SEGMENT INFORMATION (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Segment reporting information [Line Items]
Revenues		$ 9,800	$ 9,614	$ 19,167	$ 18,832
Cloud services and license support expenses	[1]	1,064	1,022	2,075	2,003
Sales and marketing expenses	[1]	1,836	2,068	3,690	4,086
Margin		3,583	3,183	6,794	6,060
Operating Segments [Member]
Segment reporting information [Line Items]
Revenues	[2]	9,800	9,615	19,168	18,835
Expenses		3,553	3,917	7,066	7,650
Margin	[3]	6,247	5,698	12,102	11,185
Operating Segments [Member] | Cloud and License [Member]
Segment reporting information [Line Items]
Revenues	[2]	8,204	7,938	16,038	15,556
Cloud services and license support expenses		1,008	970	1,966	1,901
Sales and marketing expenses		1,620	1,856	3,253	3,612
Margin	[3]	5,576	5,112	10,819	10,043
Operating Segments [Member] | Hardware [Member]
Segment reporting information [Line Items]
Revenues		844	871	1,658	1,686
Hardware products and support expenses		236	277	475	541
Sales and marketing expenses		94	114	192	231
Margin	[3]	514	480	991	914
Operating Segments [Member] | Services [Member]
Segment reporting information [Line Items]
Revenues		752	806	1,472	1,593
Services expenses		595	700	1,180	1,365
Margin	[3]	$ 157	$ 106	$ 292	$ 228

[1] Exclusive of amortization of intangible assets, which is shown separately.

[2] Cloud and license revenues presented for management reporting included revenues related to cloud and license obligations that would have otherwise been recorded by the acquired businesses as independent entities but were not recognized in our condensed consolidated statements of operations for the periods presented due to business combination accounting requirements. See Note 9 of Notes to Consolidated Financial Statements included in our Annual Report on Form 10-K for the year ended May 31, 2020 for an explanation of these adjustments and the table below for a reconciliation of our total operating segment revenues to our total revenues as reported in our condensed consolidated statements of operations.

[3] The margins reported reflect only the direct controllable costs of each line of business and do not include allocations of research and development, general and administrative and certain other allocable expenses, net. Additionally, the margins reported above do not reflect amortization of intangible assets, acquisition related and other expenses, restructuring expenses, stock-based compensation, interest expense or certain other non-operating income, net.