Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Aug. 02, 2015	Aug. 03, 2014	Jul. 28, 2013
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Foreign currency translation adjustments, before tax		$ (324)	$ (12)	$ (95)
Reclassification of currency translation adjustments realized upon disposal of business, before tax		0	(22)	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax [Abstract]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax		(5)	(12)	20
Reclassification adjustment for (gains) losses included in net earnings, before tax		(1)	0	4
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, [Abstract]
Net actuarial gain (loss) arising during the period, before tax		(124)	(55)	322
Reclassification of prior service credit included in net earnings, before tax	[1]	(2)	(2)	(2)
Reclassification of net actuarial loss included in net earnings before tax	[1]	98	113	124
Other comprehensive income (loss), before tax		(358)	10	373
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]
Foreign currency translation adjustments, tax (expense) benefit		1	(1)	3
Reclassification of currency translation adjustments realized upon disposal of business, tax (expense) benefit		0	3	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect [Abstract]
Unrealized gains (losses) arising during the period, tax (expense) benefit		3	4	(8)
Reclassification adjustment for (gains) losses included in net earnings, tax (expense) benefit		1	0	(1)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax [Abstract]
Net actuarial gain (loss) arising during the period, tax (expense) benefit		47	20	(103)
Reclassification of prior service credit included in net earnings, tax (expense) benefit		0	0	0
Reclassification of net actuarial loss included in net earnings, tax (expense) benefit		(35)	(39)	(54)
Other comprehensive income (loss), tax (expense) benefit		17	(13)	(163)
Other comprehensive income (loss), after-tax [Abstract]
Net earnings		691	807	449
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax		(323)	(13)	(92)
Reclassification of currency translation adjustments realized upon disposal of business, after-tax		0	(19)	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Unrealized gains (losses) arising during the period, after-tax		(2)	(8)	12
Reclassification adjustment for (gains) losses included in net earnings, after-tax		0	0	3
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Net actuarial gain (loss) arising during the period, after-tax		(77)	(35)	219
Reclassification of prior service credit included in net earnings, after-tax		(2)	(2)	(2)
Reclassification of net actuarial loss included in net earnings, after-tax		63	74	70
Other comprehensive income (loss), after tax		(341)	(3)	210
Total comprehensive income (loss), after-tax		350	804	659
Total comprehensive income (loss) attributable to noncontrolling interests		(1)	(10)	(10)
Total comprehensive income (loss) attributable to Campbell Soup Company		$ 351	$ 814	$ 669

[1] In 2014, net actuarial losses of $2 were recognized in Earnings (loss) from discontinued operations as a result of the sale of the European simple meals business. Excluding the net actuarial losses related to the sale of the business in 2014, these items are included in the components of net periodic benefit costs (see Note 11 for additional details).