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Document and Entity Information (USD $)	12 Months Ended
Document and Entity Information (USD $)	May 31, 2011	Nov. 30, 2010	Jul. 18, 2011 Class A Convertible Common Stock	Jul. 18, 2011 Class B Common Stock	Nov. 30, 2010 Class B Common Stock
Document Type	10-K
Amendment Flag	false
Document Period End Date	May 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Trading Symbol	NKE
Entity Common Stock, Shares Outstanding			89,989,447	384,840,843
Entity Registrant Name	NIKE INC
Entity Central Index Key	0000320187
Current Fiscal Year End Date	--05-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Public Float		$ 2,005,831,959			$ 33,459,424,185