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Income taxes (Details 1) - CLP ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
IncomeTaxes [Line Items]    
Current tax assets, non-current $ 1,270,941 $ 1,316,300
Taxes under claim [Member]    
IncomeTaxes [Line Items]    
Current tax assets, non-current [1] 1,173,281 1,173,281
Others [Member]    
IncomeTaxes [Line Items]    
Current tax assets, non-current [2] $ 97,660 $ 143,019
[1] This item includes claims for refund of first category taxes (Provisional payment of absorved profit) that was presented in April 2010 from the commercial year 2009.
[2] Corresponds to the minimum presumed income tax of Argentine subsidiaries, whose recovery period is estimated to be more than one year.