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SALE OF ACCOUNTS RECEIVABLE (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Jan. 01, 2022
Jan. 02, 2021
Monetization Program | Other Income (Expense), Net      
Transfer of Financial Assets Accounted for as Sales [Line Items]      
Gain (Loss) on Sale of Accounts Receivable $ (23) $ (8) $ (14)
Monetization Program | Maximum      
Transfer of Financial Assets Accounted for as Sales [Line Items]      
Transfers Of Accounts Receivable Agreements 920 1,100  
Monetization Program | Sold And Outstanding      
Transfer of Financial Assets Accounted for as Sales [Line Items]      
Transfer of Accounts Receivable Agreements 865 549  
Kellogg Foreign Subsidiaries Program | Sold And Outstanding      
Transfer of Financial Assets Accounted for as Sales [Line Items]      
Transfer of Accounts Receivable Agreements $ 31 $ 66