RESTRUCTURING ACTIVITIES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 31, 2014		Aug. 31, 2013
Restructuring Reserve [Line Items]
Accrued at Period Start	$ 169	[1]
Initial Costs	84	[2]
Adjustments to Cost	(15)	[3]
Cash Payments	(73)
Others	(2)	[4]
Accrued at Period End	163	[1]
Restructuring Expenses	69		56
Fiscal 2013 Oracle Restructuring [Member]
Restructuring Reserve [Line Items]
Accrued at Period Start	61	[5]
Initial Costs	83	[2],[5]
Adjustments to Cost	(3)	[3],[5]
Cash Payments	(62)	[5]
Others	(3)	[4],[5]
Accrued at Period End	76	[5]
Total Costs Accrued to Date	579	[5]
Total Expected Program Costs	705	[5]
Restructuring Expenses	80
Remaining Expenses to Incur	126
Fiscal 2013 Oracle Restructuring Plan, Expected Completion Date	May 31, 2015
Fiscal 2013 Oracle Restructuring [Member] | New software licenses and cloud software subscriptions [Member]
Restructuring Reserve [Line Items]
Accrued at Period Start	12	[5]
Initial Costs	22	[2],[5]
Adjustments to Cost	(1)	[3],[5]
Cash Payments	(18)	[5]
Accrued at Period End	15	[5]
Total Costs Accrued to Date	147	[5]
Total Expected Program Costs	158	[5]
Fiscal 2013 Oracle Restructuring [Member] | Software license updates and product support [Member]
Restructuring Reserve [Line Items]
Accrued at Period Start	5	[5]
Initial Costs	4	[2],[5]
Cash Payments	(2)	[5]
Accrued at Period End	7	[5]
Total Costs Accrued to Date	22	[5]
Total Expected Program Costs	34	[5]
Fiscal 2013 Oracle Restructuring [Member] | Hardware systems business [Member]
Restructuring Reserve [Line Items]
Accrued at Period Start	18	[5]
Initial Costs	28	[2],[5]
Adjustments to Cost	(1)	[3],[5]
Cash Payments	(16)	[5]
Others	(1)	[4],[5]
Accrued at Period End	28	[5]
Total Costs Accrued to Date	166	[5]
Total Expected Program Costs	208	[5]
Fiscal 2013 Oracle Restructuring [Member] | Services [Member]
Restructuring Reserve [Line Items]
Accrued at Period Start	11	[5]
Initial Costs	20	[2],[5]
Cash Payments	(17)	[5]
Accrued at Period End	14	[5]
Total Costs Accrued to Date	119	[5]
Total Expected Program Costs	166	[5]
Fiscal 2013 Oracle Restructuring [Member] | General and administrative and other [Member]
Restructuring Reserve [Line Items]
Accrued at Period Start	15	[5]
Initial Costs	9	[2],[5]
Adjustments to Cost	(1)	[3],[5]
Cash Payments	(9)	[5]
Others	(2)	[4],[5]
Accrued at Period End	12	[5]
Total Costs Accrued to Date	125	[5]
Total Expected Program Costs	139	[5]
Other Restructuring Plans [Member]
Restructuring Reserve [Line Items]
Accrued at Period Start	108	[6]
Initial Costs	1	[2],[6]
Adjustments to Cost	(12)	[3],[6]
Cash Payments	(11)	[6]
Others	1	[4],[6]
Accrued at Period End	$ 87	[6]

[1] The balances at August 31, 2014 and May 31, 2014 included $112 million and $100 million, respectively, recorded in other current liabilities, and $51 million and $69 million, respectively, recorded in other non-current liabilities.

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

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

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

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

[6] Other restructuring plans presented in the table above included condensed information for other 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 period presented but for which the current impact to our consolidated statements of operations was not significant.