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INVESTMENTS UNDER RESALE AGREEMENTS AND OBLIGATIONS UNDER REPURCHASE AGREEMENTS (Details 2) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of fair value measurement of assets [line items] |  |
Total | $ 49,281 | $ 268,061
Other Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 132 | 1,156
Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  | 24,910
Available For Sale Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 49,281 | 268,061
Available For Sale Portfolio [Member] | Other Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 132 | 1,156
Available For Sale Portfolio [Member] | Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  | 24,910
Trading Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Trading Portfolio [Member] | Other Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Trading Portfolio [Member] | Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Time Deposits In Chilean Financial Institutions [Member] | Other Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 132 | 1,156
Time Deposits In Chilean Financial Institutions [Member] | Available For Sale Portfolio [Member] | Other Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 132 | 1,156
Time Deposits In Chilean Financial Institutions [Member] | Trading Portfolio [Member] | Other Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Securities From Government Or Foreign Central Banks [Member] | Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  | 24,910
Securities From Government Or Foreign Central Banks [Member] | Available For Sale Portfolio [Member] | Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  | 24,910
Securities From Government Or Foreign Central Banks [Member] | Trading Portfolio [Member] | Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 49,149 | 241,995
Chilean Central Bank And Government Securities [Member] | Available For Sale Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 49,149 | 241,995
Chilean Central Bank And Government Securities [Member] | Trading Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 49,040 |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member] | Available For Sale Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 49,040 |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member] | Trading Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member] | Available For Sale Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member] | Trading Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] | Other Chilean Central Bank And Government Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 109 | 241,995
Chilean Central Bank And Government Securities [Member] | Other Chilean Central Bank And Government Securities [Member] | Available For Sale Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 109 | 241,995
Chilean Central Bank And Government Securities [Member] | Other Chilean Central Bank And Government Securities [Member] | Trading Portfolio [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |

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