XML 35 R25.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Proposed separation transactions (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2022 | Oct. 01, 2022
Discontinued Operations and Disposal Groups [Abstract] |  |
Proposed separation transaction related costs | $ 18 | $ 22

X
- Definition Proposed separation transaction related costs. + References No definition available. + Details
Name: | k_ProposedSeparationTransactionCosts
Namespace Prefix: | k_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration