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LOANS AND ACCOUNTS RECEIVABLE FROM CUSTOMERS and INTERBANK LOANS (under IAS 39) (Details 9) - CLP ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure of financial assets [line items] |  |
Total | $ 83,315 | $ 78,298
Commercial Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Total | 32,401 | 27,185
Consumer Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Total | 39,972 | 41,072
Mortgage Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Total | $ 10,942 | $ 10,041

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- Definition Represent information about recoveries of loans. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_ConsumerLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_MortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |