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v3.19.3

Restructuring and Cost Reduction Activities - Narrative (Details) | 9 Months Ended
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Sep. 28, 2019
Minimum [Member] |
Restructuring Cost and Reserve [Line Items] |
Restructuring and related activities cash implementation costs recovery time frame | 3 years
Maximum [Member] |
Restructuring Cost and Reserve [Line Items] |
Restructuring and related activities cash implementation costs recovery time frame | 5 years

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- Definition Time frame expected to recover cash implementation costs associated with restructuring and related activities after completion of the program. + References No definition available. + Details
Name: | k_RestructuringAndRelatedActivitiesCashImplementationCostsRecoveryTimeframe
Namespace Prefix: | k_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- 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

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |