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Loans to Customers at Amortized Cost - Loans by industry sector (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 29,384,039 | $ 27,341,254
Commercial Loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | 16,039,411 | 15,209,534
Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | 9,163,019 | 8,017,743
Consumer Loans [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | 4,181,609 | 4,113,977
Gross Carrying Amount |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 30,033,272 | $ 27,926,632
% | 100.00% | 100.00%
Gross Carrying Amount | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 93,544 | $ 27,833,088
Gross Carrying Amount | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | 14,685 | 93,544
Gross Carrying Amount | Financial Services [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 2,587,559 | $ 2,122,599
% | 8.62% | 7.60%
Gross Carrying Amount | Financial Services [Member] | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 2,784 | $ 2,119,815
Gross Carrying Amount | Financial Services [Member] | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | 3,060 | 2,784
Gross Carrying Amount | Services |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 2,267,869 | $ 2,109,491
% | 7.55% | 7.55%
Gross Carrying Amount | Services | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 348 | $ 2,109,143
Gross Carrying Amount | Services | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | 436 | 348
Gross Carrying Amount | Construction |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 2,142,699 | $ 1,752,237
% | 7.13% | 6.27%
Gross Carrying Amount | Construction | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | $ 1,752,237
Gross Carrying Amount | Construction | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  |
Gross Carrying Amount | Commerce Sector [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 2,066,372 | $ 2,324,325
% | 6.88% | 8.32%
Gross Carrying Amount | Commerce Sector [Member] | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 38,430 | $ 2,285,895
Gross Carrying Amount | Commerce Sector [Member] | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | 11,189 | 38,430
Gross Carrying Amount | Manufacturing |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 1,624,972 | $ 1,579,475
% | 5.41% | 5.66%
Gross Carrying Amount | Manufacturing | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 34,613 | $ 1,544,862
Gross Carrying Amount | Manufacturing | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | 34,613
Gross Carrying Amount | Agriculture and livestock |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 1,623,465 | $ 1,582,520
% | 5.41% | 5.67%
Gross Carrying Amount | Agriculture and livestock | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | $ 1,582,520
Gross Carrying Amount | Agriculture and livestock | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  |
Gross Carrying Amount | Transportation and telecommunications |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 1,234,087 | $ 1,498,142
% | 4.11% | 5.37%
Gross Carrying Amount | Transportation and telecommunications | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 17,369 | $ 1,480,773
Gross Carrying Amount | Transportation and telecommunications | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | 17,369
Gross Carrying Amount | Mining Sector [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 604,660 | $ 453,549
% | 2.01% | 1.62%
Gross Carrying Amount | Mining Sector [Member] | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | $ 453,549
Gross Carrying Amount | Mining Sector [Member] | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  |
Gross Carrying Amount | Water Sector [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 325,143 | $ 461,351
% | 1.08% | 1.65%
Gross Carrying Amount | Water Sector [Member] | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | $ 461,351
Gross Carrying Amount | Water Sector [Member] | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  |
Gross Carrying Amount | Fishing Sector [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 140,709 | $ 156,472
% | 0.47% | 0.56%
Gross Carrying Amount | Fishing Sector [Member] | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | $ 156,472
Gross Carrying Amount | Fishing Sector [Member] | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  |
Gross Carrying Amount | Other Sector [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 1,676,677 | $ 1,398,237
% | 5.58% | 5.01%
Gross Carrying Amount | Other Sector [Member] | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | $ 1,398,237
Gross Carrying Amount | Other Sector [Member] | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  |
Gross Carrying Amount | Commercial Loans |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 16,294,212 | $ 15,438,398
% | 54.25% | 55.28%
Gross Carrying Amount | Commercial Loans | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 30,018,587 | $ 15,344,854
Gross Carrying Amount | Commercial Loans | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | 14,685 | 93,544
Gross Carrying Amount | Mortgages |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 9,206,727 | $ 8,052,073
% | 30.66% | 28.83%
Gross Carrying Amount | Mortgages | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | $ 8,052,073
Gross Carrying Amount | Mortgages | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  |
Gross Carrying Amount | Consumer Loans [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers | $ 4,532,333 | $ 4,436,161
% | 15.09% | 15.89%
Gross Carrying Amount | Consumer Loans [Member] | Country Of Domicile [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  | $ 4,436,161
Gross Carrying Amount | Consumer Loans [Member] | Foreign countries [Member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans to customers |  |

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