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		6 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 27, 2013	Jan. 29, 2012
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net earnings attributable to Campbell Soup Company	$ 190	$ 205	$ 435	$ 470
Less: net earnings allocated to participating securities	0	(1)	0	(3)
Net earnings available to Campbell Soup Company common shareowners	$ 190	$ 204	$ 435	$ 467
Weighted average shares outstanding - basic	314	318	314	319
Effect of dilutive securities: stock options and other share-based payment awards	2	2	2	2
Weighted average shares outstanding - diluted	316	320	316	321
Net earnings attributable to Campbell Soup Company per common share: Basic	$ 0.61	$ 0.64	$ 1.39	$ 1.46
Net earnings attributable to Campbell Soup Company per common share: Diluted	$ 0.60	$ 0.64	$ 1.38	$ 1.45