Document and Entity Information	9 Months Ended
	Feb. 23, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	CONAGRA FOODS INC /DE/
Entity Central Index Key	0000023217
Current Fiscal Year End Date	--05-25
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Feb. 23, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
Trading Symbol	CAG
Amendment Flag	false
Entity Common Stock, Shares Outstanding	421,152,688