The amount of assets that an Entity acquires in a noncash (or part noncash) acquisition that are not presented as a separate disclosure or not otherwise listed in the existing taxonomy. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-Number 95

-Paragraph 32

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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