INTANGIBLE ASSETS (Details) - USD ($) $ in Millions		3 Months Ended
		Aug. 31, 2020	Aug. 31, 2019	May 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross		$ 11,413		$ 11,401
Additions & Adjustments, net	[1]	12
Accumulated Amortization		(8,008)		(7,663)
Expense		(345)	$ (414)
Intangible Assets, Net		3,405		3,738
Developed technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross		4,474		4,471
Additions & Adjustments, net	[1]	3
Accumulated Amortization		(3,448)		(3,290)
Expense		(158)
Intangible Assets, Net		1,026		1,181
Cloud services and license support agreements and related relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross		5,598		5,589
Additions & Adjustments, net	[1]	9
Accumulated Amortization		(3,435)		(3,271)
Expense		(164)
Intangible Assets, Net		2,163		2,318
Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross		1,341		1,341
Additions & Adjustments, net	[1]	0
Accumulated Amortization		(1,125)		(1,102)
Expense		(23)
Intangible Assets, Net		$ 216		$ 239

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