Business And Geographic Segment Information (Schedule of Segment Reporting - Depreciation and Amortization) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 28, 2019	Jul. 29, 2018	Jul. 30, 2017
Segment Reporting Information [Line Items]
Depreciation and amortization		$ 446	$ 394	$ 318
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		162	158	118
Snacks [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		184	102	56
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	[1]	17	19	19
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization		$ 83	$ 115	$ 125

[1] Represents primarily corporate offices.