Business And Geographic Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Aug. 02, 2020	Apr. 26, 2020	Jan. 26, 2020	Oct. 27, 2019	Jul. 28, 2019	Apr. 28, 2019	Jan. 27, 2019	Oct. 28, 2018	Aug. 02, 2020	Jul. 28, 2019	Jul. 29, 2018
Segment Reporting Information [Line Items]
Net sales	$ 2,108	$ 2,238	$ 2,162	$ 2,183	$ 1,780	$ 1,953	$ 2,172	$ 2,202	$ 8,691	$ 8,107	$ 6,615
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Net sales									4,646	4,252	4,233
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales									4,045	3,854	2,379
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net sales									$ 0	$ 1	$ 3