EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	May 31, 2012		May 31, 2011		May 31, 2010
Computation of Basic and Diluted Earnings Per Share [Abstract]
Net income	$ 9,981		$ 8,547		$ 6,135
Weighted average common shares outstanding	5,015		5,048		5,014
Dilutive effect of employee stock plans	80		80		59
Diluted weighted average common shares outstanding	5,095		5,128		5,073
Basic earnings per share	$ 1.99		$ 1.69		$ 1.22
Diluted earnings per share	$ 1.96		$ 1.67		$ 1.21
Shares subject to anti-dilutive stock options and restricted stock-based awards excluded from calculation	110	[1]	57	[1]	141	[1]

[1] These weighted shares relate to anti-dilutive stock options and restricted stock-based awards as calculated using the treasury stock method (described above) and could be dilutive in the future. See Note 14 for information regarding the exercise prices of our outstanding, unexercised options.