Stock-Based Compensation (Tables)

3 Months Ended

Nov. 30, 2013

Stock-Based Compensation [Abstract]

Fair Value Of Options Granted Estimated Using Black-Scholes Option Pricing Model Assumptions

	Thirteen Weeks Ended
	November 30, 2013			December 1, 2012
Expected life (in years)		3.9			3.8
Risk-free interest rate		0.93	%		0.55	%
Expected volatility		26.59	%		32.86	%
Expected dividend yield		1.70	%		1.70	%

Summary Of Stock Options

	Options			Weighted- Average Exercise Price per Share		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Outstanding on August 31, 2013		1,224		$	58.30
Granted		399			81.76
Exercised		(83	)		48.59
Canceled		—			—
Outstanding on November 30, 2013		1,540		$	64.91		5.03	$	20,338
Exercisable on November 30, 2013		655		$	53.56		3.71	$	15,248

Non-Vested Restricted Share Award Activity

	Shares			Weighted- Average Grant-Date Fair Value
Non-vested restricted share awards at August 31, 2013		505		$	59.47
Granted		111			81.76
Vested		(131	)		47.02
Canceled/Forfeited		(2	)		66.41
Non-vested restricted share awards at November 30, 2013		483		$	67.94

	Shares		Weighted Average Grant Date Fair Value
Non-vested restricted stock unit awards at August 31, 2013		196	$	55.32
Granted		1		78.76
Vested		—		—
Cancelled/forfeited		—		—
Non-vested restricted stock unit awards at November 30, 2013		197	$	55.49