Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Millions				3 Months Ended					12 Months Ended
		Mar. 26, 2018	Dec. 12, 2017	Jul. 29, 2018	Apr. 29, 2018	Jan. 28, 2018	Jan. 29, 2017	Jul. 31, 2016	Jul. 29, 2018	Jul. 30, 2017	Jul. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Goodwill				$ 4,580				$ 2,263	$ 4,580	$ 2,115	$ 2,263
Goodwill, Impairment Loss									540	191
Amortization of Intangible Assets									34	19	20
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months				65					65
Finite-Lived Intangible Assets, Amortization Expense, Year Two				60					60
Finite Lived Intangible Assets, Amortization Expense, Year Three				59					59
Finite Lived Intangible Assets, Amortization Expense, Year Four				59					59
Finite Lived Intangible Assets, Amortization Expense, Year Five				59					59
Bolthouse Farms carrot and carrot ingredients reporting unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss						$ 75	$ 127	106
Goodwill, Fair Value Disclosure						0	75	202			202
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)							20	35
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure							48	68			68
Garden Fresh Gourmet reporting unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss							64
Goodwill, Fair Value Disclosure							52
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)							1
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure							37
Bolthouse Farms refrigerated beverages and salad dressing [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss					$ 384
Goodwill, Fair Value Disclosure					0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)					130
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure					150
Deli Reporting Unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss					81
Goodwill, Fair Value Disclosure					0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)					13
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure					23
Plum [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)				54
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure				61					61
Campbell Fresh [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	[1]			0				731	0	540	$ 731
Goodwill, Impairment Loss									540	$ 191
Campbell Fresh [Member] | Bolthouse Farms carrot and carrot ingredients reporting unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss						$ 75	127	106
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)							20	$ 35
Campbell Fresh [Member] | Bolthouse Farms carrot and carrot ingredients reporting unit [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Fair Value Disclosure							75
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure				$ 48					$ 48
Campbell Fresh [Member] | Garden Fresh Gourmet reporting unit [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Impairment Loss							64
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)							1
Campbell Fresh [Member] | Garden Fresh Gourmet reporting unit [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, Fair Value Disclosure							$ 52
Campbell Fresh [Member] | Bolthouse Farms refrigerated beverages and salad dressing [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), Fair Value Disclosure					150
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), Fair Value Disclosure					$ 23
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									2 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									22 years
Snyder's-Lance [Member]
Finite-Lived Intangible Assets [Line Items]
Payments to Acquire Businesses, Gross		$ 6,112
Goodwill		$ 2,866
Pacific Foods [Member]
Finite-Lived Intangible Assets [Line Items]
Payments to Acquire Businesses, Gross			$ 688
Goodwill			$ 202

[1] The balance of goodwill is reflected net of accumulated impairment charges of $837 as of July 29, 2018, $297 as of July 30, 2017 and $106 as of July 31, 2016, respectively, 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.