Business And Geographic Segment Information (Schedule of Segment Reporting - Capital Expenditures) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 28, 2019	Jul. 29, 2018	Jul. 30, 2017
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 384	$ 407	$ 338
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		156	187	117
Snacks [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		134	91	75
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment	[1]	35	41	47
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 59	$ 88	$ 99

[1] Represents primarily corporate offices.