Income Taxes - Schedule of Net Deferred Tax Liabilities (Details) - USD ($) $ in Millions		May 31, 2019	May 31, 2018
Deferred Tax Assets Liabilities Net [Abstract]
Noncurrent deferred tax assets	[1]	$ 1,340	$ 1,263
Noncurrent deferred tax liabilities		(2,821)	(2,867)
Net deferred tax liabilities		$ (1,481)	$ (1,604)

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