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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Details 1) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Disclosure of financial assets [line items] |  |  |
Assets | $ 39,132,512 | $ 35,823,605 |
Liabilities | 35,887,052 | 32,675,685 |
Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities | 2,517,728 | 2,139,488 |
Guarantees received (margin accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities | 540,091 | 408,313 |
Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 12,193 | 22,987 | $ 40,034
Liabilities |  | 7 | 43
Trading Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 485,736 |
Available For Sale Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 77,041 | 2,574,546 |
Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 3,100,635 | 2,238,647 |
Guarantee Deposits (Margin Accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 170,232 | 323,767 |
Recurrent Basis [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 5,742,231 | 5,622,696 |
Liabilities | 2,889,240 | 2,547,801 |
Recurrent Basis [Member] | Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities | 2,517,728 | 2,139,488 |
Recurrent Basis [Member] | Guarantees received (margin accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities | 371,512 | 408,313 |
Recurrent Basis [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 2,439,926 | 3,354,635 |
Liabilities |  | 408,313 |
Recurrent Basis [Member] | Level 1 [Member] | Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  |  |
Recurrent Basis [Member] | Level 1 [Member] | Guarantees received (margin accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 408,313 |
Recurrent Basis [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 3,290,112 | 2,245,074 |
Liabilities | 2,888,445 | 2,139,481 |
Recurrent Basis [Member] | Level 2 [Member] | Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities | 2,516,933 | 2,139,481 |
Recurrent Basis [Member] | Level 2 [Member] | Guarantees received (margin accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities | 371,512 |  |
Recurrent Basis [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 12,193 | 22,987 |
Liabilities | 795 | 7 |
Recurrent Basis [Member] | Level 3 [Member] | Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities | 795 | 7 |
Recurrent Basis [Member] | Level 3 [Member] | Guarantees received (margin accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  |  |
Recurrent Basis [Member] | Trading Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 485,736 |
Recurrent Basis [Member] | Trading Investments [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 481,642 |
Recurrent Basis [Member] | Trading Investments [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 4,094 |
Recurrent Basis [Member] | Trading Investments [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Recurrent Basis [Member] | Available For Sale Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 2,574,546 |
Recurrent Basis [Member] | Available For Sale Investments [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 2,549,226 |
Recurrent Basis [Member] | Available For Sale Investments [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 24,674 |
Recurrent Basis [Member] | Available For Sale Investments [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 646 |
Recurrent Basis [Member] | Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 3,100,635 | 2,238,647 |
Recurrent Basis [Member] | Financial Derivative Contracts [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Recurrent Basis [Member] | Financial Derivative Contracts [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 3,089,077 | 2,216,306 |
Recurrent Basis [Member] | Financial Derivative Contracts [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 11,558 | 22,341 |
Recurrent Basis [Member] | Guarantee Deposits (Margin Accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 170,232 | 323,767 |
Recurrent Basis [Member] | Guarantee Deposits (Margin Accounts) [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 323,767 |
Recurrent Basis [Member] | Guarantee Deposits (Margin Accounts) [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 170,232 |  |
Recurrent Basis [Member] | Guarantee Deposits (Margin Accounts) [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Recurrent Basis [Member] | Financial Assets Held For Trading [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 77,041 |  |
Recurrent Basis [Member] | Financial Assets Held For Trading [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 71,158 |  |
Recurrent Basis [Member] | Financial Assets Held For Trading [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 5,883 |  |
Recurrent Basis [Member] | Financial Assets Held For Trading [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Recurrent Basis [Member] | Debt Instrument At FVOCI [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 2,394,323 |  |
Recurrent Basis [Member] | Debt Instrument At FVOCI [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 2,368,768 |  |
Recurrent Basis [Member] | Debt Instrument At FVOCI [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 24,920 |  |
Recurrent Basis [Member] | Debt Instrument At FVOCI [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | $ 635 |  |

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