SALE OF ACCOUNTS RECEIVABLE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Monetization Program | Other Income (Expense), Net
Transfer of Financial Assets Accounted for as Sales [Line Items]
Gain (Loss) on Sale of Accounts Receivable	$ (41)	$ (16)	$ (6)
Monetization Program | Maximum
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfers Of Accounts Receivable Agreements	975	920
Monetization Program | Sold And Outstanding
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfer of Accounts Receivable Agreements	697	609
Kellogg Foreign Subsidiaries Program | Sold And Outstanding
Transfer of Financial Assets Accounted for as Sales [Line Items]
Transfer of Accounts Receivable Agreements	$ 8	$ 31