XML 68 R197.htm IDEA: XBRL DOCUMENT v3.20.1
Tax situation - Income tax expense (benefit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income tax      
Deferred $ (37,501) $ 9,997 $ (5,825)
Supplementary retirement fund      
Income tax expense reported in the statements of comprehensive income 25,590 (26,879) (17,888)
Sociedad Minera Cerro Verde S.A.A. [Member]      
Income tax      
Current 107,666 254,767 430,974
Deferred 139,934 61,483 (167,541)
income tax expense (benefit) 247,600 316,250 263,433
Mining taxes      
Current mining royalty and special mining tax 47,032 6,661 213,280
Supplementary retirement fund      
Current 1,835 1,499 10,897
Deferred 1,607 760 (1,567)
Total Supplementary retirement fund 3,442 2,259 9,330
Income tax expense reported in the statements of comprehensive income $ 298,074 $ 325,170 $ 486,043