Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Feb. 25, 2023	Aug. 27, 2022
Current assets
Allowance for doubtful accounts	$ 0.5	$ 0.6
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000.0	10,000,000.0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 500,000	$ 500,000
Common stock, shares authorized (in shares)	120,000,000.0	120,000,000.0
Common stock, shares issued (in shares)	51,800,000	51,800,000
Treasury stock, at cost, shares (in shares)	21,200,000	21,500,000