Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 27, 2013	Jan. 29, 2012
Statement of Other Comprehensive Income [Abstract]
Net earnings	$ 187	$ 201	$ 430	$ 464
Other comprehensive income (loss), before tax
Foreign currency translation adjustments, before tax	26	(39)	38	(80)
Cash-flow hedges, before tax [Abstract]
Unrealized gains (losses) arising during period, before tax	4	(2)	4	4
Reclassification adjustment included in net earnings, before tax	1	5	1	8
Pension and other postretirement benefits, before tax, [Abstract]
Net actuarial gain (loss) arising during the period, before tax		1		7
Reclassification of prior service credit included in net earnings, before tax	(2)	(1)	(2)	(1)
Reclassification of net actuarial loss included in net earnings, before tax	32	21	62	41
Other comprehensive income (loss), before tax	61	(15)	103	(21)
Other comprehensive income (loss), tax (expense) or benefit
Foreign currency translation adjustments, tax (expense) or benefit	(4)	3	(4)	(17)
Cash-flow hedges, tax effect
Unrealized gains (losses) arising during period, tax (expense) or benefit	(2)	1	(2)	(1)
Reclassification adjustment included in net earnings, tax (expense) or benefit		(1)		(2)
Pension and other postretirement liability adjustments, tax effect
Net actuarial gain (loss) arising during the period, tax (expense) or benefit				(2)
Reclassification of net actuarial loss included in net earnings, tax (expense) or benefit	(10)	(7)	(21)	(15)
Other comprehensive income (loss), tax (expense) or benefit	(16)	(4)	(27)	(37)
Other comprehensive income (loss), after-tax
Foreign currency translation adjustments, after-tax	22	(36)	34	(97)
Cash-flow hedges, after-tax[Abstract]
Unrealized gains (losses) arising during period, after-tax	2	(1)	2	3
Reclassification adjustment included in net earnings, after-tax	1	4	1	6
Pension and other postretirement liability adjustments, after-tax [Abstract]
Net actuarial gain (loss) arising during the period, after-tax		1		5
Reclassification of prior service credit included in net earnings, after tax	(2)	(1)	(2)	(1)
Reclassification of net actuarial loss included in net earnings, after-tax	22	14	41	26
Other comprehensive income (loss), after tax	45	(19)	76	(58)
Total comprehensive income (loss), after-tax	232	182	506	406
Total comprehensive income (loss), attributable to noncontrolling interests	(3)	(4)	(5)	(6)
Total comprehensive income (loss) attributable to Campbell Soup Company	$ 235	$ 186	$ 511	$ 412