Quarterly Data (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
Net sales	$ 1,723	$ 1,962	$ 2,162	$ 2,205	$ 1,519	$ 1,698	$ 1,943	$ 2,015	$ 8,052	$ 7,175	$ 7,143
Gross Profit	623	706	762	821	593	665	750	802
Earnings (loss) from continuing operations	117	169	171	232	126	169	189	250	680	724	749
Earnings (loss) from discontinued operations	(275)	12	19	13	1	8	16	15	(231)	40	53
Net Income (Loss) Attributable to Parent	(158)	181	190	245	127	177	205	265	458	774	805
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 (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 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
Common Stock, Dividends, Per Share, Declared	$ 0.29	$ 0.00	$ 0.58	$ 0.29	$ 0.29	$ 0.29	$ 0.29	$ 0.29	$ 1.16	$ 1.16	$ 1.145
Earnings from continuing operations	$ 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	$ (0.87)	$ 0.04	$ 0.06	$ 0.04	$ 0.00	$ 0.03	$ 0.05	$ 0.05	$ (0.73)	$ 0.12	$ 0.16
Net earnings attributable to Campbell Soup Company	$ (0.50)	$ 0.57	$ 0.60	$ 0.78	$ 0.40	$ 0.55	$ 0.64	$ 0.82	$ 1.44	$ 2.41	$ 2.42
Market Price Per Share High	$ 48.83	$ 46.85	$ 37.16	$ 36.28	$ 34.58	$ 34.04	$ 34.12	$ 34.00
Market Price Per Share Low	$ 42.32	$ 36.09	$ 34.30	$ 32.24	$ 31.32	$ 31.25	$ 31.22	$ 29.69
Restructuring charges, after tax	19	14	30	27	0	2	1	1
Business Combination Acquisition Related Costs After Tax				7	3	0	0	0
Restructuring charges per diluted share	$ 0.06	$ 0.04	$ 0.09	$ 0.09	$ 0.00	$ 0.01	$ 0.00	$ 0.00
Business Combination Acquisition Related Costs Per Diluted Share				$ 0.02	$ 0.01	$ 0.00	$ 0.00	$ 0.00
Deferred Tax Liabilities, Parent's Basis in Discontinued Operation		0	0	0
Segment, Discontinued Operations [Member]
Restructuring charges, after tax					0	1	1	0
Impairment Of Long Lived Assets To Be Disposed Of, Net Of Tax	263	0	0	0
Deferred Tax Liabilities, Parent's Basis in Discontinued Operation	$ 18								$ 18
Impairment Of Goodwill And Indefinite Lived Intangible Assets, Per Share Diluted	$ 0.83
Deferred Tax Liabilities, Parent's Basis in Discontinued Operation, Per Share Diluted	$ 0.06