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Condensed consolidating financial information of guarantor and issuers of registered guaranteed securities - Additional Information (Details)	Sep. 30, 2019
PNA Holding Co.
Condensed income statements
Wholly-owned subsidiary percentage	100.00%

X

- Definition

Wholly-owned subsidiaries percentage.

+ References

No definition available.

+ Details

Name:	bpop_WhollyOwnedSubsidiaryPercentage
Namespace Prefix:	bpop_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- 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:	srt_CondensedIncomeStatementsCaptionsLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_NonGuarantorSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: