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Net employee defined benefit - Summary of Sensitivity Analysis for Actuarial Assumptions (Detail) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Discount rate [member] |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Actuarial assumption rate | 2.00% | 2.50% | 3.90%
Compensation - salary increase [member] |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Actuarial assumption rate | 4.00% | 4.00% | 4.00%
Mortality [member] |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Demographic assumptions, Mortality | Panama expirence | RP - 2000 no collar | RP -2000 no collar
Termination [member] |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Actuarial assumption rate |  | 13.00% | 13.00%
Demographic assumptions, Mortality | 2003 SoA pension plan |  |
Male [member] |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Retirement age | 62 years | 62 years | 62 years
Female [member] |  |  |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |  |  |
Retirement age | 57 years | 57 years | 57 years

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- Definition The retirement age used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_144&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_145_a&doctype=Standard -URIDate 2020-01-01 + Details
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