Business And Geographic Segment Information (Additional Product Information For 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
Soup [Member]
Segment Reporting Information [Line Items]
Net sales									2,368	2,355	2,407
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales									3,918	2,438	1,619
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales									1,082	1,108	1,118
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales									738	711	693
Other [Member]
Segment Reporting Information [Line Items]
Net sales									$ 1	$ 3	$ 0