SEGMENT INFORMATION (Details) - USD ($) $ in Millions		3 Months Ended
		Aug. 31, 2018	Aug. 31, 2017
Segment reporting information [Line Items]
Revenues		$ 9,193	$ 9,104
Cloud services and license support expenses	[1]	913	857
Sales and marketing expenses	[1]	2,039	1,989
Margin		5,458	5,432
Total for operating segments [Member]
Segment reporting information [Line Items]
Revenues	[2]	9,201	9,129
Expenses		3,743	3,697
Margin	[3]	5,458	5,432
Total for operating segments [Member] | Cloud and License [Member]
Segment reporting information [Line Items]
Revenues	[2]	7,484	7,326
Cloud services and license support expenses		867	819
Sales and marketing expenses		1,744	1,677
Margin	[3]	4,873	4,830
Total for operating segments [Member] | Hardware [Member]
Segment reporting information [Line Items]
Revenues		904	943
Hardware products and support expenses		317	365
Sales and marketing expenses		139	174
Margin	[3]	448	404
Total for operating segments [Member] | Services [Member]
Segment reporting information [Line Items]
Revenues		813	860
Services expenses		676	662
Margin	[3]	$ 137	$ 198

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

[2] Cloud and license revenues 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 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 product 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.