Document and Entity Information Document - shares	3 Months Ended
	Oct. 29, 2017	Nov. 30, 2017
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	Oct. 29, 2017
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		300,606,995
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes