Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 28, 2024	Apr. 30, 2023	Apr. 28, 2024	Apr. 30, 2023
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 133	$ 160	$ 570	$ 689
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Foreign currency translation adjustments, before tax	(3)	(2)	(6)	(7)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Unrealized gains (losses) arising during the period, before tax	13	2	(7)	7
Reclassification adjustment for losses (gains) included in net earnings, before Tax	0	(2)	(1)	(8)
Other comprehensive income (loss), before tax	10	(2)	(14)	(8)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]
Foreign currency translation adjustments, tax benefit (expense)	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 benefit (expense)	(2)	(1)	2	(2)
Reclassification adjustment for losses (gains) included in net earnings, tax benefit (expense)	0	1	0	2
Other comprehensive income (loss), tax benefit (expense)	(2)	0	2	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax	(3)	(2)	(6)	(7)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized gains (losses) arising during the period, after-tax	11	1	(5)	5
Reclassification adjustment for losses (gains) included in net earnings, after Tax	0	(1)	(1)	(6)
Other comprehensive income (loss), after-tax	8	(2)	(12)	(8)
Total comprehensive income (loss), after-tax	141	158	558	681
Total comprehensive income (loss) attributable to noncontrolling interests	0	0	0	0
Total comprehensive income (loss) attributable to Campbell Soup Company	$ 141	$ 158	$ 558	$ 681