Divestitures (Narrative) (Details) £ in Millions, $ in Millions				3 Months Ended
		Dec. 23, 2019 USD ($)	Sep. 23, 2019 USD ($)	Nov. 01, 2020 USD ($)	Apr. 26, 2020 USD ($)	Oct. 27, 2019 USD ($)	Oct. 27, 2019 GBP (£)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales				$ 2,340		$ 2,183
Loss on sale of businesses				0		104
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]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses		$ 2,286			$ 4
European chips business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses						77	£ 63
Net sales						25
Loss on sale of businesses	[1]			$ 0		$ 64

[1] See Note 3 for additional information.