Name:	k_PayablesFinancedByParticipatingSuppliers
Namespace Prefix:	k_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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.

No definition available.

Name:	k_PayablesPlacedOnTrackingSystem
Namespace Prefix:	k_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of the decrease in the period in the valuation allowance for a specified deferred tax asset.

No definition available.

Name:	k_ReductionsCreditedToIncomeTaxExpenseDecreasingValuationAllowance
Namespace Prefix:	k_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

No definition available.

Name:	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification
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.