Business And Geographic Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jul. 28, 2019	Apr. 28, 2019	Jan. 27, 2019	Oct. 28, 2018	Jul. 29, 2018	Apr. 29, 2018	Jan. 28, 2018	Oct. 29, 2017	Jul. 28, 2019	Jul. 29, 2018	Jul. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 1,780	$ 1,953	$ 2,172	$ 2,202	$ 1,745	$ 1,618	$ 1,614	$ 1,638	$ 8,107	$ 6,615	$ 5,837
Meals & Beverages [Member]
Segment Reporting Information [Line Items]
Net sales									4,322	4,305	4,340
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales									3,784	2,307	1,497
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net sales									$ 1	$ 3	$ 0