INVESTMENTS - The maturities and annual market rates of investments at fair value (Details )
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12 Months Ended |
Dec. 31, 2019 |
Dec. 31, 2018 |
| Corporate bonds |
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| Disclosure of Investments [Line Items] |
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| Description Of Maturity Of Financial Assets Classified Out Of Availableforsale Financial Assets |
Jan-2020 / Feb-2065
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Jan-2019 / Feb-2065
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| Certificates of deposit BCRP [Member] |
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| Disclosure of Investments [Line Items] |
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| Description Of Maturity Of Financial Assets Classified Out Of Availableforsale Financial Assets |
Jan-2020 / Jul-2021
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Jan-2019 / Jun-2020
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| Government Treasury Bonds [Member] |
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| Disclosure of Investments [Line Items] |
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| Description Of Maturity Of Financial Assets Classified Out Of Availableforsale Financial Assets |
Jan-2020 / Feb-2055
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Jan-2019 / Feb-2055
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| Securitization instruments [Member] |
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| Disclosure of Investments [Line Items] |
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| Description Of Maturity Of Financial Assets Classified Out Of Availableforsale Financial Assets |
May-2020 / Sep-2045
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Jun-2019 / Sep-2045
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| Negotiable certificates of deposits [Member] |
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| Disclosure of Investments [Line Items] |
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| Description Of Maturity Of Financial Assets Classified Out Of Availableforsale Financial Assets |
Jan-2020 / Dec 2026
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Jan-2019 / Dec-2026
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| Subordinated bonds |
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| Disclosure of Investments [Line Items] |
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| Description Of Maturity Of Financial Assets Classified Out Of Availableforsale Financial Assets |
Apr-2022 / Aug-2045
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Jan-2021 / Feb-2057
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| Others |
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| Disclosure of Investments [Line Items] |
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| Description Of Maturity Of Financial Assets Classified Out Of Availableforsale Financial Assets |
Jan-2020 / Jan-2028
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Oct-2019 / Jun-2021
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| The Soles [Member] | Bottom of range [member] | Corporate bonds |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
1.09%
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1.49%
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| The Soles [Member] | Bottom of range [member] | Certificates of deposit BCRP [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
2.02%
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2.59%
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| The Soles [Member] | Bottom of range [member] | Government Treasury Bonds [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.55%
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2.37%
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| The Soles [Member] | Bottom of range [member] | Securitization instruments [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
2.46%
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3.40%
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| The Soles [Member] | Bottom of range [member] | Negotiable certificates of deposits [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
3.27%
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4.54%
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| The Soles [Member] | Bottom of range [member] | Subordinated bonds |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
1.21%
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3.21%
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| The Soles [Member] | Bottom of range [member] | Others |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
1.95%
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4.24%
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| The Soles [Member] | Top of range [member] | Corporate bonds |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
8.16%
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11.90%
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| The Soles [Member] | Top of range [member] | Certificates of deposit BCRP [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
2.35%
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3.04%
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| The Soles [Member] | Top of range [member] | Government Treasury Bonds [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
5.31%
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6.50%
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| The Soles [Member] | Top of range [member] | Securitization instruments [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
13.26%
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14.81%
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| The Soles [Member] | Top of range [member] | Negotiable certificates of deposits [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
4.01%
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4.54%
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| The Soles [Member] | Top of range [member] | Subordinated bonds |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
5.52%
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7.41%
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| The Soles [Member] | Top of range [member] | Others |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
3.73%
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6.14%
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| US Dollars [Member] | Bottom of range [member] | Corporate bonds |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.47%
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1.16%
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| US Dollars [Member] | Bottom of range [member] | Certificates of deposit BCRP [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.00%
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0.00%
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| US Dollars [Member] | Bottom of range [member] | Government Treasury Bonds [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
1.11%
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1.22%
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| US Dollars [Member] | Bottom of range [member] | Securitization instruments [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
3.08%
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4.56%
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| US Dollars [Member] | Bottom of range [member] | Negotiable certificates of deposits [Member] |
|
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
2.48%
|
0.00%
|
| US Dollars [Member] | Bottom of range [member] | Subordinated bonds |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
3.27%
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3.60%
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| US Dollars [Member] | Bottom of range [member] | Others |
|
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
4.73%
|
0.00%
|
| US Dollars [Member] | Top of range [member] | Corporate bonds |
|
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
8.25%
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11.39%
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| US Dollars [Member] | Top of range [member] | Certificates of deposit BCRP [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.00%
|
0.00%
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| US Dollars [Member] | Top of range [member] | Government Treasury Bonds [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
4.61%
|
7.07%
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| US Dollars [Member] | Top of range [member] | Securitization instruments [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
9.14%
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6.85%
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| US Dollars [Member] | Top of range [member] | Negotiable certificates of deposits [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
2.68%
|
0.00%
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| US Dollars [Member] | Top of range [member] | Subordinated bonds |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
5.23%
|
7.26%
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| US Dollars [Member] | Top of range [member] | Others |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
6.92%
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0.00%
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| Other [Member] | Bottom of range [member] | Corporate bonds |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.62%
|
0.94%
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| Other [Member] | Bottom of range [member] | Certificates of deposit BCRP [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.00%
|
0.00%
|
| Other [Member] | Bottom of range [member] | Government Treasury Bonds [Member] |
|
|
| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.43%
|
0.60%
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| Other [Member] | Bottom of range [member] | Securitization instruments [Member] |
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| Disclosure of Investments [Line Items] |
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
1.68%
|
1.68%
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| Other [Member] | Bottom of range [member] | Negotiable certificates of deposits [Member] |
|
|
| Disclosure of Investments [Line Items] |
|
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
1.00%
|
1.40%
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| Other [Member] | Bottom of range [member] | Subordinated bonds |
|
|
| Disclosure of Investments [Line Items] |
|
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
1.53%
|
2.52%
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| Other [Member] | Bottom of range [member] | Others |
|
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| Disclosure of Investments [Line Items] |
|
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.00%
|
0.00%
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| Other [Member] | Top of range [member] | Corporate bonds |
|
|
| Disclosure of Investments [Line Items] |
|
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
6.55%
|
8.39%
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| Other [Member] | Top of range [member] | Certificates of deposit BCRP [Member] |
|
|
| Disclosure of Investments [Line Items] |
|
|
| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.00%
|
0.00%
|
| Other [Member] | Top of range [member] | Government Treasury Bonds [Member] |
|
|
| Disclosure of Investments [Line Items] |
|
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.82%
|
0.60%
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| Other [Member] | Top of range [member] | Securitization instruments [Member] |
|
|
| Disclosure of Investments [Line Items] |
|
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
6.00%
|
6.00%
|
| Other [Member] | Top of range [member] | Negotiable certificates of deposits [Member] |
|
|
| Disclosure of Investments [Line Items] |
|
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
4.98%
|
4.98%
|
| Other [Member] | Top of range [member] | Subordinated bonds |
|
|
| Disclosure of Investments [Line Items] |
|
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
1.53%
|
2.52%
|
| Other [Member] | Top of range [member] | Others |
|
|
| Disclosure of Investments [Line Items] |
|
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| Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |
0.00%
|
0.00%
|