Contents of Significant Accounts - Summary of Provisions (Detail) - TWD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Contents Of Significant Accounts [Abstract] | ||
| Decommissioning Liabilities (classified under other noncurrent liabilities) | $ 898,273 | $ 695,168 |
| Onerous Contracts (classified under other current liabilities) | 160,114 | 281,244 |
| Others (classified under other current liabilities) | 69,202 | 0 |
| Total | $ 1,127,589 | $ 976,412 |
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- Definition The amount of non-current provision for decommissioning, restoration and rehabilitation costs. [Refer: Provision for decommissioning, restoration and rehabilitation costs] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount of liabilities of uncertain timing or amount, including provisions for employee benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of miscellaneous current other provisions. [Refer: Miscellaneous other provisions] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of current provision for onerous contracts. [Refer: Onerous contracts provision] Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Contents of significant accounts. No definition available.
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