RESTRUCTURING ACTIVITIES Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
Restructuring Reserve [Line Items]
Restructuring Expenses	$ 207	$ 183	$ 352
Accrued restructuring liabilities, current (in other current liabilities)	86	100
Accrued restructuring liabilities, non-current (in other non-current liabilities)	$ 34	$ 69
Facilities related restructuring, contract termination and other costs [Member]
Restructuring Reserve [Line Items]
Restructuring Expenses			$ 46