Document and Entity Information	9 Months Ended
	Feb. 24, 2013	Mar. 24, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	CONAGRA FOODS INC /DE/
Entity Central Index Key	0000023217
Current Fiscal Year End Date	--05-27
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Feb. 24, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Trading Symbol	CAG
Amendment Flag	false
Entity Common Stock, Shares Outstanding		416,805,822