Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 28, 2024	Jan. 29, 2023	Jan. 28, 2024	Jan. 29, 2023
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 203	$ 232	$ 437	$ 529
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Foreign currency translation adjustments, before tax	6	3	(3)	(5)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Unrealized gains (losses) arising during the period, before tax	(28)	(2)	(20)	5
Reclassification adjustment for losses (gains) included in net earnings, before Tax	(1)	(2)	(1)	(6)
Other comprehensive income (loss), before tax	(23)	(1)	(24)	(6)
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)	6	1	4	(1)
Reclassification adjustment for losses (gains) included in net earnings, tax benefit (expense)	0	0	0	1
Other comprehensive income (loss), tax benefit (expense)	6	1	4	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax	6	3	(3)	(5)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized gains (losses) arising during the period, after-tax	(22)	(1)	(16)	4
Reclassification adjustment for losses (gains) included in net earnings, after Tax	(1)	(2)	(1)	(5)
Other comprehensive income (loss), after-tax	(17)	0	(20)	(6)
Total comprehensive income (loss), after-tax	186	232	417	523
Total comprehensive income (loss) attributable to noncontrolling interests	0	0	0	0
Total comprehensive income (loss) attributable to Campbell Soup Company	$ 186	$ 232	$ 417	$ 523