Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	May 03, 2015		Apr. 27, 2014		May 03, 2015		Apr. 27, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 182		$ 183		$ 623		$ 672
Other comprehensive income (loss), before tax [Abstract]
Foreign currency translation adjustments, before tax	12		68		(238)		(1)
Reclassification of currency translation adjustments realized upon disposal of business, before tax					0		(22)
Cash-flow hedges, before tax [Abstract]
Unrealized gains (losses) arising during the period, before tax	12		(5)		(21)		(4)
Reclassification adjustment for (gains) losses included in net earnings, before tax	(1)		1		0		1
Pension and other postretirement benefits, before tax, [Abstract]
Net actuarial gain (loss) arising during the period, before tax	(4)		(1)		13		7
Reclassification of prior service credit included in net earnings before tax	(1)	[1]	(1)	[1]	(2)	[1]	(2)	[1]
Reclassification of net actuarial loss included in net earnings before tax	24	[1]	40	[1]	72	[1]	87	[1]
Other comprehensive income (loss), before tax	42		102		(176)		66
Other comprehensive income (loss), tax (expense) benefit [Abstract]
Foreign currency translation adjustments, tax (expense) benefit	0		0		1		(1)
Reclassification of currency translation adjustments realized upon disposal of business, tax (expense) benefit					0		3
Cash-flow hedges, tax effect [Abstract]
Unrealized gains (losses) arising during the period, tax (expense) benefit	(5)		2		8		2
Reclassification adjustment for (gains) losses included in net earnings, tax (expense) benefit	0		0		0		0
Pension and other postretirement liability adjustments, tax effect [Abstract]
Net actuarial gain (loss) arising during the period, tax (expense) benefit	2		0		(4)		(2)
Reclassification of prior service credit included in net earnings tax (expense) benefit	0		0		0		0
Reclassification of net actuarial loss included in net earnings, tax (expense) benefit	(9)		(14)		(25)		(30)
Other comprehensive income (loss), tax (expense) benefit	(12)		(12)		(20)		(28)
Other comprehensive income (loss), after-tax [Abstract]
Foreign currency translation adjustments, after-tax	12		68		(237)		(2)
Reclassification of currency translation adjustments realized upon disposal of business, after-tax					0		(19)
Cash-flow hedges, after-tax[Abstract]
Unrealized gains (losses) arising during the period, after-tax	7		(3)		(13)		(2)
Reclassification adjustment for (gains) losses included in net earnings, after-tax	(1)		1		0		1
Pension and other postretirement liability adjustments, after-tax [Abstract]
Net actuarial gain (loss) arising during the period, after-tax	(2)		(1)		9		5
Reclassification of prior service credit included in net earnings, after-tax	(1)		(1)		(2)		(2)
Reclassification of net actuarial loss included in net earnings, after-tax	15		26		47		57
Other comprehensive income (loss), after tax	30		90		(196)		38
Total comprehensive income (loss), after-tax	212		273		427		710
Total comprehensive income (loss) attributable to noncontrolling interests	0		0		0		(9)
Total comprehensive income (loss) attributable to Campbell Soup Company	$ 212		$ 273		$ 427		$ 719

[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).