Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Sep. 23, 2012	Jun. 24, 2012
Options Outstanding Number of Shares
Beginning balance	3,902
Exercised	(46)
Forfeited or expired	(21)
Ending balance	3,835	3,902
Exercisable at September 23, 2012	2,684
Weighted-Average Exercise Price
Beginning balance	$ 25.14
Exercised	$ 20.72
Forfeited or expired	$ 22.13
Ending balance	$ 25.21	$ 25.14
Exercisable at September 23, 2012	$ 26.79
Weighted-Average Remaining Contractual Term (in years)
Outstanding at June 24, 2012	4 years 6 months 11 days	4 years 9 months 15 days
Outstanding at September 23, 2012	4 years 6 months 11 days	4 years 9 months 15 days
Exercisable at September 23, 2012	3 years 3 months 22 days
Aggregate Intrinsic Value
Outstanding at September 23, 2012	$ 31,319
Exercisable at September 23, 2012	$ 18,206

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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