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v3.20.2

Subsequent Events (Details) $ in Millions | 1 Months Ended
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Oct. 30, 2020 USD ($)
Subsequent Event [Line Items] |
Number of retired participants accepting settlement of defined benefit pension plan obligations | 8,000
Benefit obligation decrease | $ 470

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- Definition Number of retired participants accepting settlement of defined benefit pension plan obligations. + References No definition available. + Details
Name: | k_NumberOfRetiredParticipantsAcceptingSettlementOfDefinedBenefitPensionPlanObligations
Namespace Prefix: | k_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Definition Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(10) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanSettlementsBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration