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Provisions - Maximum exposure to credit risk - Foreign office guarantees and standby letters of credit (Details) - Foreign office guarantees and standby letters of credit [Member] - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Disclosure of other provisions [line items] |  |  |
Normal | $ 280,462 | $ 341,329 |
Substandard | 376 | 347 |
Non-complying |  |  |
Total | 280,838 | 341,676 | $ 285,035
Stage 1 - Individual [Member] |  |  |
Disclosure of other provisions [line items] |  |  |
Normal | 249,306 | 332,965 |
Substandard |  |  |
Non-complying |  |  |
Total | 249,306 | 332,965 | 274,563
Stage 1 - Group [Member] |  |  |
Disclosure of other provisions [line items] |  |  |
Normal | 395 | 138 |
Substandard |  |  |
Non-complying |  |  |
Total | 395 | 138 | 84
Stage 2 - Individual [Member] |  |  |
Disclosure of other provisions [line items] |  |  |
Normal | 30,761 | 8,226 |
Substandard | 376 | 347 |
Non-complying |  |  |
Total | 31,137 | 8,573 | 10,388
Stage 2 - Group [Member] |  |  |
Disclosure of other provisions [line items] |  |  |
Normal |  |  |
Substandard |  |  |
Non-complying |  |  |
Total |  |  |
Stage 3 - Individual [Member] |  |  |
Disclosure of other provisions [line items] |  |  |
Normal |  |  |
Substandard |  |  |
Non-complying |  |  |
Total |  |  |
Stage 3 - Group [Member] |  |  |
Disclosure of other provisions [line items] |  |  |
Normal |  |  |
Substandard |  |  |
Non-complying |  |  |
Total |  |  |

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- Definition The amount of the exposure to credit risk on loan commitments and financial guarantee contracts. [Refer: Loan commitments [member]; Financial guarantee contracts [member]; Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_35H&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_35I&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_35M&doctype=Standard -URIDate 2019-03-27 + Details
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