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Divestitures (Narrative) (Details) £ in Millions, $ in Millions	3 Months Ended
	Jan. 26, 2020 USD ($)	Oct. 27, 2019 GBP (£)	Oct. 27, 2019 USD ($)	Jul. 28, 2019 USD ($)	Apr. 28, 2019 USD ($)	Oct. 28, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales			$ 2,183			$ 2,202
Gain (Loss) on Disposition of Business			(64)			0
Campbell Fresh [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operations, Impairment charges						14
Campbell Fresh [Member] \| U.S Refrigerated Soup & Garden Fresh Gourmet [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses					$ 55
Campbell Fresh [Member] \| Bolthouse Farms [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses				$ 500
Campbell Fresh [Member] \| U.S. Refrigerated Soup [Member] \| Property, Plant and Equipment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operations, Impairment charges						14
Kelsen [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses			322
Arnott's and International [Member] \| Forecast [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 2,200
European chips business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses		£ 63	77
Net sales			25			$ 28
Gain (Loss) on Disposition of Business			$ (64)