Document and Entity Information (USD $)	12 Months Ended
	May 27, 2012	Jun. 24, 2012	Nov. 25, 2011
Document and Entity Information [Abstract]
Entity Registrant Name	CONAGRA FOODS INC /DE/
Entity Central Index Key	0000023217
Document Type	10-K
Document Period End Date	May 27, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--05-27
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 9,865,276,377
Entity Common Stock, Shares Outstanding		407,683,921