Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 28, 2013	Apr. 29, 2012	Apr. 28, 2013	Apr. 29, 2012
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net earnings attributable to Campbell Soup Company	$ 181	$ 177	$ 616	$ 647
Less: net earnings allocated to participating securities	0	(1)	0	(3)
Net earnings available to Campbell Soup Company common shareowners	$ 181	$ 176	$ 616	$ 644
Weighted average shares outstanding - basic	314	316	314	318
Effect of dilutive securities: stock options and other share-based payment awards	3	2	3	2
Weighted average shares outstanding - diluted	317	318	317	320
Net earnings attributable to Campbell Soup Company per common share: Basic	$ 0.58	$ 0.56	$ 1.96	$ 2.03
Net earnings attributable to Campbell Soup Company per common share: Diluted	$ 0.57	$ 0.55	$ 1.94	$ 2.01