DOCUMENT AND ENTITY INFORMATION - USD ($)	12 Months Ended
	May 31, 2016	Jun. 15, 2016	Nov. 30, 2015
Document and Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	May 31, 2016
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2016
Trading Symbol	ORCL
Entity Registrant Name	Oracle Corporation
Entity Central Index Key	0001341439
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--05-31
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Entity Common Stock, Shares Outstanding (in shares)		4,122,730,000
Entity Public Float (in dollars)			$ 118,269,080,000