v3.25.2
SALE OF ACCOUNTS RECEIVABLE - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 28, 2025
Jun. 29, 2024
Jun. 28, 2025
Jun. 29, 2024
Dec. 28, 2024
Monetization Program | Other income (expense)          
Transfer of Financial Assets Accounted for as Sales [Line Items]          
Gain (Loss) on Sale of Accounts Receivable $ (9) $ (11) $ (19) $ (22)  
Monetization Program | Maximum [Member]          
Transfer of Financial Assets Accounted for as Sales [Line Items]          
Transfers of Accounts Receivable Agreements 975   975    
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 $ 745   $ 745   $ 653
Kellogg Foreign Subsidiaries Other Program          
Transfer of Financial Assets Accounted for as Sales [Line Items]          
Transfers of Accounts Receivable Agreements         $ 15