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SUPPLEMENTARY INFORMATION RELATING TO THE NATURE OF EXPENSES (Employee benefit expenses) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2018
Dec. 31, 2017
Analysis of income and expense [abstract]    
Salaries, wages and other short-term employee benefits $ 541,769 $ 504,366
Share-based payments 19,974 16,065
Post-employment benefits 31,922 30,376
Employee benefits expenses $ 593,665 $ 550,807