Business And Geographic Segment Information (Schedule of Segment Reporting - Capital Expenditures) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 29, 2018	Jul. 30, 2017	Jul. 31, 2016
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 407	$ 338	$ 341
Americas Simple Meals and Beverages [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		187	117	105
Global Biscuits and Snacks [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		133	127	122
Campbell Fresh [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		46	47	74
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment	[1]	$ 41	$ 47	$ 40

[1] Represents primarily corporate offices.