RESTRUCTURING ACTIVITIES (Details) - USD ($) $ in Millions		12 Months Ended
		May 31, 2021		May 31, 2020		May 31, 2019
Restructuring reserve [Line Items]
Accrued at period start	[2]	$ 151	[1]	$ 262		$ 282
Initial Costs	[2],[3]	457		278		480
Adjustments to Cost	[2],[4]	(26)		(28)		(57)
Cash Payments	[2]	(376)		(299)		(443)
Others	[2],[5]	19		(62)		0
Accrued at period end	[2]	225		151	[1]	262
Fiscal 2021 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member]
Restructuring reserve [Line Items]
Accrued at period start	[1],[2]	138
Initial Costs	[2],[3]	455
Adjustments to Cost	[2],[4]	(25)
Cash Payments	[2]	(371)
Others	[2],[5]	19
Accrued at period end	[2]	216		138	[1]
Fiscal 2021 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Other [Member]
Restructuring reserve [Line Items]
Accrued at period start	[1],[2],[6]	22
Initial Costs	[2],[3],[6]	137
Adjustments to Cost	[2],[4],[6]	3
Cash Payments	[2],[6]	(110)
Others	[2],[5],[6]	5
Accrued at period end	[2],[6]	57		22	[1]
Fiscal 2021 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Cloud and License [Member] | Operating Segments [Member]
Restructuring reserve [Line Items]
Accrued at period start	[1],[2]	75
Initial Costs	[2],[3]	225
Adjustments to Cost	[2],[4]	(22)
Cash Payments	[2]	(171)
Others	[2],[5]	12
Accrued at period end	[2]	119		75	[1]
Fiscal 2021 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Hardware [Member] | Operating Segments [Member]
Restructuring reserve [Line Items]
Accrued at period start	[1],[2]	14
Initial Costs	[2],[3]	39
Adjustments to Cost	[2],[4]	(2)
Cash Payments	[2]	(34)
Others	[2],[5]	(1)
Accrued at period end	[2]	16		14	[1]
Fiscal 2021 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Services [Member] | Operating Segments [Member]
Restructuring reserve [Line Items]
Accrued at period start	[1],[2]	27
Initial Costs	[2],[3]	54
Adjustments to Cost	[2],[4]	(4)
Cash Payments	[2]	(56)
Others	[2],[5]	3
Accrued at period end	[2]	24		27	[1]
Fiscal 2021 Activity [Member] | Other Restructuring Plans [Member]
Restructuring reserve [Line Items]
Accrued at period start	[1],[2],[7]	13
Initial Costs	[2],[3],[7]	2
Adjustments to Cost	[2],[4],[7]	(1)
Cash Payments	[2],[7]	(5)
Others	[2],[5],[7]	0
Accrued at period end	[2],[7]	9		13	[1]
Fiscal 2020 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2]	138	[1]	213
Initial Costs	[2],[3]			278
Adjustments to Cost	[2],[4]			(17)
Cash Payments	[2]			(291)
Others	[2],[5]			(45)
Accrued at period end	[2]			138	[1]	213
Fiscal 2020 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Other [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2],[6]	22	[1]	108
Initial Costs	[2],[3],[6]			59
Adjustments to Cost	[2],[4],[6]			10
Cash Payments	[2],[6]			(111)
Others	[2],[5],[6]			(44)
Accrued at period end	[2],[6]			22	[1]	108
Fiscal 2020 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Cloud and License [Member] | Operating Segments [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2]	75	[1]	72
Initial Costs	[2],[3]			140
Adjustments to Cost	[2],[4]			(24)
Cash Payments	[2]			(112)
Others	[2],[5]			(1)
Accrued at period end	[2]			75	[1]	72
Fiscal 2020 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Hardware [Member] | Operating Segments [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2]	14	[1]	18
Initial Costs	[2],[3]			28
Adjustments to Cost	[2],[4]			(1)
Cash Payments	[2]			(31)
Others	[2],[5]			0
Accrued at period end	[2]			14	[1]	18
Fiscal 2020 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Services [Member] | Operating Segments [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2]	27	[1]	15
Initial Costs	[2],[3]			51
Adjustments to Cost	[2],[4]			(2)
Cash Payments	[2]			(37)
Others	[2],[5]			0
Accrued at period end	[2]			27	[1]	15
Fiscal 2020 Activity [Member] | Other Restructuring Plans [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2],[7]	$ 13	[1]	49
Initial Costs	[2],[3],[7]			0
Adjustments to Cost	[2],[4],[7]			(11)
Cash Payments	[2],[7]			(8)
Others	[2],[5],[7]			(17)
Accrued at period end	[2],[7]			13	[1]	49
Fiscal 2019 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2]			213		0
Initial Costs	[2],[3]					475
Adjustments to Cost	[2],[4]					1
Cash Payments	[2]					(262)
Others	[2],[5]					(1)
Accrued at period end	[2]					213
Fiscal 2019 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Other [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2],[6]			108		0
Initial Costs	[2],[3],[6]					190
Adjustments to Cost	[2],[4],[6]					4
Cash Payments	[2],[6]					(87)
Others	[2],[5],[6]					1
Accrued at period end	[2],[6]					108
Fiscal 2019 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Cloud and License [Member] | Operating Segments [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2]			72		0
Initial Costs	[2],[3]					191
Adjustments to Cost	[2],[4]					(4)
Cash Payments	[2]					(113)
Others	[2],[5]					(2)
Accrued at period end	[2]					72
Fiscal 2019 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Hardware [Member] | Operating Segments [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2]			18		0
Initial Costs	[2],[3]					53
Adjustments to Cost	[2],[4]					0
Cash Payments	[2]					(35)
Others	[2],[5]					0
Accrued at period end	[2]					18
Fiscal 2019 Activity [Member] | Fiscal 2019 Oracle Restructuring [Member] | Services [Member] | Operating Segments [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2]			15		0
Initial Costs	[2],[3]					41
Adjustments to Cost	[2],[4]					1
Cash Payments	[2]					(27)
Others	[2],[5]					0
Accrued at period end	[2]					15
Fiscal 2019 Activity [Member] | Other Restructuring Plans [Member]
Restructuring reserve [Line Items]
Accrued at period start	[2],[6]			$ 49		282
Initial Costs	[2],[3],[6]					5
Adjustments to Cost	[2],[4],[6]					(58)
Cash Payments	[2],[6]					(181)
Others	[2],[5],[6]					1
Accrued at period end	[2],[6]					$ 49

[1] As of May 31, 2021 and 2020, substantially all restructuring liabilities have been recorded in other current liabilities within our consolidated balance sheets.

[2] Restructuring costs recorded for individual line items primarily related to employee severance costs.

[3] Costs recorded for the respective restructuring plans during the current period presented.

[4] All plan adjustments were changes in estimates whereby increases and decreases in costs were generally recorded to operating expenses in the period of adjustments.

[5] Represents foreign currency translation and certain other adjustments.

[6] Represents employee related severance costs for functions that are not included within our operating segments and certain other restructuring costs.

[7] Other restructuring plans presented in the tables above included condensed information for certain Oracle-based plans and other plans associated with certain of our acquisitions whereby we continued to make cash outlays to settle obligations under these plans during the periods presented but for which the periodic impact to our condensed consolidated statements of operations was not significant.