Associate Benefit Plans (Tables)

12 Months Ended

Aug. 31, 2013

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of Stock Option Activity

	2013					2012					2011
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding – beginning of year		1,377		$	49.79		1,697		$	44.17		2,394		$	38.76
Granted		360			69.52		308			66.69		364			54.67
Exercised		(504	)		42.97		(538	)		41.65		(1,060	)		35.56
Cancelled/forfeited		(9	)		62.43		(90	)		50.39		(1	)		14.26
Outstanding – end of year		1,224		$	58.30		1,377		$	49.79		1,697		$	44.17
Exercisable – end of year		385		$	48.78		505		$	42.68		584		$	39.46
Weighted average fair value of options granted	$	15.33				$	17.67				$	14.48

Summary Of Assumptions Used For Options Granted

	2013			2012			2011
Expected life (years)		3.8			4.8			4.8
Risk-free interest rate		0.55	%		1.0	%		1.1	%
Volatility		32.9	%		35.2	%		35.1	%
Dividend yield		1.70	%		1.70	%		1.70	%

Summary Of Stock Options By Range Of Exercise Price

Range of Exercise Prices	Number of Options Outstanding at August 31, 2013		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price		Intrinsic Value		Number of Options Exercisable at August 31, 2013		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price		Intrinsic Value
$23.41 – $38.07		87		2.0	$	37.08	$	3,373		87		2.0	$	37.08	$	3,373
38.08 – 44.17		222		3.0		43.80		7,163		110		2.8		43.43		3,587
44.18 – 65.76		281		3.7		53.82		6,226		127		3.2		52.76		2,947
65.77 – 73.71		634		5.7		68.28		4,896		61		5.1		66.69		571
		1,224		4.5	$	58.30	$	21,658		385		3.1	$	48.78	$	10,478

Restricted Stock Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of Restricted Stock Award Activity

	Shares			Weighted Average Grant Date Fair Value
Nonvested at September 1, 2012		535		$	52.37
Granted		141			70.37
Vested		(159	)		45.23
Forfeited/Cancelled		(12	)		58.90
Nonvested at August 31, 2013		505		$	59.47

Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary Of Restricted Stock Award Activity

	2013				2012
	Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
Non-vested restricted stock unit awards at September 1, 2012		192	$	54.90		189	$	54.68
Granted		4		76.20		3		70.78
Vested		—		—		—		—
Cancelled/forfeited		—		—		—		—
Non-vested restricted stock unit awards at August 31, 2013		196	$	55.32		192	$	54.90