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DEBT INSTRUMENTS AT FAIR VALUE THROUGH OTHER COMPREHENSIVE INCOME (Details) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | $ 2,394,323 |
Other Chilean Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 24,827 |
Foreign Financial Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 448,460 |
Securities Sold Under Repurchase Agreements [Member] | Other Chilean Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 32,436 |
Securities Sold Under Repurchase Agreements [Member] | Foreign Financial Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income |  |
Time Deposits In Chilean Financial Institutions [Member] | Other Chilean Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 2,693 |
Mortgage Finance Bonds Of Chilean Financial Institutions [Member] | Other Chilean Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 19,227 |
Other Instruments Issued in The Country [Member] | Other Chilean Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 2,907 |
Foreign Central Banks And Government Securities [Member] | Foreign Financial Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 280,622 |
Other Foreign Financial Instruments [Member] | Foreign Financial Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 167,838 |
Chilean Central Bank And Government Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 1,921,036 |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 657,096 |
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 56,719 |
Chilean Central Bank And Government Securities [Member] | Other Chilean Central Bank And Government Securities [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | 1,207,221 |
Chilean Central Bank And Government Securities [Member] | Securities Sold Under Repurchase Agreements [Member] |  |
Disclosure of financial assets [line items] |  |
Debt instruments at fair value through other comprehensive income | $ 16,109 |

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- Definition The amount of financial assets that are measured at fair value through other comprehensive income. A financial asset shall be measured at fair value through other comprehensive income if both of the following conditions are met: (a) the financial asset is held within a business model whose objective is achieved by both collecting contractual cash flows and selling financial assets and (b) the contractual terms of the financial asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 8 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_8_h&doctype=Standard -URIDate 2018-03-16 + Details
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