Fair value portion of asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 350
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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Fair value portion of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit.

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Fair Value Measurements Fair Value Measurements (Assets Measured on Nonrecurring Basis) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jan. 29, 2017	Jul. 31, 2016	Jul. 30, 2017	Jul. 31, 2016
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Impairment Loss			$ 191	$ 106
Campbell Fresh [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Impairment Loss			$ (191)	(106)
Campbell Fresh [Member] \| Bolthouse Farms carrot and carrot ingredients reporting unit [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Impairment Loss	$ 127	$ 106
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	20	35
Campbell Fresh [Member] \| Garden Fresh Gourmet [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Impairment Loss	64
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	1
Fair Value, Measurements, Nonrecurring [Member] \| Campbell Fresh [Member] \| Bolthouse Farms carrot and carrot ingredients reporting unit [Member] \| Fair Value, Inputs, Level 3 [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Fair Value Disclosure	75	202		202
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure	48	$ 68		$ 68
Fair Value, Measurements, Nonrecurring [Member] \| Campbell Fresh [Member] \| Garden Fresh Gourmet [Member] \| Fair Value, Inputs, Level 3 [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill, Fair Value Disclosure	52
Indefinite-lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure	$ 37