SEGMENT INFORMATION (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Segment reporting information [Line Items]
Revenues		$ 9,614	$ 9,562	$ 18,832	$ 18,755
Cloud services and license support expenses	[1]	1,022	956	2,003	1,870
Sales and marketing expenses	[1]	2,068	2,101	4,086	4,140
Margin		3,183	3,101	6,060	5,878
Operating Segments [Member]
Segment reporting information [Line Items]
Revenues	[2]	9,615	9,567	18,835	18,768
Expenses		3,917	3,866	7,650	7,608
Margin	[3]	5,698	5,701	11,185	11,160
Operating Segments [Member] | Cloud and License [Member]
Segment reporting information [Line Items]
Revenues	[2]	7,938	7,859	15,556	15,342
Cloud services and license support expenses		970	912	1,901	1,779
Sales and marketing expenses		1,856	1,834	3,612	3,577
Margin	[3]	5,112	5,113	10,043	9,986
Operating Segments [Member] | Hardware [Member]
Segment reporting information [Line Items]
Revenues		871	891	1,686	1,796
Hardware products and support expenses		277	325	541	642
Sales and marketing expenses		114	118	231	257
Margin	[3]	480	448	914	897
Operating Segments [Member] | Services [Member]
Segment reporting information [Line Items]
Revenues		806	817	1,593	1,630
Services expenses		700	677	1,365	1,353
Margin	[3]	$ 106	$ 140	$ 228	$ 277

[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 6 for an explanation of these adjustments and the table below for a reconciliation of our total operating segment revenues to our total consolidated 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.