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Loans to Customers, net - Allowance for loan losses associated with impaired loans and with non-impaired loans (Details) $ in Thousands, $ in Millions | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CLP ($) | Dec. 31, 2016 CLP ($) | Dec. 31, 2015 CLP ($) | Dec. 31, 2014 CLP ($)
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Allowances for impaired loans associated with impaired loans and with non-impaired loans |  |  |  |  |
Total allowances for loan losses | $ (40,550,009) | $ (24,955,692) | $ (24,843,655) | $ (24,022,983) |
Accumulated Amortization and Impairment |  |  |  |  |
Allowances for impaired loans associated with impaired loans and with non-impaired loans |  |  |  |  |
Provision for not yet identified but incurred impairment |  | (247,119) | (255,353) |  |
Total allowances for loan losses |  | 495,821 | 554,769 | 550,443 |
Accumulated Amortization and Impairment | Total provision |  |  |  |  |
Allowances for impaired loans associated with impaired loans and with non-impaired loans |  |  |  |  |
Allowances for impaired loans |  | (248,702) | (299,416) |  |
Total allowances for loan losses |  | 495,821 | 554,769 | 550,443 | $ 490,558
Accumulated Amortization and Impairment | Individual Provision |  |  |  |  |
Allowances for impaired loans associated with impaired loans and with non-impaired loans |  |  |  |  |
Allowances for impaired loans |  | (57,486) | (106,456) |  |
Total allowances for loan losses |  | 110,722 | 164,662 | 212,424 |
Accumulated Amortization and Impairment | Group Provision |  |  |  |  |
Allowances for impaired loans associated with impaired loans and with non-impaired loans |  |  |  |  |
Allowances for impaired loans |  | (191,216) | (192,960) |  |
Total allowances for loan losses |  | $ 385,099 | $ 390,107 | $ 338,019 |

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- Definition The amount of allowances for impaired loans + References No definition available. + Details
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- Definition The amount of provision of impairment loss on financial assets not yet identified. + References No definition available. + Details
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- Definition The amount of loans and advances the entity has made to customers. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard -URIDate 2017-03-09 + Details
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