Business And Geographic Segment Information (Additional Product Information For Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Feb. 01, 2015	Jan. 31, 2016	Feb. 01, 2015
Segment Reporting Information [Line Items]
Net sales	$ 2,201	$ 2,234	$ 4,404	$ 4,489
Soups [Member]
Segment Reporting Information [Line Items]
Net sales	821	865	1,678	1,759
Baked Snacks [Member]
Segment Reporting Information [Line Items]
Net sales	664	669	1,302	1,332
Simple Meals [Member]
Segment Reporting Information [Line Items]
Net sales	447	425	876	842
Beverages [Member]
Segment Reporting Information [Line Items]
Net sales	$ 269	$ 275	$ 548	$ 556