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Contents of Significant Accounts - Non-Operating Income and Expenses (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
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 $ (40,553)   $ (1,247,962) $ 2,892,470
Gain (Loss) on disposal of investments accounted for under the equity method 163,395   50,553 (16,388)
Others 100,254   62,869 (2,009,952)
Total other gains and losses 223,096 $ 7,286 (1,134,540) 866,130
Interest expenses, bonds payable 444,424   486,079 437,055
Interest expenses, bank loans 833,548   1,100,840 1,285,708
Interest expenses, lease liabilities 179,367   166,928 145,187
Interest expenses, others 16,390   31,464 139
Financial expenses 96,645   81,018 94,841
Total finance costs $ 1,570,374 $ 51,286 $ 1,866,329 $ 1,962,930