Share-Based Payments (Tables)

6 Months Ended

Feb. 13, 2016

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 twenty-four week periods ended February 13, 2016, and February 14, 2015, using the Black-Scholes-Merton multiple-option pricing valuation model, was $156.19 and $106.17 per share, respectively, using the following weighted average key assumptions:

	Twenty-Four Weeks Ended
	February 13, 2016			February 14, 2015
Expected price volatility		18	%		20	%
Risk-free interest rate		1.5	%		1.4	%
Weighted average expected lives (in years)		5.7			5.1
Forfeiture rate		10	%		9	%
Dividend yield		0	%		0	%