Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Oct. 30, 2022	Oct. 31, 2021
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 297	$ 261
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Foreign currency translation adjustments, before tax	(8)	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Unrealized gains (losses) arising during the period, before tax	7	3
Reclassification adjustment for losses (gains) included in net earnings, before Tax	(4)	0
Other comprehensive income (loss), before tax	(5)	3
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax [Abstract]
Foreign currency translation adjustments, tax (expense) benefit	0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax [Abstract]
Unrealized gains (losses) arising during the period, tax	(2)	(1)
Reclassification adjustment for losses (gains) included in net earnings, tax (expense) benefit	1	0
Other comprehensive income (loss), tax (expense) benefit	(1)	(1)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax	(8)	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized gains (losses) arising during the period, after-tax	5	2
Reclassification adjustment for losses (gains) included in net earnings, after Tax	(3)	0
Other comprehensive income (loss), after-tax	(6)	2
Total comprehensive income (loss), after-tax	291	263
Total comprehensive income (loss) attributable to noncontrolling interests	0	0
Total comprehensive income (loss) attributable to Campbell Soup Company	$ 291	$ 263