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FINANCIAL INSTRUMENTS (Hedging components of other comprehensive income) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 30, 2018 | Dec. 31, 2017
Disclosure of detailed information about hedges [line items] |  |
Net gain (loss) on derivatives designated as cash flow hedges | $ (67) | $ 60
Cash flow hedges (note 14(d)) | (10,158) | (27,071)
Foreign currency risk |  |
Disclosure of detailed information about hedges [line items] |  |
Gains (losses) on cash flow hedges, before tax | 6,740 | (6,076)
Cash flow hedges (note 14(d)) | 16 | (4)
Foreign currency risk | Net sales |  |
Disclosure of detailed information about hedges [line items] |  |
Reclassification adjustments on cash flow hedges, before tax | (1,864) | 1,626
Foreign currency risk | Cost of sales |  |
Disclosure of detailed information about hedges [line items] |  |
Reclassification adjustments on cash flow hedges, before tax | (307) | (1,042)
Foreign currency risk | Selling, general and administrative expenses |  |
Disclosure of detailed information about hedges [line items] |  |
Reclassification adjustments on cash flow hedges, before tax | 51 | (2,087)
Foreign currency risk | Financial expenses, net |  |
Disclosure of detailed information about hedges [line items] |  |
Reclassification adjustments on cash flow hedges, before tax | (2,224) | 2,234
Commodity risk |  |
Disclosure of detailed information about hedges [line items] |  |
Gains (losses) on cash flow hedges, before tax | 698 | 11,087
Commodity risk | Inventories |  |
Disclosure of detailed information about hedges [line items] |  |
Income Tax Relating To Reclassification Adjustments On Cash Flow Hedges, Before Tax | (13,303) | (33,294)
Interest rate risk |  |
Disclosure of detailed information about hedges [line items] |  |
Gains (losses) on cash flow hedges, before tax | $ 102 | $ 425

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