Goodwill And Intangible Assets (Goodwill) (Details) $ in Millions	6 Months Ended
	Jan. 28, 2018 USD ($)		Jul. 30, 2017 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 2,115	[1]
Goodwill, Acquired During Period	202
Goodwill, Impairment Loss	(75)
Foreign currency translation adjustment	17
Ending Balance	2,259	[1]
Americas Simple Meals and Beverages [Member]
Goodwill [Line Items]
Beginning Balance	780
Goodwill, Acquired During Period	202
Goodwill, Impairment Loss	0
Foreign currency translation adjustment	0
Ending Balance	982
Global Biscuits and Snacks [Member]
Goodwill [Line Items]
Beginning Balance	795
Goodwill, Acquired During Period	0
Goodwill, Impairment Loss	0
Foreign currency translation adjustment	17
Ending Balance	812
Campbell Fresh [Member]
Goodwill [Line Items]
Beginning Balance	540	[1]
Goodwill, Acquired During Period	0
Goodwill, Impairment Loss	(75)
Foreign currency translation adjustment	0
Ending Balance	465	[1]
Goodwill, Accumulated Impairment Loss	$ (372)		$ (297)

[1] The Campbell Fresh segment includes accumulated impairment charges of $372 as of January 28, 2018, and $297 as of July 30, 2017 related to the Bolthouse Farms carrot and carrot ingredients reporting unit and the Garden Fresh Gourmet reporting unit.