INTANGIBLE ASSETS (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019	May 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross		$ 12,718		$ 12,718		$ 12,688
Additions & Adjustments, net	[1]			30
Accumulated Amortization		(8,630)		(8,630)		(7,409)
Expense		(400)	$ (407)	(1,221)	$ (1,265)
Intangible Assets, Net		4,088		$ 4,088		5,279
Weighted Average Useful Life	[2]			0 years
Developed technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross		5,422		$ 5,422		5,406
Additions & Adjustments, net	[1]			16
Accumulated Amortization		(4,082)		(4,082)		(3,467)
Expense				(615)
Intangible Assets, Net		1,340		$ 1,340		1,939
Weighted Average Useful Life	[2]			5 years
Cloud services and license support agreements and related relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross		5,705		$ 5,705		5,693
Additions & Adjustments, net	[1]			12
Accumulated Amortization		(3,222)		(3,222)		(2,711)
Expense				(511)
Intangible Assets, Net		2,483		$ 2,483		2,982
Weighted Average Useful Life	[2]			4 years
Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross		1,591		$ 1,591		1,589
Additions & Adjustments, net	[1]			2
Accumulated Amortization		(1,326)		(1,326)		(1,231)
Expense				(95)
Intangible Assets, Net		$ 265		$ 265		$ 358
Weighted Average Useful Life	[2]			4 years

[1] Amounts also include any net changes in intangible asset balances for the periods presented that resulted from foreign currency translations.

[2] Represents weighted-average useful lives (in years) of intangible assets acquired during fiscal 2020.