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FINANCIAL RISK MANAGEMENT - Allowances for Direct and Indirect Loan Losses and its Estimations (Details) - PEN (S/) S/ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure of financial risks management [Line Items] |  |  |  |
Allowance account for credit losses of financial assets | S/ 5,507,759 | S/ 5,314,531 | S/ 4,943,008 | S/ 4,416,692
Optimistic [Member] |  |  |  |
Disclosure of financial risks management [Line Items] |  |  |  |
Allowance account for credit losses of financial assets | 5,426,608 | 5,218,142 |  |
Base Case [Member] |  |  |  |
Disclosure of financial risks management [Line Items] |  |  |  |
Allowance account for credit losses of financial assets | 5,509,729 | 5,308,346 |  |
Pessimistic [Member] |  |  |  |
Disclosure of financial risks management [Line Items] |  |  |  |
Allowance account for credit losses of financial assets | S/ 5,584,965 | S/ 5,422,882 |  |

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- Definition The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2019-03-27 + Details
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