XML 161 R40.htm IDEA: XBRL DOCUMENT v3.22.1
Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Disclosure of significant accounting policies [text block] [Abstract]  
Schedule of estimated useful lives
   Years
Buildings and other constructions:   
Administrative facilities  Between 20 and 51
Main production structures  Between 20 and 56
Minor production structures  Between 20 and 35
Machinery and equipment:   
Mills and horizontal furnaces  Between 24 and 45
Vertical furnaces, crushers and grinders  Between 23 and 36
Electricity facilities and other minors  Between 10 and 35
Furniture and fixtures  10
Transportation units:   
Heavy units  Between 5 and 15
Light units  Between 5 and 10
Computer equipment  Between 3 and 10
Tools  Between 5 and 10