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SALE OF ACCOUNTS RECEIVABLE (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Monetization Program | Other Income (Expense), Net      
Transfer of Financial Assets Accounted for as Sales [Line Items]      
Gain (Loss) on Sale of Accounts Receivable $ (40) $ (41) $ (16)
Monetization Program | Maximum      
Transfer of Financial Assets Accounted for as Sales [Line Items]      
Transfers Of Accounts Receivable Agreements 975    
Monetization Program | Sold And Outstanding      
Transfer of Financial Assets Accounted for as Sales [Line Items]      
Transfer of Accounts Receivable Agreements 653 697  
Kellogg Foreign Subsidiaries Program | Sold And Outstanding      
Transfer of Financial Assets Accounted for as Sales [Line Items]      
Transfer of Accounts Receivable Agreements $ 15 $ 8