Share-Based Payments (Tables)

12 Months Ended

Aug. 29, 2015

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 following table presents the weighted average for key assumptions used in determining the fair value of options granted and the related share-based compensation expense:

	Year Ended
	August 29, 2015			August 30, 2014			August 31, 2013
Expected price volatility		20	%		23	%		29	%
Risk-free interest rates		1.4	%		1.0	%		0.5	%
Weighted average expected lives (in years)		5.1			5.2			5.2
Forfeiture rate		9	%		9	%		10	%
Dividend yield		0	%		0	%		0	%

Stock Option Activity

The Company generally issues new shares when options are exercised. The following table summarizes information about stock option activity for the year ended August 29, 2015:

	Number of Shares			Weighted Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding – August 30, 2014		1,838,888		$	269.32
Granted		329,700			508.84
Exercised		(364,465	)		186.17
Cancelled		(34,694	)		431.59
Outstanding – August 29, 2015		1,769,429			327.90		6.32	$	705,102
Exercisable		981,591			238.21		4.88		479,195
Expected to vest		716,933			439.65		8.11		205,575
Available for future grants		1,479,663