INTANGIBLE ASSETS (Details) - USD ($) $ in Millions		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross, Beginning of the period		$ 11,401
Additions & Adjustments, net	[1]	71
Retirements		(469)
Intangible Assets, Gross, Ending of the period		11,003	$ 11,401
Accumulated Amortization, Beginning of the period		(7,663)
Expense		(1,379)	(1,586)	$ (1,689)
Retirements		469
Accumulated Amortization, Ending of the period		(8,573)	(7,663)
Intangible Assets, Net		2,430	3,738
Developed technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross, Beginning of the period		4,471
Additions & Adjustments, net	[1]	56
Retirements		(290)
Intangible Assets, Gross, Ending of the period		4,237	4,471
Accumulated Amortization, Beginning of the period		(3,290)
Expense		(621)
Retirements		290
Accumulated Amortization, Ending of the period		(3,621)	(3,290)
Intangible Assets, Net		$ 616	1,181
Weighted Average Useful Life	[2]	3 years
Cloud services and license support agreements and related relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross, Beginning of the period		$ 5,589
Additions & Adjustments, net	[1]	14
Retirements		(106)
Intangible Assets, Gross, Ending of the period		5,497	5,589
Accumulated Amortization, Beginning of the period		(3,271)
Expense		(669)
Retirements		106
Accumulated Amortization, Ending of the period		(3,834)	(3,271)
Intangible Assets, Net		$ 1,663	2,318
Weighted Average Useful Life	[2]	0 years
Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross, Beginning of the period		$ 1,341
Additions & Adjustments, net	[1]	1
Retirements		(73)
Intangible Assets, Gross, Ending of the period		1,269	1,341
Accumulated Amortization, Beginning of the period		(1,102)
Expense		(89)
Retirements		73
Accumulated Amortization, Ending of the period		(1,118)	(1,102)
Intangible Assets, Net		$ 151	$ 239
Weighted Average Useful Life	[2]	0 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 2021