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FINANCIAL INSTRUMENTS (Additional Information) (Details)
pound in Millions
 12 Months Ended
Jan. 03, 2021
USD ($)
shares
pound
Dec. 29, 2019
USD ($)
pound
shares
Disclosure of detailed information about hedged items [line items]    
Cash flow hedges (note 14(d)) $ (8,503,000) $ (3,917,000)
Net losses in AOCI expected to be reclassified to inventory or net earnings within the next twelve months $ 2,100,000  
Total Return Swap    
Disclosure of detailed information about hedged items [line items]    
Term of TRS 1 year  
Nominal amount of derivative | shares 284,663 216,727
Notional amount $ 400,000 $ 0.3
Cash flow hedges    
Disclosure of detailed information about hedged items [line items]    
Ineffectiveness recognized in net earnings 0  
Cash flow hedges (note 14(d)) $ 9,000,000.0  
Commodity risk | Cash flow hedges | Forward contracts    
Disclosure of detailed information about hedged items [line items]    
Nominal amount of derivative | pound 16.2 133.7