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v3.20.4

Multipemployer Pension and Postretirement Plans Narrative (Details) | 12 Months Ended
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Jan. 02, 2021
Minimum |
Multiemployer Plans [Line Items] |
Red Zone Multiemployer Plans Funded Percentage | 0.00%
Yellow Zone Multiemployer Plans Funded Percentage | 65.00%
Green Zone Multiemployer Plan Funded Percentage | 80.00%
Maximum |
Multiemployer Plans [Line Items] |
Red Zone Multiemployer Plans Funded Percentage | 65.00%
Yellow Zone Multiemployer Plans Funded Percentage | 80.00%
Green Zone Multiemployer Plan Funded Percentage | 100.00%

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- Definition Green zone multiemployer plan funded percentage. + References No definition available. + Details
Name: | k_GreenZoneMultiemployerPlanFundedPercentage
Namespace Prefix: | k_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Red zone multiemployer plans funded percentage. + References No definition available. + Details
Name: | k_RedZoneMultiemployerPlansFundedPercentage
Namespace Prefix: | k_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Yellow zone multiemployer plans funded percentage. + References No definition available. + Details
Name: | k_YellowZoneMultiemployerPlansFundedPercentage
Namespace Prefix: | k_
Data Type: | num:percentItemType
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_MultiemployerPlansLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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