Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 26, 2020	Apr. 28, 2019	Apr. 26, 2020	Apr. 28, 2019
Segment Reporting Information [Line Items]
Net sales	$ 2,238	$ 1,953	$ 6,583	$ 6,327
Soup [Member]
Segment Reporting Information [Line Items]
Net sales	681	528	2,144	2,020
Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	1,040	967	3,005	2,922
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	324	270	886	829
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	193	188	548	555
Other [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 0	$ 0	$ 1