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Employee benefits - Plans target allocation by asset category (Details)	Dec. 31, 2023	Dec. 31, 2022
Popular Related Securities
Defined Benefit Plan Disclosure
Define benefit plan actual asset allocations	2.00%	2.00%
Popular Related Securities | Minimum
Defined Benefit Plan Disclosure
Defined benefit plan assets target allocation	0.00%
Popular Related Securities | Maximum
Defined Benefit Plan Disclosure
Defined benefit plan assets target allocation	5.00%
Equity
Defined Benefit Plan Disclosure
Define benefit plan actual asset allocations	22.00%	27.00%
Equity | Minimum
Defined Benefit Plan Disclosure
Defined benefit plan assets target allocation	0.00%
Equity | Maximum
Defined Benefit Plan Disclosure
Defined benefit plan assets target allocation	70.00%
Debt Securities
Defined Benefit Plan Disclosure
Define benefit plan actual asset allocations	74.00%	69.00%
Debt Securities | Minimum
Defined Benefit Plan Disclosure
Defined benefit plan assets target allocation	0.00%
Debt Securities | Maximum
Defined Benefit Plan Disclosure
Defined benefit plan assets target allocation	100.00%
Cash and Cash Equivalents
Defined Benefit Plan Disclosure
Define benefit plan actual asset allocations	2.00%	2.00%
Cash and Cash Equivalents | Minimum
Defined Benefit Plan Disclosure
Defined benefit plan assets target allocation	0.00%
Cash and Cash Equivalents | Maximum
Defined Benefit Plan Disclosure
Defined benefit plan assets target allocation	100.00%

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

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- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

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