Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Nov. 24, 2019	May 26, 2019
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 2.2	$ 2.2
Common stock, par value (in dollars per share)	$ 5	$ 5
Common stock, authorized (in shares)	1,200,000,000	1,200,000,000
Common stock, issued (in shares)	584,219,229	584,219,229
Treasury stock, at cost (in shares)	97,405,416	98,133,747