Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 27, 2025	Apr. 28, 2024	Apr. 27, 2025	Apr. 28, 2024
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 66	$ 133	$ 457	$ 570
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Foreign currency translation adjustments, before tax	6	(3)	(1)	(6)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Unrealized gains (losses) arising during the period, before tax	(5)	13	(2)	(7)
Reclassification adjustment for losses (gains) included in net earnings, before Tax	0	0	0	(1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract]
Prior service credit arising during the period, before tax	0	0	7	0
Reclassification of prior service credit included in net earnings, before tax	(1)	0	(1)	0
Other comprehensive income (loss), before tax	0	10	3	(14)
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)	0	(2)	0	2
Reclassification adjustment for losses (gains) included in net earnings, tax benefit (expense)	0	0	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax [Abstract]
Prior service credit arising during the period, tax (expense) benefit	0	0	(2)	0
Reclassification of prior service credit included in net earnings, tax (expense) benefit	1	0	1	0
Other comprehensive income (loss), tax benefit (expense)	1	(2)	(1)	2
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax	6	(3)	(1)	(6)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized gains (losses) arising during the period, after-tax	(5)	11	(2)	(5)
Reclassification adjustment for losses (gains) included in net earnings, after Tax	0	0	0	(1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Prior service credit arising during the period, after tax	0	0	5	0
Reclassification of prior service credit included in net earnings, after-tax	0	0	0	0
Other comprehensive income (loss), after-tax	1	8	2	(12)
Total comprehensive income (loss), after-tax	67	141	459	558
Total comprehensive income (loss) attributable to noncontrolling interests	0	0	0	0
Total comprehensive income (loss) attributable to The Campbell's Company	$ 67	$ 141	$ 459	$ 558