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REPORTING SEGMENTS (Details) - CLP ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of operating segments [line items] |  |  |  |  |  |  |
Loans and accounts receivable at amortised cost |  |  |  | $ 26,772,544 |  |  |
Net interest income |  | 1,414,368 |  | 1,326,691 |  | $ 1,281,366 |
Net fee and commission income |  | 484,463 |  | 455,558 |  | 431,184 |
Expected credit losses |  | 317,408 |  | 302,255 |  | 342,083 |
Other operating income |  | 23,129 |  | 62,016 |  | 6,427 |
Income from investments in associates and other companies |  | 5,095 |  | 3,963 |  | 3,012 |
Income tax expense |  | 167,144 |  | 145,031 |  | 109,031 |
Net income for the year |  | 599,693 |  | 575,249 |  | 478,432 |
Retail Banking [Member] |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |
Loans and accounts receivable at amortised cost |  | 20,786,637 | [1] | 19,233,169 | [2] | 18,604,936 | [2]
Net interest income |  | 949,764 |  | 970,332 |  | 931,105 |
Net fee and commission income |  | 220,532 |  | 206,449 |  | 196,845 |
Financial transactions, net | [3] | 19,694 |  | 20,595 |  | 21,141 |
Expected credit losses |  | (287,739) |  | (293,956) |  | (323,888) |
Support expenses | [4] | (553,157) |  | (534,970) |  | (529,909) |
Segment`s net contribution |  | 349,094 |  | 368,450 |  | 295,294 |
Middle Market [Member] |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |
Loans and accounts receivable at amortised cost |  | 7,690,380 | [1] | 6,775,734 | [2] | 6,396,376 | [2]
Net interest income |  | 272,912 |  | 264,663 |  | 244,960 |
Net fee and commission income |  | 36,746 |  | 36,280 |  | 30,851 |
Financial transactions, net | [3] | 16,848 |  | 13,751 |  | 19,577 |
Expected credit losses |  | (26,314) |  | (19,235) |  | (26,748) |
Support expenses | [4] | (92,377) |  | (91,882) |  | (83,412) |
Segment`s net contribution |  | 207,815 |  | 203,577 |  | 185,228 |
Commercial Banking [Member] |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |
Loans and accounts receivable at amortised cost |  | 28,477,017 | [1] | 26,008,903 | [2] | 25,001,312 | [2]
Net interest income |  | 1,222,676 |  | 1,234,995 |  | 1,176,065 |
Net fee and commission income |  | 257,278 |  | 242,729 |  | 227,696 |
Financial transactions, net | [3] | 36,542 |  | 34,346 |  | 40,718 |
Expected credit losses |  | (314,053) |  | (313,191) |  | (350,636) |
Support expenses | [4] | (645,534) |  | (626,852) |  | (613,321) |
Segment`s net contribution |  | 556,909 |  | 572,027 |  | 480,522 |
Global Corporate Banking [Member] |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |
Loans and accounts receivable at amortised cost |  | 1,613,088 | [1] | 1,633,796 | [2] | 2,121,513 | [2]
Net interest income |  | 96,722 |  | 100,808 |  | 95,105 |
Net fee and commission income |  | 35,064 |  | 27,626 |  | 25,077 |
Financial transactions, net | [3] | 57,340 |  | 50,714 |  | 55,927 |
Expected credit losses |  | 2,339 |  | 6,440 |  | 7,579 |
Support expenses | [4] | (64,913) |  | (62,685) |  | (53,935) |
Segment`s net contribution |  | 126,552 |  | 122,903 |  | 129,753 |
Other [Member] |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |
Loans and accounts receivable at amortised cost |  | 123,309 | [1] | 83,215 | [2] | 83,606 | [2]
Net interest income |  | 94,970 |  | (9,112) |  | 10,196 |
Net fee and commission income |  | (1,457) |  | 8,708 |  | 1,651 |
Financial transactions, net | [3] | 11,200 |  | 44,692 |  | 43,713 |
Expected credit losses |  | (5,694) |  | 4,496 |  | 974 |
Support expenses | [4] | (11,486) |  | (15,356) |  | (19,649) |
Segment`s net contribution |  | 87,533 |  | 33,428 |  | 36,885 |
Total [Member] |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |
Loans and accounts receivable at amortised cost |  | 30,213,414 | [1] | 27,725,914 | [2] | 27,206,431 | [2]
Net interest income |  | 1,414,368 |  | 1,326,691 |  | 1,281,366 |
Net fee and commission income |  | 290,885 |  | 279,063 |  | 254,424 |
Financial transactions, net | [3] | 105,082 |  | 129,752 |  | 140,358 |
Expected credit losses |  | (317,408) |  | (302,255) |  | (342,083) |
Support expenses | [4] | (721,933) |  | (704,893) |  | (686,905) |
Segment`s net contribution |  | 770,994 |  | 728,358 |  | 647,160 |
Other operating income |  | 23,129 |  | 62,016 |  | 6,427 |
Other operating expenses and impairment |  | (32,381) |  | (74,057) |  | (69,136) |
Income from investments in associates and other companies |  | 5,095 |  | 3,963 |  | 3,012 |
Income tax expense |  | (167,144) |  | (145,031) |  | (109,031) |
Net income for the year |  | $ 599,693 |  | $ 575,249 |  | $ 478,432 |
[1] | Corresponds to loans and accounts receivable at amortised cost under IFRS 9, without deducting their allowances for loan losses.
[2] | Corresponds to loans and accounts receivable from customers, without deducting their allowances for loan losses.
[3] | Corresponds to the sum of the net income from financial operations and the foreign exchange profit or loss.
[4] | Corresponds to the sum of personnel salaries and expenses, administrative expenses, depreciation and amortization.

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