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CASH AND CASH EQUIVALENTS (Details textual) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 PEN (S/) | Dec. 31, 2017 USD ($) | Dec. 31, 2016
Disclosure Of Cash And Cash Equivalents [Line Items] |  |  |
Implicit interest rate, domestic | 5.00% | 5.00% | 6.50%
Implicit interest rate, foreign | 32.40% | 32.40% | 25.89%
Overnight deposit one | S/ 2,916,900 |  |
Overnight deposit two | 150,900 |  |
Overnight deposit three | S/ 300,000 |  |
Interest rate on overnight deposits | 2.00% | 2.00% |
Description of maturity of overnight deposits | maturities at 5 days |  |
US Dollars [Member] |  |  |
Disclosure Of Cash And Cash Equivalents [Line Items] |  |  |
Overnight deposit one | $ |  | $ 900,000 |
Overnight deposit two | $ |  | $ 46,600 |
Interest rate on overnight deposits | 1.41% | 1.41% |

X
- Definition The description of maturity of overnight deposits. + References No definition available. + Details
Name: | bap_DescriptionOfMaturityOfOvernightDeposits
Namespace Prefix: | bap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | bap_DisclosureOfCashAndCashEquivalentsLineItems
Namespace Prefix: | bap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The implicit rate of interest on the mandatory reserve deposits made in domestic currency. + References No definition available. + Details
Name: | bap_ImplicitInterestRateDomestic
Namespace Prefix: | bap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The implicit rate of interest on the mandatory reserve deposits made in foreign currency. + References No definition available. + Details
Name: | bap_ImplicitInterestRateForeign
Namespace Prefix: | bap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The rate of interest derived from overnight deposits. + References No definition available. + Details
Name: | bap_InterestRateOnOvernightDeposits
Namespace Prefix: | bap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The carrying amount of overnight deposit one as on the date. + References No definition available. + Details
Name: | bap_OvernightDepositOne
Namespace Prefix: | bap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of overnight deposit four as on the date. + References No definition available. + Details
Name: | bap_OvernightDepositThree
Namespace Prefix: | bap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of overnight deposit two as on the date. + References No definition available. + Details
Name: | bap_OvernightDepositTwo
Namespace Prefix: | bap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | bap_ForeignCurrencyAxis=bap_UsDollarsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |