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INVESTMENTS UNDER RESALE AGREEMENTS AND OBLIGATIONS UNDER REPURCHASE AGREEMENTS (Details 1) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of fair value measurement of assets [line items] |  |
Total | $ 48,545 | $ 268,061
Other Domestic Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 128 | 1,156
Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  | 24,910
From 1 Day And Less Than 3 Months [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 48,545 | 268,023
From 1 Day And Less Than 3 Months [Member] | Other Domestic Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 128 | 1,118
From 1 Day And Less Than 3 Months [Member] | Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  | 24,910
More Than 3 Months To 1 Year [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  | 38
More Than 3 Months To 1 Year [Member] | Other Domestic Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  | 38
More Than 3 Months To 1 Year [Member] | Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
More Than 1 Year [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
More Than 1 Year [Member] | Other Domestic Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
More Than 1 Year [Member] | Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Time Deposits In Chilean Financial Institutions [Member] | Other Domestic Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 128 | 1,156
Time Deposits In Chilean Financial Institutions [Member] | From 1 Day And Less Than 3 Months [Member] | Other Domestic Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 128 | 1,118
Time Deposits In Chilean Financial Institutions [Member] | More Than 3 Months To 1 Year [Member] | Other Domestic Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  | 38
Time Deposits In Chilean Financial Institutions [Member] | More Than 1 Year [Member] | Other Domestic 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] | From 1 Day And Less Than 3 Months [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] | More Than 3 Months To 1 Year [Member] | Other Foreign Chilean Securities [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Securities From Government Or Foreign Central Banks [Member] | More Than 1 Year [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 | 48,417 | 241,995
Chilean Central Bank And Government Securities [Member] | From 1 Day And Less Than 3 Months [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 48,417 | 241,995
Chilean Central Bank And Government Securities [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] | More Than 1 Year [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 | 48,307 |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member] | From 1 Day And Less Than 3 Months [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 48,307 |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member] | More Than 1 Year [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] | From 1 Day And Less Than 3 Months [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member] | More Than 1 Year [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 | 110 | 241,995
Chilean Central Bank And Government Securities [Member] | Other Chilean Central Bank And Government Securities [Member] | From 1 Day And Less Than 3 Months [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total | 110 | 241,995
Chilean Central Bank And Government Securities [Member] | Other Chilean Central Bank And Government Securities [Member] | More Than 3 Months To 1 Year [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] | More Than 1 Year [Member] |  |
Disclosure of fair value measurement of assets [line items] |  |
Total |  |

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