Share-Based Payments (Tables)

6 Months Ended

Feb. 11, 2012

Share-Based Payments [Abstract]

Weighted average fair value of the stock option awards granted, weighted average key assumptions

The weighted average fair value of the stock option awards granted during the twenty-four week periods ended February 11, 2012, and February 12, 2011, using the Black-Scholes-Merton multiple-option pricing valuation model, was $93.42 and $58.58 per share, respectively, using the following weighted average key assumptions:

	Twenty-Four Weeks Ended
	February 11, 2012			February 12, 2011
Expected price volatility		31	%		31	%
Risk-free interest rate		0.7	%		1.0	%
Weighted average expected lives (in years)		5.3			4.3
Forfeiture rate		10	%		10	%
Dividend yield		0	%		0	%