Business And Geographic Segment Information (Schedule of Segment Reporting - Depreciation and Amortization) (Details) - USD ($) $ in Millions		12 Months Ended
		Aug. 02, 2020	Jul. 28, 2019	Jul. 29, 2018
Segment Reporting Information [Line Items]
Depreciation and amortization		$ 328	$ 446	$ 394
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		134	162	158
Snacks [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		175	184	102
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	[1]	19	17	19
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	[2]	$ 0	$ 83	$ 115

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

[2] Depreciation and amortization are no longer recognized once businesses are classified as held for sale/discontinued operations