Fair Value Measurements Fair Value Measurements (Assets measured on non-recurring basis) (Details) $ in Millions	3 Months Ended	9 Months Ended
	Apr. 29, 2018 USD ($)	Apr. 29, 2018 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, Impairment Loss		$ 540
Deli Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Tangible Asset Impairment Charges	$ 11
Impairment of Intangible Assets, Finite-lived	13
Goodwill, Impairment Loss	81
Property, Plant, and Equipment, Fair Value Disclosure	53	53
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure	23	23
Goodwill, Fair Value Disclosure	0	0
Bolthouse Farms refrigerated beverages and salad dressing reporting unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Intangible Assets, Finite-lived	130
Goodwill, Impairment Loss	384
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure	150	150
Goodwill, Fair Value Disclosure	0	0
Campbell Fresh [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, Impairment Loss		540
Campbell Fresh [Member] | Deli Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, Impairment Loss	81
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure	23	23
Campbell Fresh [Member] | Bolthouse Farms refrigerated beverages and salad dressing reporting unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill, Impairment Loss	384
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure	$ 150	$ 150