Goodwill And Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended
	Apr. 30, 2017	Jul. 31, 2016
Goodwill [Line Items]
Goodwill, Gross		$ 2,369
Accumulated Impairment Loss		(106)
Net Balance	$ 2,057	2,263
Goodwill, Impairment Loss	(191)
Foreign currency translation adjustment	(15)
Net Ending Balance	2,057
Americas Simple Meals and Beverages [Member]
Goodwill [Line Items]
Goodwill, Gross		775
Accumulated Impairment Loss		0
Net Balance	771	775
Goodwill, Impairment Loss	0
Foreign currency translation adjustment	(4)
Net Ending Balance	771
Global Biscuits and Snacks [Member]
Goodwill [Line Items]
Goodwill, Gross		757
Accumulated Impairment Loss		0
Net Balance	746	757
Goodwill, Impairment Loss	0
Foreign currency translation adjustment	(11)
Net Ending Balance	746
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