Document and Entity Information Document - shares	9 Months Ended
	Apr. 29, 2018	May 31, 2018
Entity Information [Line Items]
Entity Registrant Name	CAMPBELL SOUP CO
Entity Central Index Key	0000016732
Current Fiscal Year End Date	--07-29
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Apr. 29, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		300,645,629
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes