Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 26, 2025	Jan. 28, 2024	Jan. 26, 2025	Jan. 28, 2024
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 173	$ 203	$ 391	$ 437
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax [Abstract]
Foreign currency translation adjustments, before tax	(5)	6	(7)	(3)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract]
Unrealized gains (losses) arising during the period, before tax	3	(28)	3	(20)
Reclassification adjustment for losses (gains) included in net earnings, before Tax	(1)	(1)	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	0	0	0	0
Other comprehensive income (loss), before tax	(3)	(23)	3	(24)
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	6	0	4
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	0	0	0	0
Other comprehensive income (loss), tax benefit (expense)	0	6	(2)	4
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax [Abstract]
Foreign currency translation adjustments, after-tax	(5)	6	(7)	(3)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized gains (losses) arising during the period, after-tax	3	(22)	3	(16)
Reclassification adjustment for losses (gains) included in net earnings, after Tax	(1)	(1)	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	(3)	(17)	1	(20)
Total comprehensive income (loss), after-tax	170	186	392	417
Total comprehensive income (loss) attributable to noncontrolling interests	0	0	0	0
Total comprehensive income (loss) attributable to The Campbell's Company	$ 170	$ 186	$ 392	$ 417