Contents of Significant Accounts - Cash and Cash Equivalents (Detail) $ in Thousands, $ in Thousands |
Dec. 31, 2025
TWD ($)
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Dec. 31, 2025
USD ($)
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Dec. 31, 2024
TWD ($)
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Dec. 31, 2024
USD ($)
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Dec. 31, 2023
TWD ($)
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Dec. 31, 2022
TWD ($)
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| Cash And Cash Equivalents [Abstract] | ||||||
| Cash on hand and petty cash | $ 6,655 | $ 6,258 | ||||
| Checking and savings accounts | 25,019,390 | 25,388,395 | ||||
| Time deposits | 77,994,948 | 73,507,742 | ||||
| Repurchase agreements collateralized by government bonds and corporate notes | 7,639,059 | 6,097,831 | ||||
| Total | $ 110,660,052 | $ 3,527,576 | $ 105,000,226 | $ 3,347,154 | $ 132,553,615 | $ 173,818,777 |
| X | ||||||||||
- Definition The amount of cash balances held at banks. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount of cash held by the entity. This does not include demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of instruments purchased for resale in reverse repurchase agreements and cash collateral on securities borrowed. [Refer: Repurchase agreements and cash collateral on securities lent] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition A classification of cash equivalents representing short-term deposits. [Refer: Cash equivalents] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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