Income taxes - Effective income tax rate (Detail) |
12 Months Ended | ||
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Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Income taxes [Abstract] | |||
| Weighted average statutory income tax rate in % | 25.90% | 26.60% | 22.00% |
| Recognition of previously unrecognized tax loss and credit carryforwards | (2.70%) | (1.90%) | 16.80% |
| Unrecognized tax loss and credit carryforwards | 2.20% | 141.80% | (9.60%) |
| Changes to recognition of temporary differences | (1.60%) | 243.60% | (26.20%) |
| Non-taxable income and tax incentives | (7.90%) | (30.20%) | 22.80% |
| Non-deductible expenses | 2.90% | 10.00% | (10.70%) |
| Withholding and other taxes | 1.90% | 16.00% | (5.10%) |
| Tax rate changes | 1.00% | (0.90%) | 0.90% |
| Prior year tax | 0.80% | 1.20% | 1.90% |
| Tax expense (benefit) due to change in uncertain tax treatments | 0.90% | (20.40%) | 2.30% |
| Others, net | 0.20% | 3.10% | 1.90% |
| Effective income tax rate | 23.60% | 389.50% | 17.00% |
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- Definition The applicable income tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Tax rate effects, in aggregate, on the reconciliation between the average effective tax rate and the applicable tax rate that the entity does not separately disclose in the reconciliation. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from a change in tax rate. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the expenses not deductible in determining taxable profit. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from revenue that is exempt from taxation. [Refer: Average effective tax rate; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Changes to Recognition of Temporary Differences Rate No definition available.
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- Definition Income taxes [Abstract] No definition available.
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- Definition Recognition of previously unrecognized tax loss and credit carryforwards rate No definition available.
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- Definition Tax expenses (benefit) due to uncertain tax treatments No definition available.
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- Definition Unrecognized tax loss and credit carryforwards rate No definition available.
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- Definition Withholding and other taxes No definition available.
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