XML 41 R28.htm IDEA: XBRL DOCUMENT v3.22.4
Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2022
Summary of significant accounting policies  
Schedule of estimated useful lives of the assets

Asset

    

Useful lives

Buildings and improvements

 

10 to 40 years

Machinery and equipment

 

3 to 20 years

Mine development costs

 

Units-of-production