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INVESTMENTS - Additional Information (Details) $ / shares in Units, S/ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 29, 2020 item $ / shares shares | Dec. 31, 2020 PEN (S/) item shares | Dec. 31, 2019 PEN (S/) item | Dec. 31, 2020 USD ($) item | Dec. 31, 2020 PEN (S/) item | Dec. 31, 2019 USD ($) item | Dec. 31, 2019 PEN (S/) item | Jul. 30, 2019 USD ($)
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Individual unrealized loss |  | S/ 13,000 | S/ 1,500 |  |  |  |  |
Credit derivative, nominal amount |  |  |  |  | S/ 54,844,606 |  | S/ 69,720,506 |
Non-current financial assets at fair value through profit or loss |  |  |  |  | 6,467,471 |  | 3,850,762 |
Estimated fair value |  |  |  |  | 42,831,258 |  | 25,370,413 |
Dividends received |  | 2,674,400 | 3,610,700 |  |  |  |  |
Financial assets at amortised cost |  |  |  |  | 2,196,220 |  | 1,907,738 |
Provision of credit loss |  | S/ 52,300 |  |  |  |  |  |
Recovery of credit loss |  |  | S/ 700 |  |  |  |  |
Financial Assets Maturity Date Description |  | January 2021 and April 2026 | January 2020 and April 2026 |  |  |  |  |
Peruvian company Rutas de Lima S.A.C |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Individual unrealized loss |  | S/ 40,500 |  |  |  |  |  |
Peru |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Percentage of corporate bonds issued |  | 43.60% | 51.70% |  |  |  |  |
United States |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Percentage of corporate bonds issued |  | 32.30% | 26.80% |  |  |  |  |
Colombia |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Percentage of corporate bonds issued |  | 4.60% | 3.60% |  |  |  |  |
Other countries |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Percentage of corporate bonds issued |  | 19.50% | 17.90% |  |  |  |  |
Repurchase Agreement [Member] |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Investments in equity instruments designated at fair value through other comprehensive income |  |  |  |  | S/ 997,800 |  | S/ 1,588,700 |
Certificates of payment on work progress [Member] | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | 2.42% | 2.42% | 3.74% | 3.74% |
Certificates of payment on work progress [Member] | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | 3.47% | 3.47% | 4.67% | 4.67% |
Financial assets at amortised cost, class [member] |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Notional amount | $ |  |  |  |  |  |  |  | $ 2,117,500.000
Financial assets at amortised cost | $ |  |  |  |  |  |  |  | 73,030,400
Financial assets, at fair value |  |  |  |  | S/ 2,766,200 |  | S/ 1,569,300 | 75,147,900
Credit exposure | $ |  |  |  |  |  |  |  | $ 82,400.000
Participation in Credicorp Capital Latin American Corporate Debt Fund |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Non-current financial assets at fair value through profit or loss |  |  |  |  | 135,500 |  |  |
Participation in Credicorp Capital Latin American Investment Grade Fund |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Non-current financial assets at fair value through profit or loss |  |  |  |  | 99,400 |  |  |
Participation in Royalty Pharma plc |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Non-current financial assets at fair value through profit or loss |  |  |  | $ 37,900,000 | 137,200 |  |  |
Investment in number of shares | shares |  | 757,692 |  |  |  |  |  |
Participation inFondo de Inversin Colectiva Fonval |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Non-current financial assets at fair value through profit or loss |  |  |  |  | 35,500 |  |  |
Participation in Fondo de capital privado 4G Credicorp Capital |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Non-current financial assets at fair value through profit or loss |  |  |  |  | S/ 49,000 |  |  |
The Soles [Member] | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | 0.74% | 0.74% | 2.14% | 2.14% |
The Soles [Member] | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | 5.06% | 5.06% | 5.28% | 5.28% |
US Dollars [Member] | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | 0.00% | 0.00% | 0.45% | 0.45% |
US Dollars [Member] | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | 3.05% | 3.05% | 2.53% | 2.53% |
US Dollars [Member] | Participation in RAL Fund [Member] |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Estimated fair value |  |  |  |  | S/ 105,600 |  | S/ 133,500 |
Bolivianos [Member] | Participation in RAL Fund [Member] |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Estimated fair value |  |  |  |  | S/ 173,200 |  | S/ 166,900 |
Certificates of deposit BCRP |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Number of instruments or interests issued or issuable | item |  |  |  | 5,174 | 5,174 | 87,530 | 87,530 |
Certificates of deposits |  |  |  | $ 517,230,000 | S/ 1,872,900 |  |  |
Number of certificates of deposits | item |  | 153,760 |  |  |  |  |  |
Non-current financial assets at fair value through profit or loss |  |  |  |  | 1,872,875 |  | S/ 0 |
Estimated fair value |  |  |  |  | 15,364,282 |  | S/ 8,665,272 |
Balance of investment | $ |  |  |  | $ 6,650,000 |  |  |  |
Certificates of deposit BCRP | Colombia |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Balance of investment |  |  |  |  | 24,100 |  |  |
Certificates of deposit BCRP | Bolivia |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Balance of investment |  |  |  |  | S/ 861,800 |  |  |
Certificates of deposit BCRP | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | 0.25% | 0.25% |  |  |
Certificates of deposit BCRP | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | 0.28% | 0.28% |  |  |
