Basis of Presentation and Significant Accounting Polices (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Nov. 01, 2015	Nov. 02, 2014	Aug. 02, 2015	Aug. 04, 2014
Cost of products sold	$ 1,448	$ 1,460
Marketing and selling expenses	226	243
Administrative expenses	156	131
Research and development expenses	32	28
Earnings before interest and taxes	315	389
Earnings before taxes	287	364
Taxes on earnings	93	116
Net earnings	194	248
Net earnings attributable to Campbell Soup	$ 194	$ 248
Earnings Per Share, Basic	$ 0.63	$ 0.79
Earnings Per Share, Diluted	$ 0.62	$ 0.78
Foreign currency translation adjustments, before tax	$ (26)	$ (81)
Net actuarial gain (loss) arising during the period, before tax	0	0
Reclassification of net actuarial loss included in net earnings	0	0
Tax benefit/(expense)	0	0
Inventories	1,049		$ 995
Other current assets	196		198
Accrued income taxes	123		29
Earnings retained in the business	1,850		1,754
Accumulated other comprehensive loss	(200)		(168)
Pension and postretirement benefit expense/(income)	133	(6)
Deferred income taxes	(35)	9
Other, net	(1)	1
Inventories	(56)	(95)
Accounts payable and accrued liabilities	72	132
Net cash provided by operating activities	218	188
Prior accounting principles [Member]
Cost of products sold	1,412
Marketing and selling expenses	216
Administrative expenses	149
Research and development expenses	29
Earnings before interest and taxes	371
Earnings before taxes	343
Taxes on earnings	110
Net earnings	233
Net earnings attributable to Campbell Soup	$ 233
Earnings Per Share, Basic	$ 0.75
Earnings Per Share, Diluted	$ 0.75
Foreign currency translation adjustments, before tax	$ (26)
Net actuarial gain (loss) arising during the period, before tax	(136)
Reclassification of net actuarial loss included in net earnings	(77)
Tax benefit/(expense)	22
Inventories	1,044
Other current assets	198
Accrued income taxes	119
Earnings retained in the business	2,629
Accumulated other comprehensive loss	(978)
Pension and postretirement benefit expense/(income)	0
Deferred income taxes	(14)
Other, net	73
Inventories	(53)
Accounts payable and accrued liabilities	68
Net cash provided by operating activities	218
Previously reported [Member]
Cost of products sold		1,472
Marketing and selling expenses		247
Administrative expenses		135
Research and development expenses		29
Earnings before interest and taxes		368
Earnings before taxes		343
Taxes on earnings		109
Net earnings		234
Net earnings attributable to Campbell Soup		$ 234
Earnings Per Share, Basic		$ 0.75
Earnings Per Share, Diluted		$ 0.74
Foreign currency translation adjustments, before tax		$ (83)
Net actuarial gain (loss) arising during the period, before tax		4
Reclassification of net actuarial loss included in net earnings		(24)
Tax benefit/(expense)		(10)
Inventories			993
Other current assets			199
Accrued income taxes			29
Earnings retained in the business			2,494
Accumulated other comprehensive loss			(909)
Pension and postretirement benefit expense/(income)		0
Deferred income taxes		2
Other, net		19
Inventories		(98)
Accounts payable and accrued liabilities		132
Net cash provided by operating activities		188
Restatement adjustment [Member]
Cost of products sold	36	(12)
Marketing and selling expenses	10	(4)
Administrative expenses	7	(4)
Research and development expenses	3	(1)
Earnings before interest and taxes	(56)	21
Earnings before taxes	(56)	21
Taxes on earnings	(17)	7
Net earnings	(39)	14
Net earnings attributable to Campbell Soup	$ (39)	$ 14
Earnings Per Share, Basic	$ (0.13)	$ 0.04
Earnings Per Share, Diluted	$ (0.13)	$ 0.04
Foreign currency translation adjustments, before tax	$ 0	$ 2
Net actuarial gain (loss) arising during the period, before tax	136	(4)
Reclassification of net actuarial loss included in net earnings	77	24
Tax benefit/(expense)	(22)	10
Inventories	5		2	$ (2)
Other current assets	(2)		(1)	1
Accrued income taxes	4		0
Earnings retained in the business	(779)		(740)	(715)
Accumulated other comprehensive loss	778		$ 741	$ 714
Pension and postretirement benefit expense/(income)	133	(6)
Deferred income taxes	(21)	7
Other, net	(74)	(18)
Inventories	(3)	3
Accounts payable and accrued liabilities	4	0
Net cash provided by operating activities	$ 0	$ 0