Equity Plans (Tables)

9 Months Ended

May 30, 2019

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

Stock Options Granted and Valuation Assumptions

	Quarter ended				Nine months ended
	May 30, 2019	May 31, 2018			May 30, 2019			May 31, 2018
Stock options granted	—	—			—			2
Weighted-average grant-date fair value per share	—	$	24.14		$	19.50		$	18.61
Average expected life in years	—	5.4			5.4			5.5
Weighted-average expected volatility	—	45		%	44		%	44		%
Weighted-average risk-free interest rate	—	2.8		%	2.9		%	2.2		%
Expected dividend yield	—	0.0		%	0.0		%	0.0		%

Schedule of Restricted Stock Awards Activity

	Quarter ended				Nine months ended
	May 30, 2019		May 31, 2018		May 30, 2019		May 31, 2018
Restricted stock award shares granted	1		—		7		4
Weighted-average grant-date fair value per share	$	40.00	$	53.77	$	39.83	$	42.14

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				Nine months ended
	May 30, 2019		May 31, 2018		May 30, 2019		May 31, 2018
Stock-based compensation expense by caption
Cost of goods sold	$	24	$	20	$	73	$	62
Selling, general, and administrative	18		14		55		48
Research and development	16		14		48		41
	$	58	$	48	$	176	$	151
Stock-based compensation expense by type of award
Restricted stock awards	$	44	$	35	$	127	$	107
Stock options	6		13		25		44
Employee Stock Purchase Plan	8		—		24		—
	$	58	$	48	$	176	$	151