INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	May. 31, 2015
Income Taxes [Abstract]
Effective income tax rate	24.40%	19.70%
Net deferred tax assets	$ 1,000		$ 993
Income tax examinations	Our U.S. federal and, with some exceptions, our state income tax returns have been examined for all years prior to fiscal 2003 and we are no longer subject to audit for those periods. With some exceptions, we are generally no longer subject to tax examinations in non-U.S. jurisdictions for years prior to fiscal 1997.