Allowance for credit losses - Financial effect of the modifications made to borrowers experiencing financial difficultie (Details)	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Interest Rate Reduction \| Mortgages
Financing Receivable, Modifications [Line Items]
Weighted average contractual interest rate before modification	6.50%	5.90%
Weighted average contractual interest rate after modification	5.60%	4.50%
Interest Rate Reduction \| Commercial \| CRE non-owner occupied
Financing Receivable, Modifications [Line Items]
Weighted average contractual interest rate before modification		10.10%
Weighted average contractual interest rate after modification		8.30%
Interest Rate Reduction \| Commercial \| Commercial and industrial
Financing Receivable, Modifications [Line Items]
Weighted average contractual interest rate before modification	25.40%	25.50%
Weighted average contractual interest rate after modification	9.60%	9.80%
Interest Rate Reduction \| Consumer \| Credit card
Financing Receivable, Modifications [Line Items]
Weighted average contractual interest rate before modification	21.30%	21.10%
Weighted average contractual interest rate after modification	8.20%	6.20%
Interest Rate Reduction \| Consumer \| Personal loans
Financing Receivable, Modifications [Line Items]
Weighted average contractual interest rate before modification	21.60%	18.10%
Weighted average contractual interest rate after modification	11.70%	9.70%
Interest Rate Reduction \| Consumer \| Other
Financing Receivable, Modifications [Line Items]
Weighted average contractual interest rate before modification	18.00%
Weighted average contractual interest rate after modification	0.00%
Term extension \| Mortgages
Financing Receivable, Modifications [Line Items]
Weighted average term increase	15 years	12 years
Term extension \| Commercial \| CRE non-owner occupied
Financing Receivable, Modifications [Line Items]
Weighted average term increase	6 months	1 year
Term extension \| Commercial \| CRE owner occupied
Financing Receivable, Modifications [Line Items]
Weighted average term increase	3 months	6 months
Term extension \| Commercial \| Commercial and industrial
Financing Receivable, Modifications [Line Items]
Weighted average term increase	1 year	9 months
Term extension \| Consumer \| Personal loans
Financing Receivable, Modifications [Line Items]
Weighted average term increase	5 years	11 years
Term extension \| Consumer \| Auto Loan
Financing Receivable, Modifications [Line Items]
Weighted average term increase	3 years
Other-Than-Insignificant Payment Delays \| Commercial \| CRE non-owner occupied
Financing Receivable, Modifications [Line Items]
Weighted average term increase	10 months
Other-Than-Insignificant Payment Delays \| Commercial \| CRE owner occupied
Financing Receivable, Modifications [Line Items]
Weighted average term increase	9 months	12 months
Other-Than-Insignificant Payment Delays \| Commercial \| Commercial and industrial
Financing Receivable, Modifications [Line Items]
Weighted average term increase	13 months	8 months
Other-Than-Insignificant Payment Delays \| Consumer \| Credit card
Financing Receivable, Modifications [Line Items]
Weighted average term increase	19 months	23 months

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.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-34

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-33

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

Name:	us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage, after modification, of weighted-average interest rate of financing receivable for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

Name:	us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateAfterModification
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage, before modification, of weighted-average interest rate of financing receivable for debtor experiencing financial difficulty.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateBeforeModification
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_InterestRateBelowMarketReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_MortgageReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bpop_CommercialRealEstateNonOwnerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bpop_CommercialAndIndustrialLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CreditCardReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=bpop_CommercialRealEstateOwnerOccupiedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_AutomobileLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: