Business And Geographic Segment Information (Schedule of Segment Reporting - Capital Expenditures) (Details) - USD ($) $ in Millions		12 Months Ended
		Aug. 02, 2020	Jul. 28, 2019	Jul. 29, 2018
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 299	$ 384	$ 407
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		52	156	187
Snacks [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		153	134	91
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment	[1]	64	35	41
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 30	$ 59	$ 88

[1] Represents primarily corporate offices and enterprise-wide information technology systems.