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FINANCIAL INSTRUMENTS (Summary of hedged items) (Details) - Cash flow hedges - USD ($)
$ in Thousands
Dec. 29, 2019
Dec. 30, 2018
Disclosure of detailed information about hedging instruments [line items]    
Financial assets, carrying value $ 0 $ 0
Financial liabilities, carrying value 0 0
Change in value used for calculating hedge ineffectiveness (535) 3,382
Cash flow hedge reserve (AOCI) 535 (3,382)
Foreign currency risk | Forecast sales    
Disclosure of detailed information about hedging instruments [line items]    
Financial assets, carrying value 0 0
Financial liabilities, carrying value 0 0
Change in value used for calculating hedge ineffectiveness (972) 2,752
Cash flow hedge reserve (AOCI) 972 (2,752)
Foreign currency risk | Forecast expenses    
Disclosure of detailed information about hedging instruments [line items]    
Financial assets, carrying value 0 0
Financial liabilities, carrying value 0 0
Change in value used for calculating hedge ineffectiveness 342 (897)
Cash flow hedge reserve (AOCI) (342) 897
Commodity risk | Forecast purchases    
Disclosure of detailed information about hedging instruments [line items]    
Financial assets, carrying value 0 0
Financial liabilities, carrying value 0 0
Change in value used for calculating hedge ineffectiveness (1,416) (10,677)
Cash flow hedge reserve (AOCI) 1,416 10,677
Interest rate risk    
Disclosure of detailed information about hedging instruments [line items]    
Financial assets, carrying value 0 0
Financial liabilities, carrying value 0 0
Change in value used for calculating hedge ineffectiveness 1,511 12,204
Cash flow hedge reserve (AOCI) $ (1,511) $ (12,204)