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PENSION AND OTHER POSTRETIREMENT BENEFITS - Reconciliation For Assets Measure At Fair Value Using Level 3 (Details) - Int'l - USD ($)
$ in Millions
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Reconciliation of Level 3 assets    
Impact of changes in foreign currency exchange rates $ (25.3) $ 71.1
Significant Other Unobservable Inputs (Level 3) | Insurance contracts    
Reconciliation of Level 3 assets    
Balance at the beginning of the year   $ 35.7
Net realized and unrealized gain 1.0  
Purchases 5.9  
Settlements (5.0)  
Transfers 0.1  
Impact of changes in foreign currency exchange rates (0.8)  
Balance at the end of the year $ 36.9