Quarterly Data (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended													12 Months Ended
	Jul. 29, 2012		Apr. 29, 2012		Jan. 29, 2012		Oct. 30, 2011		Jul. 31, 2011		May 01, 2011	Jan. 30, 2011	Oct. 31, 2010	Jul. 29, 2012	Jul. 31, 2011	Aug. 01, 2010
Quarterly Financial Data [Abstract]
Net sales	$ 1,613		$ 1,821		$ 2,112		$ 2,161		$ 1,607		$ 1,813	$ 2,127	$ 2,172	$ 7,707	$ 7,719	$ 7,676
Gross profit	621		706		811		854		639		732	838	894
Net earnings attributable to Campbell Soup Company	127	[1]	177	[1]	205	[1]	265	[1]	100	[2]	187	239	279	774	805	844
Net earnings attributable to Campbell Soup Company per common share: Basic	$ 0.40		$ 0.56		$ 0.64		$ 0.82		$ 0.31		$ 0.58	$ 0.72	$ 0.82	$ 2.43	$ 2.44	$ 2.44
Dividends	$ 0.29		$ 0.29		$ 0.29		$ 0.29		$ 0.29		$ 0.29	$ 0.29	$ 0.275	$ 1.16	$ 1.145	$ 1.075
Net earnings attributable to Campbell Soup Company per common share: Diluted	$ 0.40	[1]	$ 0.55	[1]	$ 0.64	[1]	$ 0.82	[1]	$ 0.31	[2]	$ 0.57	$ 0.71	$ 0.82	$ 2.41	$ 2.42	$ 2.42
Market price per share, High	$ 34.58		$ 34.04		$ 34.12		$ 34.00		$ 35.66		$ 35.00	$ 36.99	$ 37.59
Market price per share, Low	$ 31.32		$ 31.25		$ 31.22		$ 29.69		$ 32.80		$ 32.66	$ 33.44	$ 35.32
Restructuring charges, after tax			3		2		1		41					6		8
Restructuring charges per diluted share			$ 0.01		$ 0.01				$ 0.12					$ 0.02		$ 0.02
Business Combination, Acquisition Related Costs After Tax	$ 3
BusinessCombinationAcquisitionRelatedCostsPerDilutedShare	$ 0.01

[1] Restructuring charges associated with the 2011 initiatives to improve supply chain efficiency, reduce overhead costs, and exit the Russian market were recorded as follows: $1 in the first quarter; $2 ($.01 per diluted share) in the second quarter; and $3 ($.01 per diluted share) in the third quarter. See also Note 6. In addition, acquisition related costs of $3 ($0.01 per share) were recorded in the fourth quarter.

[2] Includes a $41 ($.12 per diluted share) restructuring charge in the fourth quarter related to the 2011 initiatives to improve supply chain efficiency, reduce overhead costs, and exit the Russian market. See also Note 6.