Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Millions				3 Months Ended			9 Months Ended
		Mar. 26, 2018	Dec. 12, 2017	Apr. 29, 2018	Jan. 28, 2018	Apr. 30, 2017	Apr. 29, 2018	Apr. 30, 2017	Jul. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	[1]			$ 4,608			$ 4,608		$ 2,115
Goodwill, Impairment Loss							540
Amortization of Intangible Assets				10		$ 5	18	$ 15
Finite-Lived Intangible Assets, Amortization Expense, Current Year				34			34
Finite-Lived Intangible Assets, Amortization Expense, Year Two				65			65
Finite Lived Intangible Assets, Amortization Expense, Year Three				60			60
Finite Lived Intangible Assets, Amortization Expense, Year Four				59			59
Finite Lived Intangible Assets, Amortization Expense, Year Five				59			$ 59
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life							5 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life							20 years
Deli Reporting Unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss				81
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure				23			$ 23
Bolthouse Farms refrigerated beverages and salad dressing reporting unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss				384
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure				150			150
Campbell Fresh [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	[1]			0			0		$ 540
Goodwill, Impairment Loss							540
Campbell Fresh [Member] | Deli Reporting Unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss				81
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)				13
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure				23			23
Campbell Fresh [Member] | Bolthouse Farms refrigerated beverages and salad dressing reporting unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss				384
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)				130
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure				$ 150			$ 150
Campbell Fresh [Member] | Bolthouse Farms carrot and carrot ingredients reporting unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss					$ 75			$ 212
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure					$ 48
Snyder's-Lance [Member]
Finite-Lived Intangible Assets [Line Items]
Payments To Acquire Business		$ 6,112
Goodwill		$ 2,867
Pacific Foods [Member]
Finite-Lived Intangible Assets [Line Items]
Payments To Acquire Business			$ 689
Goodwill			$ 202

[1] The Campbell Fresh segment includes accumulated impairment charges of $837 as of April 29, 2018, and $297 as of July 30, 2017 related to the Bolthouse Farms carrot and carrot ingredients reporting unit, the deli reporting unit, and the Bolthouse Farms refrigerated beverages and salad dressings reporting unit.