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Accounting Policies - Narrative (Details) - USD ($) $ in Millions | Apr. 01, 2023 | Dec. 31, 2022
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Accounting Policies [Abstract] |  |
Obligations placed in accounts payable tracking system | $ 1,100 | $ 1,100
Minimum [Member] |  |
Supplier finance program general payment timing, period | 0 days |
Maximum [Member] |  |
Supplier finance program general payment timing, period | 150 days |

X
- Definition Amount of payables financed by suppliers that had been placed on the accounts payable tracking system which facilitates participating suppliers' ability to finance payment obligations from the company with designated third party financial institutions. + References No definition available. + Details
Name: | k_PayablesPlacedOnTrackingSystem
Namespace Prefix: | k_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Supplier Finance Program, Payment Timing, Period + References No definition available. + Details
Name: | k_SupplierFinanceProgramPaymentTimingPeriod
Namespace Prefix: | k_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
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: |