Income Tax - Summary of Reconciliation of Income Tax Expense (Detail) $ in Thousands, $ in Thousands |
12 Months Ended | |||
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Dec. 31, 2025
TWD ($)
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Dec. 31, 2025
USD ($)
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Dec. 31, 2024
TWD ($)
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Dec. 31, 2023
TWD ($)
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| Major components of tax expense (income) [abstract] | ||||
| Profit before income tax | $ 51,303,096 | $ 1,635,419 | $ 41,733,373 | $ 42,611,823 |
| Income tax expense calculated at the statutory rates | 23,693,382 | 755,288 | 18,877,355 | 18,763,311 |
| Non-deductible (non-taxable) items in determining taxable income | 906,398 | 28,894 | 668,184 | 1,132,092 |
| Tax-exempt income | (11,648,491) | (371,326) | (7,727,576) | (7,369,986) |
| Additional income tax on unappropriated earnings | 760,689 | 24,249 | 250,421 | (3,449,958) |
| Income tax credits | (3,175,371) | (101,223) | (2,250,870) | (1,921,721) |
| The origination and reversal of temporary differences | 32,167 | 1,025 | (251,896) | 69,767 |
| Income tax adjustments for prior years | (112,110) | (3,574) | (514,176) | (31,609) |
| Unrecognized deferred tax liability for temporary differences associated with investments | (1,837,670) | (58,580) | (1,996,092) | (2,557,436) |
| Unrecognized loss carryforwards | 688,156 | 21,937 | 746,146 | 455,437 |
| Withholding tax | 380,288 | 12,123 | 14,843 | 12,433 |
| Land value increment tax | 20,941 | 667 | 19,604 | 0 |
| House and land transactions income tax | 0 | 0 | 0 | 201,633 |
| Pillar Two income tax | 398,277 | 12,696 | 80,520 | 0 |
| Income tax expense recognized in profit or loss | $ 10,106,656 | $ 322,176 | $ 7,916,463 | $ 5,303,963 |
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- Definition DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences. No definition available.
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- Definition Income tax adjustments on prior years. No definition available.
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- Definition Income Tax Credits No definition available.
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- Definition Income tax on the consolidated income from house and land transactions. No definition available.
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- Definition Tax effect of net income(expense) not subject to tax. No definition available.
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- Definition Tax effect of unappropriated earnings. No definition available.
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- Definition Tax effect of withholding taxes. No definition available.
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- Definition Tax effect on Land value increment tax. No definition available.
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- Definition Tax effect on temporary differences of unrecognized deferred tax liability arising from investments. No definition available.
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- Definition Tax effect on unrecognized loss carryforwards. No definition available.
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to revenues that are exempt from taxation. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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