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
	Oct. 28, 2012	Oct. 30, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net earnings attributable to Campbell Soup Company	$ 245	$ 265
Less: net earnings allocated to participating securities	$ 0	$ 2
Weighted average shares outstanding - basic	314	320
Effect of dilutive securities: stock options and other share-based payment awards	2	2
Weighted average shares outstanding - diluted	316	322
Net earnings attributable to Campbell Soup Company per common share: Basic	$ 0.78	$ 0.82
Net earnings attributable to Campbell Soup Company per common share: Diluted	$ 0.78	$ 0.82