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Divestitures (Schedule of Results of Operations of Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	May 02, 2021	Aug. 01, 2021	Aug. 02, 2020	Jul. 28, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax			$ 1,039	$ 32
Earnings (loss) from discontinued operations	$ (6)	$ (6)	1,036	(263)
Campbell Fresh [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales				756
Disposal Group, Including Discontinued Operation, Operating Income (Loss)				(359)
Discontinued Operation, Tax Effect of Discontinued Operation				(78)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax				(32)
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation				19
Earnings (loss) from discontinued operations				(332)
Campbell International [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales			359	1,046
Disposal Group, Including Discontinued Operation, Operating Income (Loss)			53	120
Discontinued Operation, Tax Effect of Discontinued Operation			17	41
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax			1,039	(12)
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation			39	(2)
Earnings (loss) from discontinued operations			1,036	69
Plant And Intangible Assets [Member] \| Campbell Fresh [Member]
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Discontinued Operations, Impairment charges				360
Plant And Intangible Assets [Member] \| Campbell International [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operations, Impairment charges			$ 0	$ 17