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Mortgage banking activities -subnote (Details) - GNMA $ in Millions | 3 Months Ended
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Sep. 30, 2020 USD ($)
Mortgage banking [Line Items] |
Loss for previously advanced interest on delinquent loans | $ (10.5)
Bulk loan repurchase |
Mortgage banking [Line Items] |
Repurchased loans | $ 687.9

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- Definition Represents gains/(losses), including interest advances, from the repurchase of unreserved loans without credit recourse. + References No definition available. + Details
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Namespace Prefix: | bpop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Definition Unpaid principal amount of loans repurchased. + References No definition available. + Details
Name: | bpop_RepurchasedLoans
Namespace Prefix: | bpop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_QualitativeAndQuantitativeInformationTransferorsContinuingInvolvementTransferredFinancialAssetsByTransferOrTransfereeAxis=bpop_BulkLoanRepurchaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |