Document and Entity Information	6 Months Ended
	Nov. 25, 2012	Dec. 23, 2012
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Nov. 25, 2012
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	CAG
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
Entity Common Stock, Shares Outstanding		404,987,165