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Leases - Additional Information (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2020 USD ($)
Leases [Abstract] |
Undiscounted contract amount operating leases not yet commenced | $ 4.5
Minimum |
Leases |
Remaining lease term of contract | 1 month 6 days
Operating lease contract not yet commenced | 10 years
Maximum |
Leases |
Remaining lease term of contract | 33 years 3 months 18 days
Lessee remaining lease renewal term | 20 years
Operating lease contract not yet commenced | 20 years

X
- Definition Remaining term of lessee's operating and finance lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | bpop_LesseeRemainingLeaseRenewalTerm
Namespace Prefix: | bpop_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Remaining term of lessee's lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | bpop_LesseeRemainingLeaseTermOfContract
Namespace Prefix: | bpop_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Undiscounted contract amount related to operating leases that have not yet commenced. + References No definition available. + Details
Name: | bpop_UndiscountedContractAmountOperatingLeasesNotYetCommenced
Namespace Prefix: | bpop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |