Equity Plans (Tables)

6 Months Ended

Feb. 28, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock Options Granted and Valuation Assumptions

	Quarter ended				Six months ended
	February 28, 2019	March 1, 2018			February 28, 2019			March 1, 2018
Stock options granted	—	1			—			2
Weighted-average grant-date fair value per share	—	$	18.61		$	19.50		$	18.13
Average expected life in years	—	5.5			5.4			5.5
Weighted-average expected volatility	—	44		%	44		%	44		%
Weighted-average risk-free interest rate	—	2.2		%	2.9		%	2.2		%
Expected dividend yield	—	0.0		%	0.0		%	0.0		%

Schedule of Restricted Stock Awards Activity

	Quarter ended				Six months ended
	February 28, 2019		March 1, 2018		February 28, 2019		March 1, 2018
Restricted stock award shares granted	—		2		6		4
Weighted-average grant-date fair value per share	$	37.01	$	43.21	$	39.83	$	41.51

Employee Stock Purchase Plan Valuation Assumptions

Weighted-average grant-date fair value per share	$	10.92
Average expected life in years	0.5
Weighted-average expected volatility	47		%
Weighted-average risk-free interest rate	2.5		%
Expected dividend yield	0.0		%

Stock-based Compensation Expense by Caption

	Quarter ended				Six months ended
	February 28, 2019		March 1, 2018		February 28, 2019		March 1, 2018
Stock-based compensation expense by caption
Cost of goods sold	$	23	$	22	$	49	$	42
Selling, general, and administrative	18		16		37		34
Research and development	16		14		32		27
	$	57	$	52	$	118	$	103
Stock-based compensation expense by type of award
Restricted stock awards	$	42	$	38	$	83	$	72
Stock options	7		14		19		31
Employee Stock Purchase Plan	8		—		16		—
	$	57	$	52	$	118	$	103