Business And Geographic Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 30, 2016	Nov. 01, 2015
Segment Reporting Information [Line Items]
Net sales	$ 2,202	$ 2,203
Soup [Member]
Segment Reporting Information [Line Items]
Net sales	863	864
Baked Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	653	634
Other Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	429	429
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	$ 257	$ 276