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Loans to Customers at Amortized Cost - Financial Lease Contracts (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of maturity analysis of finance lease payments receivable [line items] |  |  |
Total receivable |  | $ 1,802,964 | $ 1,765,815
Unearned income |  | (190,418) | (200,151)
Net lease receivable | [1] | 1,612,546 | 1,565,664
Due within one year |  |  |
Disclosure of maturity analysis of finance lease payments receivable [line items] |  |  |
Total receivable |  | 544,067 | 519,186
Unearned income |  | (58,871) | (60,216)
Net lease receivable | [1] | 485,196 | 458,970
Due after 1 year but within 2 years |  |  |
Disclosure of maturity analysis of finance lease payments receivable [line items] |  |  |
Total receivable |  | 392,832 | 383,164
Unearned income |  | (42,302) | (44,066)
Net lease receivable | [1] | 350,530 | 339,098
Due after 2 years but within 3 years |  |  |
Disclosure of maturity analysis of finance lease payments receivable [line items] |  |  |
Total receivable |  | 258,331 | 255,997
Unearned income |  | (27,329) | (28,740)
Net lease receivable | [1] | 231,002 | 227,257
Due after 3 years but within 4 years |  |  |
Disclosure of maturity analysis of finance lease payments receivable [line items] |  |  |
Total receivable |  | 163,847 | 162,310
Unearned income |  | (18,361) | (19,471)
Net lease receivable | [1] | 145,486 | 142,839
Due after 4 years but within 5 years |  |  |
Disclosure of maturity analysis of finance lease payments receivable [line items] |  |  |
Total receivable |  | 108,192 | 108,453
Unearned income |  | (13,242) | (13,992)
Net lease receivable | [1] | 94,950 | 94,461
Due after 5 years |  |  |
Disclosure of maturity analysis of finance lease payments receivable [line items] |  |  |
Total receivable |  | 335,695 | 336,705
Unearned income |  | (30,313) | (33,666)
Net lease receivable | [1] | $ 305,382 | $ 303,039
[1] | The net balance receivable does not include the total overdue portfolio totaling Ch$6,344 million and Ch$7,295 million as of December 31, 2018 and 2019, respectively. This overdue portfolio only reflects the past due portion without considering the remaining outstanding principal and interest.

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- Definition The gross investment in the finance lease discounted at the interest rate implicit in the lease. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset. Gross investment in the finance lease is the sum of: (a) the lease payments receivable by a lessor under a finance lease; and (b) any unguaranteed residual value accruing to the lessor. Interest rate implicit in the lease is the rate of interest that causes the present value of (a) the lease payments and (b) the unguaranteed residual value to equal to the sum of (i) the fair value of the underlying asset and (ii) the initial direct costs of the lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 94 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_94&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of unearned finance income relating to the finance lease payments receivable. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset. [Refer: Finance income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 94 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_94&doctype=Standard -URIDate 2019-03-27 + Details
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