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Provisions - Confirmed Foreign Letters of Credit - Outstanding Exposures (Details) - Confirmed foreign letters of credit [Member] - CLP ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of other provisions [line items] |  |
Exposure as at beginning of period | $ 56,764 | $ 64,970
Net change on exposures | 46,648 | (15,447)
Transfer to Stage 1 |  |
Transfer to Stage 2 |  |
Transfer to Stage 3 |  |
Foreign exchange adjustments | (8,739) | 7,241
Exposure as at ending of period | 94,673 | 56,764
Stage 1 - Individual [Member] |  |
Disclosure of other provisions [line items] |  |
Exposure as at beginning of period | 56,764 | 64,970
Net change on exposures | 46,648 | (15,455)
Transfer to Stage 1 |  |
Transfer to Stage 2 |  |
Transfer to Stage 3 |  |
Foreign exchange adjustments | (8,739) | 7,249
Exposure as at ending of period | 94,673 | 56,764
Stage 1 - Group [Member] |  |
Disclosure of other provisions [line items] |  |
Exposure as at beginning of period |  |
Net change on exposures |  |
Transfer to Stage 1 |  |
Transfer to Stage 2 |  |
Transfer to Stage 3 |  |
Foreign exchange adjustments |  |
Exposure as at ending of period |  |
Stage 2 - Individual [Member] |  |
Disclosure of other provisions [line items] |  |
Exposure as at beginning of period |  |
Net change on exposures |  | 8
Transfer to Stage 1 |  |
Transfer to Stage 2 |  |
Transfer to Stage 3 |  |
Foreign exchange adjustments |  | (8)
Exposure as at ending of period |  |
Stage 2 - Group [Member] |  |
Disclosure of other provisions [line items] |  |
Exposure as at beginning of period |  |
Net change on exposures |  |
Transfer to Stage 1 |  |
Transfer to Stage 2 |  |
Transfer to Stage 3 |  |
Foreign exchange adjustments |  |
Exposure as at ending of period |  |
Stage 3 - Individual [Member] |  |
Disclosure of other provisions [line items] |  |
Exposure as at beginning of period |  |
Net change on exposures |  |
Transfer to Stage 1 |  |
Transfer to Stage 2 |  |
Transfer to Stage 3 |  |
Foreign exchange adjustments |  |
Exposure as at ending of period |  |
Stage 3 - Group [Member] |  |
Disclosure of other provisions [line items] |  |
Exposure as at beginning of period |  |
Net change on exposures |  |
Transfer to Stage 1 |  |
Transfer to Stage 2 |  |
Transfer to Stage 3 |  |
Foreign exchange adjustments |  |
Exposure as at ending of period |  |

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- Definition The increase (decrease) in exposure to credit risk on loan commitments and financial guarantee contracts resulting from transfer to stage 1. + References No definition available. + Details
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- Definition The increase (decrease) in exposure to credit risk on loan commitments and financial guarantee contracts resulting from transfer to stage 3. + References No definition available. + Details
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- Definition The increase (decrease) in exposure to credit risk on loan commitments and financial guarantee contracts resulting from transfer to stage 2. + References No definition available. + Details
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