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RISK MANAGEMENT (Details 3) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | $ 30,213,414 |
Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 26,913,508 |
Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,796,790 |
Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,503,116 |
Commercial Loans [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 15,186,144 | $ 13,800,408
Commercial Loans [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 13,312,806 |
Commercial Loans [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,100,255 |
Commercial Loans [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 773,083 |
Mortgage Loans [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 10,150,981 | 9,096,895
Mortgage Loans [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 9,258,962 |
Mortgage Loans [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 447,496 |
Mortgage Loans [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 444,523 |
Consumer Loans [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 4,876,289 | $ 4,557,692
Consumer Loans [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 4,341,740 |
Consumer Loans [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 249,039 |
Consumer Loans [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 285,510 |
Market Risk [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 30,213,414 |
Market Risk [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 26,913,508 |
Market Risk [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,796,790 |
Market Risk [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,503,116 |
Market Risk [Member] | Commercial Loans [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 15,186,144 |
Market Risk [Member] | Commercial Loans [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 13,312,806 |
Market Risk [Member] | Commercial Loans [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,100,255 |
Market Risk [Member] | Commercial Loans [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 773,083 |
Market Risk [Member] | Commercial Loans [Member] | Manufacturing [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,139,765 |
Market Risk [Member] | Commercial Loans [Member] | Manufacturing [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 992,786 |
Market Risk [Member] | Commercial Loans [Member] | Manufacturing [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 92,931 |
Market Risk [Member] | Commercial Loans [Member] | Manufacturing [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 54,048 |
Market Risk [Member] | Commercial Loans [Member] | Mining [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 208,748 |
Market Risk [Member] | Commercial Loans [Member] | Mining [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 182,342 |
Market Risk [Member] | Commercial Loans [Member] | Mining [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 21,821 |
Market Risk [Member] | Commercial Loans [Member] | Mining [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 4,585 |
Market Risk [Member] | Commercial Loans [Member] | Electricity, Gas and Water [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 408,932 |
Market Risk [Member] | Commercial Loans [Member] | Electricity, Gas and Water [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 384,288 |
Market Risk [Member] | Commercial Loans [Member] | Electricity, Gas and Water [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 22,365 |
Market Risk [Member] | Commercial Loans [Member] | Electricity, Gas and Water [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 2,279 |
Market Risk [Member] | Commercial Loans [Member] | Agriculture and Livestock [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,201,251 |
Market Risk [Member] | Commercial Loans [Member] | Agriculture and Livestock [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 934,199 |
Market Risk [Member] | Commercial Loans [Member] | Agriculture and Livestock [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 166,271 |
Market Risk [Member] | Commercial Loans [Member] | Agriculture and Livestock [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 100,781 |
Market Risk [Member] | Commercial Loans [Member] | Forest [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 143,888 |
Market Risk [Member] | Commercial Loans [Member] | Forest [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 120,371 |
Market Risk [Member] | Commercial Loans [Member] | Forest [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 9,402 |
Market Risk [Member] | Commercial Loans [Member] | Forest [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 14,115 |
Market Risk [Member] | Commercial Loans [Member] | Fishing [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 253,021 |
Market Risk [Member] | Commercial Loans [Member] | Fishing [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 238,348 |
Market Risk [Member] | Commercial Loans [Member] | Fishing [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 11,104 |
Market Risk [Member] | Commercial Loans [Member] | Fishing [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 3,569 |
Market Risk [Member] | Commercial Loans [Member] | Transportation [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 809,306 |
Market Risk [Member] | Commercial Loans [Member] | Transportation [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 716,493 |
Market Risk [Member] | Commercial Loans [Member] | Transportation [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 55,011 |
Market Risk [Member] | Commercial Loans [Member] | Transportation [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 37,802 |
Market Risk [Member] | Commercial Loans [Member] | Communications [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 215,844 |
Market Risk [Member] | Commercial Loans [Member] | Communications [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 178,215 |
Market Risk [Member] | Commercial Loans [Member] | Communications [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 30,407 |
Market Risk [Member] | Commercial Loans [Member] | Communications [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 7,222 |
Market Risk [Member] | Commercial Loans [Member] | Construction [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances | [1] | 906,038 |
Market Risk [Member] | Commercial Loans [Member] | Construction [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances | [1] | 723,600 |
Market Risk [Member] | Commercial Loans [Member] | Construction [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances | [1] | 88,691 |
Market Risk [Member] | Commercial Loans [Member] | Construction [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances | [1] | 93,747 |
Market Risk [Member] | Commercial Loans [Member] | Commerce Industry [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 3,340,064 |
Market Risk [Member] | Commercial Loans [Member] | Commerce Industry [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 2,950,517 |
Market Risk [Member] | Commercial Loans [Member] | Commerce Industry [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 189,623 |
Market Risk [Member] | Commercial Loans [Member] | Commerce Industry [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 199,924 |
Market Risk [Member] | Commercial Loans [Member] | Services [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,865,669 |
Market Risk [Member] | Commercial Loans [Member] | Services [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 1,771,595 |
Market Risk [Member] | Commercial Loans [Member] | Services [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 81,159 |
Market Risk [Member] | Commercial Loans [Member] | Services [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 12,915 |
Market Risk [Member] | Commercial Loans [Member] | Other [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 4,693,618 |
Market Risk [Member] | Commercial Loans [Member] | Other [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 4,120,052 |
Market Risk [Member] | Commercial Loans [Member] | Other [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 331,470 |
Market Risk [Member] | Commercial Loans [Member] | Other [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 242,096 |
Market Risk [Member] | Mortgage Loans [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 10,150,981 |
Market Risk [Member] | Mortgage Loans [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 9,258,962 |
Market Risk [Member] | Mortgage Loans [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 447,496 |
Market Risk [Member] | Mortgage Loans [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 444,523 |
Market Risk [Member] | Consumer Loans [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 4,876,289 |
Market Risk [Member] | Consumer Loans [Member] | Stage 1 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 4,341,740 |
Market Risk [Member] | Consumer Loans [Member] | Stage 2 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | 249,039 |
Market Risk [Member] | Consumer Loans [Member] | Stage 3 [Member] |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |
Assets before allowances |  | $ 285,510 |
[1] | In 2018 we improved the classification of our construction loans, reassigning loans for real state rental investment companies to services.

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