Borrowing costs (Tables)

12 Months Ended

Dec. 31, 2017

Borrowing costs [abstract]

Disclosure of rates and costs for capitalized interest of property, plant and equipment [Text Block]

The rates and costs for capitalized interest of property, plant and equipment are detailed as follows:

	12/31/2017			12/31/2016
Capitalization rate of costs for capitalized interest, property, plant and equipment		4	%		4	%
Amount of costs for interest capitalized in ThUS$		4,382			5,406