Document and Entity Information Document - USD ($)	12 Months Ended
	Jul. 30, 2017	Sep. 20, 2017	Jan. 27, 2017
Entity Information [Line Items]
Entity Registrant Name	CAMPBELL SOUP CO
Entity Central Index Key	0000016732
Current Fiscal Year End Date	--07-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Jul. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		300,528,501
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 11,934,667,846