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								12 Months Ended
	Jul. 28, 2013	Apr. 28, 2013	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 30, 2011	Jul. 28, 2013	Jul. 29, 2012	Jul. 31, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Income (Loss) from Continuing Operations Attributable to Parent									$ 689	$ 734	$ 752
Participating Securities Distributed And Undistributed Earnings For Continuing Operations									0	(4)	(9)
Income Available To Common Shareholders Continuing Operations									689	730	743
Earnings (loss) from discontinued operations	(275)	12	19	13	1	8	16	15	(231)	40	53
Participating Securities Distributed And Undistributed Earnings For Discontinued Operations									0	(1)	0
Income Available To Common Shareholders Discontinued Operations									(231)	39	53
Net earnings attributable to Campbell Soup Company	(158)	181	190	245	127	177	205	265	458	774	805
Less: net earnings allocated to participating securities									0	(5)	(9)
Net Income (Loss) Available to Common Stockholders, Basic									$ 458	$ 769	$ 796
Weighted average shares outstanding - basic									314	317	326
Effect of dilutive securities: stock options and other share-based payment awards									3	2	3
Weighted average shares outstanding - diluted									317	319	329
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.37	$ 0.54	$ 0.54	$ 0.74	$ 0.40	$ 0.53	$ 0.59	$ 0.78	$ 2.19	$ 2.30	$ 2.28
Earnings from continuing operations, per diluted share	$ 0.37	$ 0.53	$ 0.54	$ 0.73	$ 0.39	$ 0.53	$ 0.59	$ 0.77	$ 2.17	$ 2.29	$ 2.26
Earnings (Loss) from Discontinued Operations, Net of Tax, Per Basic Share	$ (0.88)	$ 0.04	$ 0.06	$ 0.04	$ 0.00	$ 0.03	$ 0.05	$ 0.05	$ (0.74)	$ 0.12	$ 0.16
Earnings (loss) from discontinued operations, per diluted share	$ (0.87)	$ 0.04	$ 0.06	$ 0.04	$ 0.00	$ 0.03	$ 0.05	$ 0.05	$ (0.73)	$ 0.12	$ 0.16
Earnings Per Share, Basic	$ (0.50)	$ 0.58	$ 0.61	$ 0.78	$ 0.40	$ 0.56	$ 0.64	$ 0.82	$ 1.46	$ 2.43	$ 2.44
Net earnings attributable to Campbell Soup Company per common share: Diluted	$ (0.50)	$ 0.57	$ 0.60	$ 0.78	$ 0.40	$ 0.55	$ 0.64	$ 0.82	$ 1.44	$ 2.41	$ 2.42