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Debt Securities Available for Sale - Weighted average yield and contractual maturities of debt securities AFS - Parenthetical (Details) - Debt securities available-for-sale - USD ($) $ in Billions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Asset pledged as collateral |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Debt securities | $ 12.9 | $ 11.3
Debt securities served as collateral for public funds | 12.0 | 10.3
Asset Not Pledged as Collateral |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Debt securities | $ 4.2 | $ 6.4

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- Definition The carrying amount, as of the date of the latest financial statement presented, of debt securities which are owned but transferred to serve as collateral for the payment of public funds. + References No definition available. + Details
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Namespace Prefix: | bpop_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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- 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: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Data Type: | na
Balance Type: |
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