Certificates of deposit BCRP | Currency swaps | Cash flow hedges |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Certificates of deposits |  |  |  |  | S/ 405,200 |  |  |
Certificates of deposit BCRP | The Soles [Member] | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | 0.25% | 0.25% | 2.02% | 2.02% |
Certificates of deposit BCRP | The Soles [Member] | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | 0.73% | 0.73% | 2.35% | 2.35% |
Government Treasury Bonds |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Non-current financial assets at fair value through profit or loss |  |  |  |  | S/ 1,584,913 |  | S/ 1,276,573 |
Estimated fair value |  |  |  |  | S/ 12,205,049 |  | S/ 6,698,076 |
Government Treasury Bonds | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Percentage of effective annual interest rate excluding bonds interest rate |  |  |  | 0.16% | 0.16% |  |  |
Government Treasury Bonds | The Soles [Member] | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | (1.20%) | (1.20%) | 0.55% | 0.55% |
Government Treasury Bonds | The Soles [Member] | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | 5.08% | 5.08% | 5.31% | 5.31% |
Government Treasury Bonds | US Dollars [Member] | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | 0.03% | 0.03% | 1.11% | 1.11% |
Government Treasury Bonds | US Dollars [Member] | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | 4.61% | 4.61% | 4.61% | 4.61% |
Derivatives held as hedges [Member] |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Credit derivative, nominal amount |  |  |  |  | S/ 2,811,888 |  | S/ 6,270,638 |
Derivatives held as hedges [Member] | Cross currency swap contract four [Member] | Cash flow hedges |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Credit derivative, nominal amount |  |  |  |  | 90,525 |  | 82,850 |
Derivatives held as hedges [Member] | Cross currency swap contract five [Member] | Cash flow hedges |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Credit derivative, nominal amount |  |  |  |  | 0 |  | 231,980 |
Derivatives held as hedges [Member] | Cross currency swap contract five [Member] | Fair value hedges [member] |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Credit derivative, nominal amount |  |  |  |  | 628,700 |  | 618,800 |
Derivatives held as hedges [Member] | Interest rate swap contract six [Member] | Cash flow hedges |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Credit derivative, nominal amount |  |  |  |  | 0 |  | 994,200 |
Derivatives held as hedges [Member] | Cross currency swap contract [Member] | Cash flow hedges |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Credit derivative, nominal amount |  |  |  |  | 487,046 |  | 107,425 |
Amortized cost [Member] |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Balance of investment |  |  |  |  | S/ 4,858,279 |  | 3,399,133 |
Bonds issued by JP Morgan Chase & Co. and Cineplex S.A | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Percentage of effective annual interest rate excluding bonds interest rate |  |  |  | 0.01% | 0.01% |  |  |
Bonds issued by JP Morgan Chase & Co. and Cineplex S.A | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Percentage of effective annual interest rate excluding bonds interest rate |  |  |  | 14.31% | 14.31% |  |  |
Bonds issued by JP Morgan Chase & Co. |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | (0.31%) | (0.31%) |  |  |
Bonds issued by Cineplex S.A |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | 16.21% | 16.21% |  |  |
Bond issued by the Peruvian Treasury |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | (1.20%) | (1.20%) |  |  |
Corporate bonds |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Non-current financial assets at fair value through profit or loss |  |  |  |  | S/ 328,315 |  | 326,673 |
Corporate bonds | Currency swaps | Cash flow hedges |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Credit derivative, nominal amount |  |  |  |  | S/ 81,800 |  | S/ 107,400 |
Corporate bonds | The Soles [Member] | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | (0.31%) | (0.31%) | 1.09% | 1.09% |
Corporate bonds | The Soles [Member] | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | 16.21% | 16.21% | 8.16% | 8.16% |
Corporate bonds | US Dollars [Member] | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | 0.01% | 0.01% | 0.47% | 0.47% |
Corporate bonds | US Dollars [Member] | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Effective Interest Rate Of Financial Assets Classified Out Of Availableforsale Financial Assets |  |  |  | 10.51% | 10.51% | 8.25% | 8.25% |
RPI International Holding, LP |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Non-current financial assets at fair value through profit or loss |  |  |  | $ 1,550,000 | S/ 5,641 | $ 20,700,000 | S/ 68,584 |
Investment in number of shares | shares | 973,545 |  |  |  |  |  |  |
Number of participations | item | 97,355 | 7,594 | 112,187 |  |  |  |  |
Unit price of participations | $ / shares | $ 205.10 |  |  |  |  |  |  |
Unit price of shares | $ / shares | $ 20.51 |  |  |  |  |  |  |
Peruvian sovereign bonds [Member] |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Financial Assets Maturity Date Description |  | January 2023 to February 2055 |  |  |  |  |  |
Peruvian sovereign bonds [Member] | Minimum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | (1.20%) | (1.20%) |  |  |
Peruvian sovereign bonds [Member] | Maximum |  |  |  |  |  |  |  |
Disclosure of Investments [Line Items] |  |  |  |  |  |  |  |
Annual effective interest rate of held to maturity investments |  |  |  | 5.08% | 5.08% |  |  |

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