DERIVATIVE INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Fair value measurements on a nonrecurring basis (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, Plant and Equipment, Net	$ 3,234	$ 3,212
Impairment of property	60	$ 0	$ 0
North America Frozen Supply Chain Network Reconfiguration | North America
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, Plant and Equipment, Net	62
North America Frozen Supply Chain Network Reconfiguration | North America | Cost of goods sold
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of property	21
North America Frozen Supply Chain Network Reconfiguration | North America | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, Plant, and Equipment, Fair Value Disclosure	41
European Cereal Supply Chain Network Reconfiguration | Europe
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, Plant and Equipment, Net	99
European Cereal Supply Chain Network Reconfiguration | Europe | Cost of goods sold
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of property	39
European Cereal Supply Chain Network Reconfiguration | Europe | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, Plant, and Equipment, Fair Value Disclosure	$ 60