Income Taxes (Details 5) - USD ($) $ in Millions		May 31, 2016	May 31, 2015
Deferred Tax Assets Liabilities Net [Abstract]
Noncurrent deferred tax assets	[1]	$ 435	$ 219
Noncurrent deferred tax liabilities		(1,567)	(1,210)
Net deferred tax liabilities		$ 1,132	$ 991

[1] Noncurrent deferred tax assets are included in the line item "Other Assets" in our consolidated balance sheets.