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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Details 6) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of financial assets [line items] |  |
Assets | $ 3,100,635 | $ 2,238,647
Liability | 2,517,728 | 2,139,488
Financial Liabilities Derivative Contracts With Collateral Agreement Threshold Equal To Zero [Member] |  |
Disclosure of financial assets [line items] |  |
Liability | 2,133,149 | 1,773,471
Financial Liabilities Derivative Contracts With Non-Zero Threshold Collateral Agreement [Member] |  |
Disclosure of financial assets [line items] |  |
Liability | 262,683 | 316,840
Financial Liabilities Derivative Contracts Without Collateral Agreement [Member] |  |
Disclosure of financial assets [line items] |  |
Liability | 121,896 | 49,177
Financial Assets Derivative Contracts With Collateral Agreement Threshold Equal To Zero [Member] |  |
Disclosure of financial assets [line items] |  |
Assets | 2,639,835 | 1,898,220
Financial Assets Derivative Contracts With Non-Zero Threshold Collateral Agreement [Member] |  |
Disclosure of financial assets [line items] |  |
Assets | 344,520 | 221,030
Financial Assets Derivative Contracts Without Collateral Agreement [Member] |  |
Disclosure of financial assets [line items] |  |
Assets | $ 116,280 | $ 119,397

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