Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail) - Reclassified from Accumulated Other Comprehensive Income [Member] - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2019	Aug. 25, 2018
Net Unrealized Gain (Loss) on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gains (losses) on marketable securities, taxes	$ 389	$ (234)
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net derivative activities, taxes	$ 530	$ 515