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Income taxes (Details) - CLP ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
IncomeTaxes [Line Items] |  |  |
Current tax assets, current |  | $ 17,302,429 | $ 28,027,878
Refundable tax previous year |  |  |
IncomeTaxes [Line Items] |  |  |
Current tax assets, current |  | 11,884,421 | 9,640,567
Taxes under claim [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Current tax assets, current | [1] | 968,195 | 968,195
Argentinean tax credits [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Current tax assets, current |  | 440,172 | 4,813,614
Monthly provisions [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Current tax assets, current |  | 3,686,905 | 12,537,248
Payment of absorbed profit provision [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Current tax assets, current |  | 0 | 24,104
Other credits [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Current tax assets, current |  | $ 322,736 | $ 44,150
[1] | This item includes claims for refund of first category taxes (Provisional payment of absorved profit) for an amount of ThCh$ 968,195 that was presented in April 2014 from the commercial year 2013.

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