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Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
shares in Millions
Feb. 28, 2021
May 31, 2020
Feb. 23, 2020
Stockholders' equity:      
Common stock, shares issued 754.6 754.6  
Common stock, par value $ 0.10 $ 0.1 $ 0.1
Common stock in treasury, shares 142.8 144.8