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RESTRUCTURING - Restructuring Program Reserves Narrative (Details) - USD ($) $ in Millions | Jun. 29, 2024 | Dec. 30, 2023
--- | --- | ---
Restructuring Cost and Reserve [Line Items] |  |
Project reserve | $ 34 | $ 0
Employee Related Costs [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Project reserve | 34 | $ 0
Europe | Employee Related Costs [Member] | European Cereal Supply Chain Network Reconfiguration |  |
Restructuring Cost and Reserve [Line Items] |  |
Project reserve | 30 |
North America | Employee Related Costs [Member] | North America Frozen Supply Chain Network Reconfiguration |  |
Restructuring Cost and Reserve [Line Items] |  |
Project reserve | $ 4 |

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