INTANGIBLE ASSETS (Details) - USD ($) $ in Millions		12 Months Ended
		May 31, 2020	May 31, 2019	May 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross, Beginning of the period		$ 12,688
Additions & Adjustments, net	[1]	45
Retirements		(1,332)
Intangible Assets, Gross, Ending of the period		11,401	$ 12,688
Accumulated Amortization, Beginning of the period		(7,409)
Expense		(1,586)	(1,689)	$ (1,620)
Retirements		1,332
Accumulated Amortization, Ending of the period		(7,663)	(7,409)
Intangible Assets, Net		3,738	5,279
Developed technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross, Beginning of the period		5,406
Additions & Adjustments, net	[1]	31
Retirements		(966)
Intangible Assets, Gross, Ending of the period		4,471	5,406
Accumulated Amortization, Beginning of the period		(3,467)
Expense		(789)
Retirements		966
Accumulated Amortization, Ending of the period		(3,290)	(3,467)
Intangible Assets, Net		$ 1,181	1,939
Weighted Average Useful Life	[2]	4 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		$ 5,693
Additions & Adjustments, net	[1]	12
Retirements		(116)
Intangible Assets, Gross, Ending of the period		5,589	5,693
Accumulated Amortization, Beginning of the period		(2,711)
Expense		(676)
Retirements		116
Accumulated Amortization, Ending of the period		(3,271)	(2,711)
Intangible Assets, Net		$ 2,318	2,982
Weighted Average Useful Life	[2]	4 years
Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross, Beginning of the period		$ 1,589
Additions & Adjustments, net	[1]	2
Retirements		(250)
Intangible Assets, Gross, Ending of the period		1,341	1,589
Accumulated Amortization, Beginning of the period		(1,231)
Expense		(121)
Retirements		250
Accumulated Amortization, Ending of the period		(1,102)	(1,231)
Intangible Assets, Net		$ 239	$ 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