Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Oct. 28, 2012	Oct. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net earnings	$ 243	$ 263
Other comprehensive income (loss), before tax
Foreign currency translation adjustments, before tax	12	(41)
Cash-flow hedges, before tax [Abstract]
Unrealized gains (losses) arising during period, before tax	0	6
Reclassification adjustment included in net earnings, before tax	0	3
Pension and other postretirement benefits, before tax, [Abstract]
Net actuarial gain (loss) arising during the period, before tax	0	6
Reclassification of net actuarial loss included in net earnings, before tax	30	20
Other comprehensive income (loss), before tax	42	(6)
Other comprehensive income (loss), tax (expense) or benefit
Foreign currency translation adjustments, tax (expense) or benefit	0	(20)
Cash-flow hedges, tax effect
Unrealized gains (losses) arising during period, tax (expense) or benefit	0	(2)
Reclassification adjustment included in net earnings, tax (expense) or benefit	0	(1)
Pension and other postretirement liability adjustments, tax effect
Net actuarial gain (loss) arising during the period, tax (expense) or benefit	0	(2)
Reclassification of net actuarial loss included in net earnings, tax (expense) or benefit	(11)	(8)
Other comprehensive income (loss), tax	(11)	(33)
Other comprehensive income (loss), after-tax
Foreign currency translation adjustments, after-tax	12	(61)
Cash-flow hedges, after-tax[Abstract]
Unrealized gains (losses) arising during period, after-tax	0	4
Reclassification adjustment included in net earnings, after-tax	0	2
Pension and other postretirement liability adjustments, after-tax [Abstract]
Net actuarial gain (loss) arising during the period, after-tax	0	4
Reclassification of net actuarial loss included in net earnings, after-tax	19	12
Other comprehensive income (loss)	31	(39)
Total comprehensive income (loss), after-tax	274	224
Comprehensive income (loss), net of tax, attributable to noncontrolling interests	(2)	(2)
Comprehensive income (loss), net of tax, attributable to Campbell Soup Company	$ 276	$ 226