Consolidated Statements of Changes in Shareholders Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
Other comprehensive (gain) loss, tax	$ 44	$ 39	$ 63
Treasury Stock Shares Acquired	8,100,000	36,800,000	2,700,000
Cash dividends declared, per share	$ 0.80	$ 0.60	$ 0.56
Employee incentive plans and other, shares issued	3,700,000	6,700,000	4,200,000