EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		12 Months Ended
		May 31, 2022	May 31, 2021	May 31, 2020
Shares Under Restricted Stock-based Awards [Abstract]
Beginning balance		110	101	99
Granted		65	54	50
Vested and issued		(38)	(34)	(34)
Canceled		(9)	(11)	(14)
Ending balance		128	110	101
Weighted Average Grant Date Fair Value [Abstract]
Total grant date fair value of restricted stock-based awards, vested and issued		$ 1,900	$ 1,600	$ 1,500
Beginning balance		$ 51.87	$ 48.36	$ 43.01
Granted		85.07	54.95	53.38
Vested and issued		50.52	46.88	42.67
Canceled		63.25	50.40	46.81
Ending balance		$ 68.34	$ 51.87	$ 48.36
Unrecognized compensation expense related to non-vested restricted stock-based awards		$ 5,900
Shares Under Stock Option [Abstract]
Beginning balance		107	176	222
Granted and assumed		0	0	0
Exercised		(10)	(52)	(44)
Canceled		0	(17)	(2)
Ending balance		97	107	176
Vested		65
Expected to vest	[1]	12
Total		77
Weighted Average Exercise Price [Abstract]
Beginning balance		$ 40.14	$ 38.86	$ 37.78
Granted and assumed		0	0	0
Exercised		34.34	32.05	33.18
Canceled		0	51.02	44.76
Ending balance		40.70	$ 40.14	$ 38.86
Vested		35.81
Expected to vest	[1]	50.38
Total		$ 37.97
Weighted Average Remaining Contract Term (in years) [Abstract]
Vested		1 year 9 months 29 days
Expected to vest	[1]	3 years 8 months 1 day
Total		2 years 1 month 6 days
Aggregate Intrinsic Value (in millions) [Abstract]
Vested	[2]	$ 2,360
Expected to vest	[1],[2]	245
Total	[2]	$ 2,605
Closing stock price		$ 71.92
Unrecognized compensation expense for shares expected to vest		$ 190
Shares not expected to vest		20
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation		$ 2,613	$ 1,837	$ 1,590
Estimated income tax benefit included in provision for income taxes		(593)	(413)	(343)
Total stock-based compensation, net of estimated income tax benefit		2,020	1,424	1,247
Other Postretirement Plans [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total defined benefit plan pension expense		67	105	$ 97
Aggregate projected benefit obligation		1,100	1,400
Aggregate net liability (funded status)		$ 580	$ 889
Employee Stock Purchase Plan [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Stock purchase price as a percentage of the fair market value on the purchase date		95.00%
Shares reserved for future issuances under the purchase plan		39
Common stock issued under stock purchase plans		2	2	2
Cloud services and license support [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation		$ 205	$ 134	$ 110
Hardware [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation		15	11	11
Services [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation		67	55	54
Sales and marketing [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation		448	313	261
Research and development [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation		1,633	1,188	1,035
General and administrative [Member]
Stock-based compensation expense and valuations of stock awards [Abstract]
Total stock-based compensation		$ 245	$ 136	$ 119
Restricted Stock Units [Member]
Weighted Average Grant Date Fair Value [Abstract]
Weighted average recognition period of unrecognized compensation expense for shares expected to vest		2 years 11 months 4 days
Employee Stock Options [Member]
Weighted Average Grant Date Fair Value [Abstract]
Weighted average recognition period of unrecognized compensation expense for shares expected to vest		2 years 11 months 23 days

[1] The unrecognized compensation expense calculated under the fair value method for shares expected to vest (unvested shares net of expected forfeitures) as of May 31, 2022 was approximately $190 million and is expected to be recognized over a weighted-average period of 2.98 years. Approximately 20 million shares outstanding as of May 31, 2022 were not expected to vest.

[2] The aggregate intrinsic value was calculated based on the gross difference between our closing stock price on the last trading day of fiscal 2022 of $71.92 and the exercise prices for all “in-the-money” options outstanding, excluding tax effects.