Name:	k_MaximumFutureValueOfPerformanceShares
Namespace Prefix:	k_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Time period for cumulative operating cash flow and total share holder return of the Company's common stock relative to a select group of peer companies under the share based payment performance award conditions.

No definition available.

Name:	k_PerformanceAwardConditionTimePeriod
Namespace Prefix:	k_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Performance award settlement as a percentage of the target.

No definition available.

Name:	k_PerformanceAwardSettlementStockIssuedAsPercentageOfOriginalTarget
Namespace Prefix:	k_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Performance Share Target Grant

No definition available.

Name:	k_PerformanceShareTargetGrant
Namespace Prefix:	k_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Description of award terms as to the maximum number of shares that could actually be delivered under an award upon satisfaction of a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale, expressed as a percentage of the shares under the award.

No definition available.

Name:	k_PerformanceSharesIssuedOnVestingDateMaximum
Namespace Prefix:	k_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Description of award terms as to the minimum number of shares that could actually be delivered under an award upon satisfaction of a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale, expressed as a percentage of the shares under the award.

No definition available.

Name:	k_PerformanceSharesIssuedOnVestingDateMinimum
Namespace Prefix:	k_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Cumulative time period for peformance based share awards targets.

No definition available.

Name:	k_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceTargetTimePeriod
Namespace Prefix:	k_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

Amount of cash paid related to share-based compensation liabilities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

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.

No definition available.

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

Name:	us-gaap_AwardDateAxis=k_A2016AwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AwardDateAxis=k_A2015AwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AwardDateAxis=k_A2014AwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AwardTypeAxis=k_PerformanceSharesTargetGrantTwentySixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AwardTypeAxis=k_PerformanceSharesTargetGrantTwentyFifteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: