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Net employee defined benefit - Summary of Employee Defined Benefit Plan (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of net defined benefit asset (liability) [line items] |  |
Fair value of plan assets | $ 25,783 | $ 29,086
Employee benefits liability | (40,115) | (28,837)
Benefit (liability) assets | (14,332) | 249
Defined benefit obligation [member] |  |
Disclosure of net defined benefit asset (liability) [line items] |  |
Employee benefits liability | (39,466) | (28,195)
Other employee benefits [member] |  |
Disclosure of net defined benefit asset (liability) [line items] |  |
Employee benefits liability | $ (649) | $ (642)

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- Definition Non-current net defined benefit assets and liabilities. + References No definition available. + Details
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Namespace Prefix: | cpa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of assets held by retirement benefit plans. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2020-01-01 -Paragraph 35 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=26&code=ifrs-tx-2020-en-r&anchor=para_35_a_i&doctype=Standard -URIDate 2020-01-01 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of liabilities other than the actuarial present value of promised retirement benefits in retirement benefit plans. [Refer: Actuarial present value of promised retirement benefits] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2020-01-01 -Paragraph 35 -Subparagraph a -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=26&code=ifrs-tx-2020-en-r&anchor=para_35_a_v&doctype=Standard -URIDate 2020-01-01 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=cpa_DefinedBenefitObligationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=cpa_OtherEmployeeBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |