Business And Geographic Segment Information (Schedule of Segment Reporting - Capital Expenditures) (Details) - USD ($) $ in Millions		12 Months Ended
		Aug. 01, 2021	Aug. 02, 2020	Jul. 28, 2019
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 275	$ 299	$ 384
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		61	52	156
Snacks [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		153	153	134
Corporate and Other
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment	[1]	61	64	35
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Property, Plant, and Equipment		$ 0	$ 30	$ 59

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