Share-Based Payments (Tables)

3 Months Ended

Nov. 22, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

The weighted average fair value of the stock option awards granted during the twelve week periods ended November 22, 2014, and November 23, 2013, using the Black-Scholes-Merton multiple-option pricing valuation model, was $104.66 and $96.39 per share, respectively, using the following weighted average key assumptions:

	Twelve Weeks Ended
	November 22, 2014			November 23, 2013
Expected price volatility		20	%		23	%
Risk-free interest rate		1.4	%		1.0	%
Weighted average expected lives (in years)		5.0			5.1
Forfeiture rate		9	%		9	%
Dividend yield		0	%		0	%