Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Oct. 29, 2023	Oct. 30, 2022
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 234	$ 297
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Foreign currency translation adjustments, before tax	(9)	(8)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Unrealized gains (losses) arising during the period, before tax	8	7
Reclassification adjustment for losses (gains) included in net earnings, before Tax	0	(4)
Other comprehensive income (loss), before tax	(1)	(5)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]
Foreign currency translation adjustments, tax benefit (expense)	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)	(2)
Reclassification adjustment for losses (gains) included in net earnings, tax benefit (expense)	0	1
Other comprehensive income (loss), tax benefit (expense)	(2)	(1)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax	(9)	(8)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized gains (losses) arising during the period, after-tax	6	5
Reclassification adjustment for losses (gains) included in net earnings, after Tax	0	(3)
Other comprehensive income (loss), after-tax	(3)	(6)
Total comprehensive income (loss), after-tax	231	291
Total comprehensive income (loss) attributable to noncontrolling interests	0	0
Total comprehensive income (loss) attributable to Campbell Soup Company	$ 231	$ 291