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9. PROPERTY, PLANT AND EQUIPMENT (Details 3)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Buildings and Infrastructure [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Average estimated useful lives 38 years 38 years
Machinery, Equipment and Facilities [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Average estimated useful lives 21 years 22 years
Fixtures and Fixtures [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Average estimated useful lives 12 years 11 years
Other [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Average estimated useful lives 14 years 15 years