Multiemployer Contribution Percentage

No definition available.

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Namespace Prefix:	k_
Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Plan year end date for which contributions to pension plan exceeded five percent of total contributions

+ References

No definition available.

+ Details

Name:	k_PlanYearEndDateForContributionsToPlanExceedingFivePercentOfTotalContributions
Namespace Prefix:	k_
Data Type:	us-types:durationStringItemType
Balance Type:	na
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

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

- Definition

Description of whether the employer's contributions represent more than five percent of total contributions to the multiemployer plan for the most recent plan year available. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (e)(2)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

+ Details

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Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Namespace Prefix:
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- Details

Name:	us-gaap_MultiemployerPlanNameAxis=k_Local734PensionPlanMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MultiemployerPlanNameAxis=k_TwinCitiesBakeryDriversPensionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MultiemployerPlanNameAxis=k_UpstateNewYorkBakeryDriversAndIndustryPensionFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Multipemployer Pension and Postretirement Plans Multiemployer Pension Plans Trusts Funds Contributions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Multiemployer Plans [Line Items]
Multiemployer Contribution Percentage	5.00%
Hagerstown Motor Carriers And Teamsters Pension Fund [Member]
Multiemployer Plans [Line Items]
Period contributions above 5%	true
Plan Year End Date For Contributions To Plan Exceeding Five Percent Of Total Contributions	6/30/2016	6/30/2015	6/30/2014
Local 734 Pension Plan [Member]
Multiemployer Plans [Line Items]
Period contributions above 5%	true
Plan Year End Date For Contributions To Plan Exceeding Five Percent Of Total Contributions	4/30/2017	4/30/2016	4/30/2015
Twin Cities Bakery Drivers Pension Plan [Member]
Multiemployer Plans [Line Items]
Period contributions above 5%	true
Plan Year End Date For Contributions To Plan Exceeding Five Percent Of Total Contributions	12/31/2016	12/31/2015	12/31/2014
Upstate New York Bakery Drivers And Industry Pension Fund [Member]
Multiemployer Plans [Line Items]
Period contributions above 5%	true
Plan Year End Date For Contributions To Plan Exceeding Five Percent Of Total Contributions	6/30/2016	6/30/2015	6/30/2014
Project K
Multiemployer Plans [Line Items]
Multiemployer Plans, Withdrawal Obligation	$ 26