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Contents of Significant Accounts - Non-Operating Income and Expenses (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($)
Disclosure of detailed information about financial instruments [line items] |  |  |  |
Gain (Loss) on valuation of financial assets and liabilities at fair value through profit or loss | $ (320,956) |  | $ (40,553) | $ (1,247,962)
Gain (Loss) on disposal of investments accounted for under the equity method | (2,093) |  | 163,395 | 50,553
Others | 20,345 |  | 100,254 | 62,869
Total other gains and losses | (302,704) | $ (9,232) | 223,096 | (1,134,540)
Interest expenses, bonds payable | 500,757 |  | 444,424 | 486,079
Interest expenses, bank loans | 963,263 |  | 833,548 | 1,100,840
Interest expenses, lease liabilities | 196,457 |  | 179,367 | 166,928
Interest expenses, others | 18,225 |  | 16,390 | 31,464
Financial expenses | 77,398 |  | 96,645 | 81,018
Total finance costs | $ 1,756,100 | $ 53,556 | $ 1,570,374 | $ 1,866,329

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- Definition The gains (losses) on disposals of investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 98 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of interest expense on bank loans and overdrafts. [Refer: Interest expense; Bank overdrafts] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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