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Summary of significant accounting policies (Details 1) - $ / perunit		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
US Dollar [Member]
Closing foreign exchange rate		614.75	669.47	710.16
Euros [Member]
Closing foreign exchange rate		739.15	705.60	774.61
Argentinean Pesos [Member]
Closing foreign exchange rate		32.96	42.13	54.46
Uruguayan Peso [Member]
Closing foreign exchange rate		21.34	22.82	23.71
Canadian Dollar [Member]
Closing foreign exchange rate		491.05	498.38	511.50
Sterling Pound [Member]
Closing foreign exchange rate		832.09	826.10	1,053.02
Paraguayan Guarani [Member]
Closing foreign exchange rate		0.11	0.12	0.12
Bolivians [Member]
Closing foreign exchange rate		89.61	97.59	103.67
Colombian Peso [Member]
Closing foreign exchange rate		0.21	0.22	0.22
Unidades de Fomento
Closing foreign exchange rate	[1]	26,798.14	26,347.98	25,629.09
[1] The Unidad de Fomento (UF) is a Chilean inflation-indexed, peso-denominated monetary unit. The UF rate is set daily in advance based on changes in the previous month's inflation rate.

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- Definition

The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

+ References

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

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