Share-Based Payments (Tables)

3 Months Ended

Nov. 23, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Weighted Average for Key Assumptions Used in Determining Fair Value of Options Granted Related Share-Based Compensation Expense

The weighted average fair value of the stock option awards granted during the twelve week periods ended November 23, 2013, and November 17, 2012, using the Black-Scholes-Merton multiple-option pricing valuation model, was $96.39 and $98.09 per share, respectively, using the following weighted average key assumptions:

	Twelve Weeks Ended
	November 23, 2013			November 17, 2012
Expected price volatility		23	%		29	%
Risk-free interest rate		1.0	%		0.5	%
Weighted average expected lives (in years)		5.1			5.2
Forfeiture rate		9	%		10	%
Dividend yield		0	%		0	%