Goodwill And Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	6 Months Ended
	Jan. 29, 2017	Jul. 31, 2016
Goodwill [Line Items]
Goodwill, Gross		$ 2,369
Accumulated Impairment Loss		(106)
Net Balance	$ 2,064	2,263
Goodwill, Impairment Loss	(191)
Foreign currency translation adjustment	(8)
Net Ending Balance	2,064
Americas Simple Meals and Beverages [Member]
Goodwill [Line Items]
Goodwill, Gross		775
Accumulated Impairment Loss		0
Net Balance	775	775
Goodwill, Impairment Loss	0
Foreign currency translation adjustment	0
Net Ending Balance	775
Global Biscuits and Snacks [Member]
Goodwill [Line Items]
Goodwill, Gross		757
Accumulated Impairment Loss		0
Net Balance	749	757
Goodwill, Impairment Loss	0
Foreign currency translation adjustment	(8)
Net Ending Balance	749
Campbell Fresh [Member]
Goodwill [Line Items]
Goodwill, Gross		837
Accumulated Impairment Loss		(106)
Net Balance	540	$ 731
Goodwill, Impairment Loss	(191)
Foreign currency translation adjustment	0
Net Ending Balance	$ 540