EARNINGS PER SHARE (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	May 31, 2013		May 31, 2012		May 31, 2011
Computation of Basic and Diluted Earnings Per Share [Abstract]
Net income	$ 10,925		$ 9,981		$ 8,547
Weighted average common shares outstanding	4,769		5,015		5,048
Dilutive effect of employee stock plans	75		80		80
Dilutive weighted average common shares outstanding	4,844		5,095		5,128
Basic earnings per share	$ 2.29		$ 1.99		$ 1.69
Diluted earnings per share	$ 2.26		$ 1.96		$ 1.67
Shares subject to anti-dilutive stock options and restricted stock-based awards excluded from calculation	208	[1]	110	[1]	57	[1]

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