Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) (USD $) In Millions, except Share data	Aug. 28, 2011	May 29, 2011
Current assets
Allowance for doubtful accounts	$ 7.7	$ 7.8
Common stockholders' equity
Common stock, par value	$ 5	$ 5
Common stock, authorized	1,200,000,000	1,200,000,000
Common stock, issued	567,907,172	567,907,172
Treasury stock, common shares	153,586,405	157,412,899