Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Feb. 26, 2012	May 29, 2011
Condensed Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 8.2	$ 7.8
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	151,406,097	157,412,899