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Reporting Segments (Details) - CLP ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |
Net interest income |  | $ 1,416,964 | $ 1,414,368 |  | $ 1,326,691 |  |  |
Net fee and commission income |  | 498,658 | 484,463 |  | 455,558 |  |  |
Expected credit losses |  | 323,311 | 317,408 |  | 302,255 |  |  |
Other operating income |  | 13,001 | 23,129 |  | 62,016 |  |  |
Income from investments in associates and other companies |  | 1,146 | 1,324 |  | 1,144 |  |  |
Income tax expense |  | 175,074 | 167,144 |  | 145,031 |  |  |
Net income for the year |  | 621,313 | 599,693 |  | 575,249 |  |  |
Companies And Institutions [Member] |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |
Net fee and commission income |  | 47,710 | 44,696 |  |  |  |  |
GlobalCorporateBanking1[Member] |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |
Net fee and commission income |  | 35,358 | 40,953 |  |  |  |  |
OthersSegmentMember |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |
Net fee and commission income |  | 9,754 |  |  |  |  |  |
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 |  | (279,969) | (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 |  | (38,746) | (19,235) |  | (26,748) |  |  |
Support expenses | [4] | (92,377) | (91,882) |  | (83,412) |  |  |
Segment`s net contribution |  | 207,815 | 203,577 |  | 185,228 |  |  |
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 |  | 224 | 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 |  | (6,582) | 9,754 |  | 1,651 |  |  |
Financial transactions, net | [3] | 11,200 | 44,692 |  | 43,713 |  |  |
Expected credit losses |  | (4,819) | 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 |  | 498,658 | 311,157 |  | 254,424 |  |  |
Financial transactions, net | [3] | 105,082 | 129,752 |  | 140,358 |  |  |
Expected credit losses |  | (323,311) | (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 |  |  |
Individuals And PYMEs [Member] |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |
Net fee and commission income |  | $ 422,172 | $ 389,060 |  |  |  |  |
Commercial Banking [Member] |  |  |  |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |  |  |  |
Loans and accounts receivable at amortised cost | [2] |  |  |  |  |  | $ 25,001,312 |
Net interest income |  |  |  |  | 1,176,065 |  |  |
Net fee and commission income |  |  |  |  | 227,696 |  |  |
Financial transactions, net | [3] |  |  |  | 40,718 |  |  |
Expected credit losses |  |  |  |  | (350,636) |  |  |
Support expenses | [4] |  |  |  | (613,321) |  |  |
Segment`s net contribution |  |  |  |  | $ 480,522 |  |  |
[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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