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v3.19.3

Segment Reporting - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018
Popular U.S. |  |
Segment Reporting Information |  |
Intercompany billings | $ 3.3 | $ 9.5
Banco Popular de Puerto Rico |  |
Segment Reporting Information |  |
Intercompany billings | $ 21.8 | $ 59.3

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- Definition Intercompany billings from subsidiaries + References No definition available. + Details
Name: | bpop_IntercompanyBillings
Namespace Prefix: | bpop_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=bpop_PopularBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=bpop_BancoPopularDePuertoRicoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |