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Sale of Accounts Receivable - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 01, 2023 | Jul. 02, 2022 | Jul. 01, 2023 | Jul. 02, 2022 | Dec. 31, 2022
Monetization Program | Other income (expense) |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales [Line Items] |  |  |  |  |
Gain (Loss) on Sale of Accounts Receivable | $ (15) | $ (3) | $ (27) | $ (5) |
Monetization Program | Maximum [Member] |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales [Line Items] |  |  |  |  |
Transfers of Accounts Receivable Agreements | 1,100 |  | 1,100 |  | $ 920
Monetization Program | Sold And Outstanding |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales [Line Items] |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized | 999 |  | 999 |  | 865
Kellogg Foreign Subsidiaries Other Program |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales [Line Items] |  |  |  |  |
Transfers of Accounts Receivable Agreements | $ 8 |  | $ 8 |  | $ 31

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- Definition Amount of gain (loss) on sale of accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-5 + Details
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- Definition Amount of derecognized financial assets from transactions which comprise an initial transfer and an agreement entered into in contemplation of the initial transfer resulting in retention of substantially all of the exposure to the economic return throughout the term of the transaction, at the date of derecognition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4D -Subparagraph (a) -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-4D + Details
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- Definition 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. + References No definition available. + Details
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