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II. Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2019
Statement Line Items [Line Items]  
Disclosure of detailed information about the estimated useful lives of property, plant and equipment [text block]
 
Land
No Depreciation
 
Buildings and improvements
30-50 years
 
Plant and production equipment
10-40 years
 
Vehicles, furniture and fixtures, and other equipment
4-10 years
Amount by which value assigned to key assumption must change in order for unit's recoverable amount to be equal to carrying amount [text block]
Increase in the discount rate
95 Bps
Decrease of the growth rate
-1.6 %
Decrease of the cash flow projections
-15.3 %