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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Details) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of financial assets [line items] |  |  |
Assets |  | $ 39,132,512 | $ 35,823,605
Liabilities |  | 35,887,052 | 32,675,685
Deposits and Interbank Borrowings [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 8,741,417 | 7,768,166
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
Trading Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  | 485,736
Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 3,100,635 | 2,238,647
Loans and Account Receivable From Customers and Interbank Loans, Net [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | [1] |  | 27,563,229
Available For Sale Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 77,041 | 2,574,546
Guarantee Deposits (Margin Accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 170,232 | 323,767
Book Value [Member] | Deposits and Interbank Borrowings [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 23,597,863 | 21,380,468
Book Value [Member] | Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 2,517,728 | 2,139,488
Book Value [Member] | Issued Debt Instruments And Other Financial Liabilities [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 8,330,633 | 7,335,683
Book Value [Member] | Guarantees received (margin accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 371,512 | 408,313
Book Value [Member] | Trading Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  | 485,736
Book Value [Member] | Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 3,100,635 | 2,238,647
Book Value [Member] | Loans and Account Receivable From Customers and Interbank Loans, Net [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  | 26,934,757
Book Value [Member] | Debt Instrument At FVOCI [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 2,394,323 |
Book Value [Member] | Available For Sale Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  | 2,574,546
Book Value [Member] | Guarantee Deposits (Margin Accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 170,232 | 323,767
Book Value [Member] | Loans And Accounts Receivable At Amortised Cost [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 29,331,001 |
Book Value [Member] | Loans And Accounts Receivable At Fvoci Net [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 68,588 |
Book Value [Member] | Financial Assets Held For Trading [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 77,041 |
At Fair Value [Member] | Deposits and Interbank Borrowings [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 23,770,106 | 20,887,959
At Fair Value [Member] | Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 2,517,728 | 2,139,488
At Fair Value [Member] | Issued Debt Instruments And Other Financial Liabilities [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 8,605,135 | 7,487,591
At Fair Value [Member] | Guarantees received (margin accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Liabilities |  | 371,512 | 408,313
At Fair Value [Member] | Trading Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  | 485,736
At Fair Value [Member] | Financial Derivative Contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 3,100,635 | 2,238,647
At Fair Value [Member] | Loans and Account Receivable From Customers and Interbank Loans, Net [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  | 28,518,929
At Fair Value [Member] | Debt Instrument At FVOCI [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 2,394,323 |
At Fair Value [Member] | Available For Sale Investments [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  | 2,574,546
At Fair Value [Member] | Guarantee Deposits (Margin Accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 170,232 | 323,767
At Fair Value [Member] | Loans And Accounts Receivable At Amortised Cost [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 30,575,611 |
At Fair Value [Member] | Loans And Accounts Receivable At Fvoci Net [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 68,588 |
At Fair Value [Member] | Financial Assets Held For Trading [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | $ 77,041 |
[1] | Loans and accounts receivables from customers are presented on a gross basis. Provisions amounts according to type of loan are detailed as follows: Commercial loans Ch$ 437,863 million, Mortgage loans Ch$ 69,066 million, and Consumer loans Ch$ 283,756 million.

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