Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Oct. 27, 2024	Oct. 29, 2023
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 218	$ 234
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Foreign currency translation adjustments, before tax	(2)	(9)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Unrealized gains (losses) arising during the period, before tax	0	8
Reclassification adjustment for losses (gains) included in net earnings, before Tax	1	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract]
Prior service credit arising during the period, before tax	7	0
Reclassification of prior service credit included in net earnings, before tax	0	0
Other comprehensive income (loss), before tax	6	(1)
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)	0	(2)
Reclassification adjustment for losses (gains) included in net earnings, tax benefit (expense)	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax [Abstract]
Prior service credit arising during the period, tax (expense) benefit	(2)	0
Reclassification of prior service credit included in net earnings, tax (expense) benefit	0	0
Other comprehensive income (loss), tax benefit (expense)	(2)	(2)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax	(2)	(9)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized gains (losses) arising during the period, after-tax	0	6
Reclassification adjustment for losses (gains) included in net earnings, after Tax	1	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Prior service credit arising during the period, after tax	5	0
Reclassification of prior service credit included in net earnings, after-tax	0	0
Other comprehensive income (loss), after-tax	4	(3)
Total comprehensive income (loss), after-tax	222	231
Total comprehensive income (loss) attributable to noncontrolling interests	0	0
Total comprehensive income (loss) attributable to The Campbell's Company	$ 222	$ 231