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CONSOLIDATED STATEMENTS OF EQUITY PARENTHETICAL - $ / shares
shares in Millions
12 Months Ended
May. 31, 2015
May. 31, 2014
May. 31, 2013
Equity:      
Beginning common stock shares outstanding 4,464.0 4,646.0 4,905.0
Common stock issued under stock-based compensation plans 70.0 95.0 84.0
Common stock issued under stock purchase plans 3.0 3.0 3.0
Repurchase of common stock (193.7) (280.4) (346.1)
Ending common stock shares outstanding 4,343.0 4,464.0 4,646.0
Dividends declared per common share (in dollars per share) $ 0.51 $ 0.48 $ 0.30