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FINANCIAL INSTRUMENTS (Summary of hedged items) (Details) - Cash flow hedges - USD ($) $ in Thousands | Dec. 29, 2019 | Dec. 30, 2018
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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)

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