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LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses)
 12 Months Ended
Dec. 31, 2020
Labor Costs [Abstract]  
LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses) LABOR COSTS (Included Cost of sales and Selling, General and Administrative expenses)
Year ended December 31,
202020192018
Wages, salaries and social security costs677,541 759,678 884,536 
Termination benefits 25,265 28,269 26,601 
Post-employment benefits (Note 20 (i))36,093 39,086 29,862 
 Labor costs738,899 827,033 940,999 
As of December 31, 2020, 2019 and 2018, the quantity of employees was 20,173, 19,863 and 20,660, respectively.