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FINANCIAL INSTRUMENTS (Commodity contracts outstanding) (Details) - Commodity risk - Cash flow hedges barrel in Thousands, $ in Thousands | 12 Months Ended
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Dec. 30, 2018 USD ($) pound barrel
Disclosure of detailed information about hedging instruments [line items] |
Financial assets, fair value | $ (10,677)
Forward contracts |
Disclosure of detailed information about hedging instruments [line items] |
Nominal amount of hedging instrument | pound | 76,000
Financial assets, fair value | $ (2,837)
Swap contracts |
Disclosure of detailed information about hedging instruments [line items] |
Nominal amount of hedging instrument | pound | 147,680
Financial assets, fair value | $ (5,516)
Swap And Option Contract [Member] |
Disclosure of detailed information about hedging instruments [line items] |
Nominal amount of hedging instrument | barrel | 0
Financial assets, fair value | $ (2,324)
Minimum |
Disclosure of detailed information about hedging instruments [line items] |
Remaining maturity | 0 years
Maximum |
Disclosure of detailed information about hedging instruments [line items] |
Remaining maturity | 12 years
Accounts payable and accrued liabilities (1) |
Disclosure of detailed information about hedging instruments [line items] |
Financial assets, carrying value | $ (11,158)
Accounts payable and accrued liabilities (1) | Forward contracts |
Disclosure of detailed information about hedging instruments [line items] |
Financial assets, carrying value | (3,173)
Accounts payable and accrued liabilities (1) | Swap contracts |
Disclosure of detailed information about hedging instruments [line items] |
Financial assets, carrying value | (5,516)
Accounts payable and accrued liabilities (1) | Swap And Option Contract [Member] |
Disclosure of detailed information about hedging instruments [line items] |
Financial assets, carrying value | (2,469)
Financial assets included in prepaid expenses, deposits and other current assets |
Disclosure of detailed information about hedging instruments [line items] |
Financial assets, carrying value | 481
Financial assets included in prepaid expenses, deposits and other current assets | Forward contracts |
Disclosure of detailed information about hedging instruments [line items] |
Financial assets, carrying value | 336
Financial assets included in prepaid expenses, deposits and other current assets | Swap contracts |
Disclosure of detailed information about hedging instruments [line items] |
Financial assets, carrying value | 0
Financial assets included in prepaid expenses, deposits and other current assets | Swap And Option Contract [Member] |
Disclosure of detailed information about hedging instruments [line items] |
Financial assets, carrying value | $ 145

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