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Quarterly Financial Data Narrative (Details) | Jan. 02, 2021
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Quarterly Financial Information Disclosure [Abstract] |
Number Of Shareholders | 30,305

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- Definition Number of Shareholders of record at year-end. + References No definition available. + Details
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Namespace Prefix: | k_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration