Income Taxes - Schedule of Net Deferred Tax Liabilities (Details) - USD ($) $ in Millions		May 31, 2017	May 31, 2016
Deferred Tax Assets Liabilities Net [Abstract]
Noncurrent deferred tax assets(1)	[1]	$ 675	$ 435
Noncurrent deferred tax liabilities		(2,485)	(1,567)
Net deferred tax liabilities		$ (1,810)	$ (1,132)

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