Share-Based Payments (Tables)

6 Months Ended

Feb. 15, 2014

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 twenty-four week periods ended February 15, 2014, and February 9, 2013, using the Black-Scholes-Merton multiple-option pricing valuation model, was $96.92 and $98.09 per share, respectively, using the following weighted average key assumptions:

	Twenty-Four Weeks Ended
	February 15, 2014			February 9, 2013
Expected price volatility		23	%		29	%
Risk-free interest rate		1.0	%		0.5	%
Weighted average expected lives (in years)		5.2			5.2
Forfeiture rate		9	%		10	%
Dividend yield		0	%		0	%