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Net (Loss) Income Per Share (Additional Information) (Detail) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share, Basic and Diluted [Abstract]
Anti-dilutive common equivalent shares excluded from computation of diluted net income (loss) per share	13.7	14.8

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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