Note 13 (Detail) In Millions, unless otherwise specified			3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
Jul. 31, 2012	Apr. 30, 2011	Jul. 31, 2011 Because of Net Loss [Member]	Jul. 31, 2011 Because of Net Loss [Member]	Jul. 31, 2012 Stock Options [Member]	Jul. 31, 2011 Stock Options [Member]	Jul. 31, 2012 Stock Options [Member]	Jul. 31, 2011 Stock Options [Member]	Jul. 31, 2012 Included in EPS [Member]
Prepaid Stock Purchase Contracts, Shares Included in Basic Earnings Per Share									9.4
Tangible Equity Units, Rate	7.25%	7.25%
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			0.1	0.4	4.9	5.7	4.9	5.7

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Accounting Standards Codification

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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-Name Accounting Standards Codification

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