Share-Based Payments (Tables)

12 Months Ended

Aug. 25, 2018

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 25, 2018			August 26, 2017			August 27, 2016
Expected price volatility		20	%		18	%		18	%
Risk-free interest rates		1.9	%		1.2	%		1.5	%
Weighted average expected lives (in years)		5.1			5.1			5.1
Forfeiture rate		10	%		10	%		10	%
Dividend yield		0	%		0	%		0	%

Stock Option Activity

The following table summarizes information about stock option activity for the year ended August 25, 2018:

	Number of Shares			Weighted Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding – August 26, 2017		1,798,055		$	493.18
Granted		284,335			587.57
Exercised		(297,616	)		298.02
Cancelled		(77,908	)		672.61
Outstanding – August 25, 2018		1,706,866			534.74		6.06	$	402,631
Exercisable		1,014,819			446.07		4.73		329,352
Expected to vest		622,842			664.77		8.02		38,387
Available for future grants		686,577