Goodwill And Intangible Assets (Goodwill) (Details) $ in Millions	9 Months Ended
	Apr. 29, 2018 USD ($)		Jul. 30, 2017 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 2,115	[1]
Goodwill, Acquired During Period	3,069
Goodwill, Impairment Loss	(540)
Foreign currency translation adjustment	(36)
Ending Balance	4,608	[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	(3)
Ending Balance	979
Global Biscuits and Snacks [Member]
Goodwill [Line Items]
Beginning Balance	795
Goodwill, Acquired During Period	2,867
Goodwill, Impairment Loss	0
Foreign currency translation adjustment	(33)
Ending Balance	3,629
Campbell Fresh [Member]
Goodwill [Line Items]
Beginning Balance	540	[1]
Goodwill, Acquired During Period	0
Goodwill, Impairment Loss	(540)
Foreign currency translation adjustment	0
Ending Balance	0	[1]
Goodwill, Accumulated Impairment Loss	$ (837)		$ (297)

[1] The Campbell Fresh segment includes accumulated impairment charges of $837 as of April 29, 2018, and $297 as of July 30, 2017 related to the Bolthouse Farms carrot and carrot ingredients reporting unit, the deli reporting unit, and the Bolthouse Farms refrigerated beverages and salad dressings reporting unit.