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SUPPLEMENTARY INFORMATION RELATING TO THE NATURE OF EXPENSES (Employee benefit expenses) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Jan. 01, 2017
Analysis of income and expense [abstract]    
Salaries, wages and other short-term employee benefits $ 504,366 $ 459,041
Share-based payments 16,065 15,756
Post-employment benefits 30,376 25,089
Employee benefits expenses $ 550,807 $ 499,886