Equity - Additional Information (Detail) In Millions, unless otherwise specified	6 Months Ended
Mar. 30, 2013 Stockholder Rights Plan [Member]	Mar. 11, 2013 Amended and Restated 2008 Equity Incentive Plan [Member] Minimum [Member]	Mar. 11, 2013 Amended and Restated 2008 Equity Incentive Plan [Member] Maximum [Member]
Expiration date of Rights Plan	January 1, 2013
Number of shares authorized for issuance		10.0	31.5

- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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