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Interbank borrowings (Details 1) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items] |  |
Interbank borrowings | $ 2,519,818 | $ 1,788,626
Loans From Domestic Financial Institutions [Member] |  |
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items] |  |
Interbank borrowings | 286,603 |
Loans From Domestic Financial Institutions [Member] | Due Within 1 Year [Member] |  |
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items] |  |
Interbank borrowings | 158,855 |
Loans From Domestic Financial Institutions [Member] | Due After 1 Year But Within 2 Years [Member] |  |
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items] |  |
Interbank borrowings | 117,344 |
Loans From Domestic Financial Institutions [Member] | Due After 2 Years But Within 3 years [Member] |  |
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items] |  |
Interbank borrowings | 8,167 |
Loans From Domestic Financial Institutions [Member] | Due After 3 Years But Within 4 Years [Member] |  |
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items] |  |
Interbank borrowings | 2,237 |
Loans From Domestic Financial Institutions [Member] | Due After 5 Years [Member] |  |
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items] |  |
Interbank borrowings |  |

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