Stock-Based Compensation (Detail) - (Table 1)	6 Months Ended
Jun. 30, 2012	May 25, 2012	May 22, 2009	May 27, 2007	May 26, 2006
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Common stock authorized	15,644,000	15,644,000	9,144,000	3,487,500	2,700,000
Stock-based awards, including restricted stock and stock options granted, net of expired or cancelled	(8,655,000)
Common stock available for grant of stock-based awards as of June 30, 2012	6,989,000

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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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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