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ISSUED DEBT INSTRUMENTS AND OTHER FINANCIAL LIABILITIES (Details) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of financial liabilities [line items] |  |
Subtotals | $ 215,400 | $ 242,030
Subtotals | 8,115,233 | 7,093,653
Issued debt instruments and other financial liabilities | 8,330,633 | 7,335,683
Mortgage Finance Bonds [Member] |  |
Disclosure of financial liabilities [line items] |  |
Subtotals | 25,490 | 34,479
Senior Bonds [Member] |  |
Disclosure of financial liabilities [line items] |  |
Subtotals | 7,198,865 | 6,186,760
Mortgage Bonds [Member] |  |
Disclosure of financial liabilities [line items] |  |
Subtotals | 94,921 | 99,222
Subordinated Bonds [Member] |  |
Disclosure of financial liabilities [line items] |  |
Subtotals | 795,957 | 773,192
Obligations To Public Sector [Member] |  |
Disclosure of financial liabilities [line items] |  |
Subtotals | 32,449 | 59,470
Other Domestic Obligations [Member] |  |
Disclosure of financial liabilities [line items] |  |
Subtotals | 175,210 | 175,389
Foreign Obligations [Member] |  |
Disclosure of financial liabilities [line items] |  |
Subtotals | $ 7,741 | $ 7,171

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