Restructuring charges and related costs, after tax

No definition available.

Name:	cpb_RestructuringChargesAndRelatedCostsAfterTax
Namespace Prefix:	cpb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Restructuring Charges Per Diluted Share

+ References

No definition available.

+ Details

Name:	cpb_RestructuringChargesPerDilutedShare
Namespace Prefix:	cpb_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Expected cost to be incurred by segment.

+ References

No definition available.

+ Details

Name:	cpb_RestructuringandRelatedCostExpectedCostAllocation
Namespace Prefix:	cpb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount expected to be recognized in earnings for the specified restructuring cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

+ Details

Name:	us-gaap_RestructuringAndRelatedCostExpectedCost1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The expected number of positions to be eliminated as a result of restructuring activities.

+ References

No definition available.

+ Details

Name:	us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

+ References

+ Details

Name:	us-gaap_RestructuringAndRelatedCostIncurredCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

+ Details

Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RestructuringPlanAxis=cpb_TwoThousandFifteenInitiativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=us-gaap_EmployeeSeveranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=cpb_OtherNoncashBenefitCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cpb_AmericasSimpleMealsandBeveragesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cpb_GlobalBiscuitsandSnacksMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cpb_CampbellFreshMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=cpb_ImplementationandOtherRelatedCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringPlanAxis=cpb_TwoThousandFourteenInitiativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Restructuring Charges and Cost Savings Initiatives (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended		27 Months Ended
	Apr. 30, 2017 USD ($) $ / shares	May 01, 2016 USD ($) $ / shares	Apr. 30, 2017 USD ($) $ / shares	May 01, 2016 USD ($) $ / shares	Jul. 31, 2016 USD ($) $ / shares	Aug. 02, 2015 USD ($) $ / shares	Jul. 28, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 2	$ 0	$ 32
Payments to Acquire Property, Plant, and Equipment			195	225
2015 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	2	0	35	$ 35	$ 102
Restructuring and Related Cost, Incurred Cost	7	15	18	70	82	124
Restructuring charges and related costs, after tax	$ 4	$ 9	$ 11	$ 44	$ 52	$ 78
Restructuring charges per diluted share \| $ / shares	$ 0.01	$ 0.03	$ 0.04	$ 0.14	$ 0.17	$ 0.25
Payments to Acquire Property, Plant, and Equipment			$ 1
2015 Initiatives [Member] \| Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			0
Restructuring and Related Cost, Expected Cost	$ 130		$ 130
2015 Initiatives [Member] \| Other Non-cash Benefit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost						$ 7
2015 Initiatives [Member] \| UNITED STATES
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated			471
2015 Initiatives [Member] \| Americas Simple Meals and Beverages [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	33.00%		33.00%
Restructuring and Related Cost, Incurred Cost	$ 1		$ 1
2015 Initiatives [Member] \| Global Biscuits and Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	32.00%		32.00%
Restructuring and Related Cost, Incurred Cost	$ 2		$ 4
2015 Initiatives [Member] \| Campbell Fresh [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	3.00%		3.00%
Restructuring and Related Cost, Incurred Cost	$ 0		$ 0
2015 Initiatives [Member] \| Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Allocation	32.00%		32.00%
Restructuring and Related Cost, Incurred Cost	$ 4		$ 13
2015 Initiatives [Member] \| Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	250		250
2015 Initiatives [Member] \| Minimum [Member] \| Implementation and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	120		120
2015 Initiatives [Member] \| Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	270		270
2015 Initiatives [Member] \| Maximum [Member] \| Implementation and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 140		$ 140
2014 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ (3)	$ (4)
Restructuring charges and related costs, after tax				$ (2)	$ (3)
Restructuring charges per diluted share \| $ / shares				$ 0.01	$ 0.01
2014 Initiatives [Member] \| Severance Pay And Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					$ (4)
Scenario, Forecast [Member] \| 2015 Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Payments to Acquire Property, Plant, and Equipment							$ 105