Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 01, 2022	May 02, 2021	May 01, 2022	May 02, 2021
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 188	$ 160	$ 661	$ 714
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Foreign currency translation adjustments, before tax	(2)	7	(6)	14
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Unrealized gains (losses) arising during the period, before tax	9	(2)	17	(9)
Reclassification adjustment for losses (gains) included in net earnings, before Tax	(4)	2	(4)	5
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract]
Reclassification of prior service credit included in net earnings, before tax	0	(2)	(1)	(4)
Other comprehensive income (loss), before tax	3	5	6	6
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]
Foreign currency translation adjustments, tax (expense) benefit	0	0	0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax [Abstract]
Unrealized gains (losses) arising during the period, tax	(2)	0	(4)	1
Reclassification adjustment for losses (gains) included in net earnings, tax (expense) benefit	1	0	1	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax [Abstract]
Reclassification of prior service credit included in net earnings, tax (expense) benefit	0	1	0	1
Other comprehensive income (loss), tax (expense) benefit	(1)	1	(3)	2
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax	(2)	7	(6)	14
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized gains (loss) arising during the period, after-tax	7	(2)	13	(8)
Reclassification adjustment for losses (gains) included in net earnings, after Tax	(3)	2	(3)	5
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Reclassification of prior service credit included in net earnings, after-tax	0	(1)	(1)	(3)
Other comprehensive income (loss), after-tax	2	6	3	8
Total comprehensive income (loss), after-tax	190	166	664	722
Total comprehensive income (loss) attributable to noncontrolling interests	0	(1)	0	(4)
Total comprehensive income (loss) attributable to Campbell Soup Company	$ 190	$ 167	$ 664	$ 726