INCOME TAXES - Components of Deffered Tax Liabilities and Assets Continued (Details) - USD ($) $ in Millions	May 31, 2018	May 31, 2017
Components of Deferred Tax Assets and Liabilities [Abstract]
Non-current deferred tax assets	$ 1,491	$ 1,143
Non-current deferred tax liabilities (in other non-current liabilities)	(57)	(460)
Net deferred tax assets	$ 1,434	$ 683