Share-Based Payments (Tables)

12 Months Ended

Aug. 27, 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 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 27, 2016			August 29, 2015			August 30, 2014
Expected price volatility		18	%		20	%		23	%
Risk-free interest rates		1.5	%		1.4	%		1.0	%
Weighted average expected lives (in years)		5.7			5.1			5.2
Forfeiture rate		10	%		9	%		9	%
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 27, 2016:

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding – August 29, 2015		1,769,429		$	327.90
Granted		378,415			745.81
Exercised		(334,799	)		239.94
Cancelled		(53,637	)		518.17
Outstanding – August 27, 2016		1,759,408			428.72		6.39	$	572,011
Exercisable		957,159			293.50		4.87		440,261
Expected to vest		722,024			590.04		8.20		117,997
Available for future grants		1,149,507