Share-Based Payments (Tables)

9 Months Ended

May 04, 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 thirty-six week periods ended May 4, 2013, and May 5, 2012, using the Black-Scholes-Merton multiple-option pricing valuation model, was $98.58 and $93.42 per share, respectively, using the following weighted average key assumptions:

	Thirty-Six Weeks Ended
	May 4, 2013			May 5, 2012
Expected price volatility		29	%		31	%
Risk-free interest rate		0.5	%		0.7	%
Weighted average expected lives (in years)		5.2			5.3
Forfeiture rate		10	%		10	%
Dividend yield		0	%		0	%