Contents of Significant Accounts - Inventories, Net - Additional Information (Detail) - TWD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Classes Of Inventories [Abstract] | |||
| Inventories recognized in operating costs | $ 160,486,000,000 | $ 148,575,000,000 | $ 136,902,000,000 |
| Write-down of inventories | 1,391,000,000 | 858,000,000 | 1,148,000,000 |
| Inventories pledged | $ 0 | $ 0 | $ 0 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The amount of inventories pledged as security for liabilities. [Refer: Inventories] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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