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Loans and Advances to Banks, net - Impairment allowance for due from banks (Details) $ in Thousands, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 CLP ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 CLP ($) | Dec. 31, 2017 CLP ($)
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Loans and advances with domestic banks |  |  | $ 99,776 | $ 119,998
Loans and advances with foreign banks |  |  | 293,777 | 289,107
Loans and advances with central bank of Chile |  |  | 1,100,831 | 350,916
Loans and advances to banks |  | $ 2,154,533 | 1,494,384 | 760,021
Financial assets at beginning of period | $ 4,390,903 |  |  |
Financial assets at end of period | 4,312,504 |  |  |
Gross Balance |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Loans and advances to banks |  |  | 1,495,396 | 760,285
Loans and advances to banks, net | Gross Balance |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Loans and advances with domestic banks |  |  | 100,023 | 120,017
Loans and advances with foreign banks |  |  | 294,542 | 289,352
Loans and advances with central bank of Chile |  |  | 1,100,831 | 350,916
Loans and advances to banks |  |  | 1,495,396 | 760,285
Financial assets at beginning of period | 760,285 |  |  |
Net change on financial assets | 748,184 |  |  |
Foreign exchange adjustments | (13,073) |  |  |
Financial assets at end of period | 1,495,396 |  |  |
Loans and advances to banks, net | Accumulated Amortization |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Financial assets at beginning of period | (772) |  |  |
Net change on financial assets | (259) |  |  |
Impact on year end ECL of exposures transferred between stages during the year | (3) |  |  |
Foreign exchange adjustments | 22 |  |  |
Financial assets at end of period | (1,012) |  |  |
Loans and advances to banks, net | 12-month expected credit losses | Individual | Financial instruments not credit-impaired | Gross Balance |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Loans and advances with domestic banks |  |  | 100,023 |
Loans and advances with foreign banks |  |  | 266,648 |
Loans and advances with central bank of Chile |  |  | 1,100,831 |
Loans and advances to banks |  |  | 1,467,502 |
Financial assets at beginning of period | 760,285 |  |  |
Net change on financial assets | 746,808 |  |  |
Transfer to Stage 2 | (26,518) |  |  |
Foreign exchange adjustments | (13,073) |  |  |
Financial assets at end of period | 1,467,502 |  |  |
Loans and advances to banks, net | 12-month expected credit losses | Individual | Financial instruments not credit-impaired | Accumulated Amortization |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Financial assets at beginning of period | (772) |  |  |
Net change on financial assets | (250) |  |  |
Transfer to Stage 2 | 63 |  |  |
Foreign exchange adjustments | 22 |  |  |
Financial assets at end of period | (937) |  |  |
Loans and advances to banks, net | Lifetime expected credit losses | Individual | Financial instruments not credit-impaired | Gross Balance |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Loans and advances with foreign banks |  |  | 27,894 |
Loans and advances to banks |  |  | 27,894 |
Net change on financial assets | 1,376 |  |  |
Transfer to Stage 2 | 26,518 |  |  |
Financial assets at end of period | 27,894 |  |  |
Loans and advances to banks, net | Lifetime expected credit losses | Individual | Financial instruments not credit-impaired | Accumulated Amortization |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Net change on financial assets | (9) |  |  |
Transfer to Stage 2 | (63) |  |  |
Impact on year end ECL of exposures transferred between stages during the year | (3) |  |  |
Financial assets at end of period | $ (75) |  |  |
Loans and advances to banks, net | Normal | Gross Balance |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Loans and advances with domestic banks |  |  | 100,023 | 120,017
Loans and advances with foreign banks |  |  | 294,542 | 289,352
Loans and advances with central bank of Chile |  |  | 1,100,831 | $ 350,916
Loans and advances to banks, net | Normal | 12-month expected credit losses | Individual | Financial instruments not credit-impaired | Gross Balance |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Loans and advances with domestic banks |  |  | 100,023 |
Loans and advances with foreign banks |  |  | 266,648 |
Loans and advances with central bank of Chile |  |  | 1,100,831 |
Loans and advances to banks, net | Normal | Lifetime expected credit losses | Individual | Financial instruments not credit-impaired | Gross Balance |  |  |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |  |  |
Loans and advances with foreign banks |  |  | $ 27,894 |

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