Railway for transportation of products between the site Coya Sur and the Port of Tocopilla (Details Textual) $ in Millions	9 Months Ended
Sep. 30, 2017 USD ($)
Disclosure of Railway for transportation of products between the site Coya Sur and the Port of Tocopilla [Line Items]
Transportation expense	$ 32
Percentage for Transportation expense in total assets	0.70%

The amount of expense arising from transportation services.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_TransportationExpense
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration