Selling Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Selling Expenses [Line Items]
Sales and marketing expense	$ 24,313	$ 26,948	$ 23,043
Sociedad Minera Cerro Verde S.A.A. [Member]
Disclosure of Selling Expenses [Line Items]
concentrate freight	98,933	126,670	131,528
commissions	5,588	6,048	6,029
cathode freight	1,890	1,831	1,665
Other	3,072	2,459	2,447
Sales and marketing expense	$ 109,483	$ 137,008	$ 141,669

The amount of expense relating to the marketing and selling of goods or services.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 85
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_85&doctype=Standard
-URIDate 2019-03-27

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Period Type:	duration