PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2019	May 31, 2018
Property, Plant And Equipment [Line Items]
Computer, network, machinery and equipment	$ 7,214	$ 6,156
Buildings and improvements	4,253	3,893
Furniture, fixtures and other	554	662
Land	896	868
Construction in progress	158	229
Total property, plant and equipment	13,075	11,808
Accumulated depreciation	(6,823)	(5,911)
Total property, plant and equipment, net	$ 6,252	$ 5,897
Minimum
Property, Plant And Equipment [Line Items]
Estimated Useful Lives	1 year
Maximum
Property, Plant And Equipment [Line Items]
Estimated Useful Lives	40 years
Computer, network, machinery and equipment | Minimum
Property, Plant And Equipment [Line Items]
Estimated Useful Lives	1 year
Computer, network, machinery and equipment | Maximum
Property, Plant And Equipment [Line Items]
Estimated Useful Lives	5 years
Buildings and improvements | Minimum
Property, Plant And Equipment [Line Items]
Estimated Useful Lives	1 year
Buildings and improvements | Maximum
Property, Plant And Equipment [Line Items]
Estimated Useful Lives	40 years
Furniture, fixtures and other | Minimum
Property, Plant And Equipment [Line Items]
Estimated Useful Lives	5 years
Furniture, fixtures and other | Maximum
Property, Plant And Equipment [Line Items]
Estimated Useful Lives	15 years