Segment Information (Schedule Of Segment Reporting - Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 28, 2019	Apr. 29, 2018	Apr. 28, 2019	Apr. 29, 2018
Segment Reporting Information [Line Items]
Net sales	$ 2,178	$ 1,878	$ 7,129	$ 5,743
Meals and Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	1,024	1,033	3,513	3,501
Global Biscuits and Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	1,154	843	3,615	2,239
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 2	$ 1	$ 3