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Contents of Significant Accounts - Reconciliation of Liabilities Arising from Financing Activities (Detail) - TWD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Short-term loans [member] |  |  |  |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |  |  |  |
Beginning balance |  | $ 0 |  | $ 1,924,124 |  | $ 11,057,132
Cash Flows |  | 13,530,000 |  | (1,965,684) |  | (8,974,216)
Non-cash changes,Foreign exchange |  | 0 |  | 41,560 |  | (158,792)
Non-cash changes,Others | [1] | 0 |  | 0 |  | 0
Ending Balance |  | 13,530,000 |  | 0 |  | 1,924,124
Long-term loans (current portion included) [member] |  |  |  |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |  |  |  |
Beginning balance |  | 19,279,342 |  | 36,624,907 |  | 33,066,106
Cash Flows |  | 3,857,704 |  | (18,816,259) |  | 4,088,537
Non-cash changes,Foreign exchange |  | (253,702) |  | 1,470,694 |  | (529,736)
Non-cash changes,Others | [1] | 0 |  |  |  | 0
Ending Balance |  | 22,883,344 |  | 19,279,342 |  | 36,624,907
Bonds payable (current portion included) [member] |  |  |  |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |  |  |  |
Beginning balance |  | 28,184,687 |  | 40,536,658 |  | 18,690,384
Cash Flows |  | 9,989,245 |  | (13,305,050) |  | 23,703,692
Non-cash changes,Foreign exchange |  | 0 |  |  |  |
Non-cash changes,Others | [1],[2] | 185,420 |  | 953,079 |  | (1,857,418)
Ending Balance |  | 38,359,352 |  | 28,184,687 |  | 40,536,658
Guarantee deposits (current portion included) [member] |  |  |  |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |  |  |  |
Beginning balance |  | 30,757,001 | [3] | 14,369,769 | [3] | 235,992
Cash Flows |  | 10,423,345 |  | 14,984,941 |  | 14,219,408
Non-cash changes,Foreign exchange |  | 419,040 |  | 1,402,291 |  | (85,631)
Non-cash changes,Others | [1] | 0 |  |  |  | 0
Ending Balance | [3] | 41,599,386 |  | 30,757,001 |  | 14,369,769
Lease liabilities [member] |  |  |  |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |  |  |  |
Beginning balance |  | 5,737,095 |  | 5,068,754 |  | 5,576,864
Cash Flows |  | (666,439) |  | (712,854) |  | (699,680)
Non-cash changes,Foreign exchange |  | (24,106) |  | 153,406 |  | (144,419)
Non-cash changes,Others | [1] | 346,637 |  | 1,227,789 | [4] | 335,989
Ending Balance |  | 5,393,187 |  | 5,737,095 |  | 5,068,754
Other financial liabilities [member] |  |  |  |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |  |  |  |
Beginning balance | [5] | 21,449,487 |  | 20,966,209 |  | 20,746,624
Cash Flows | [5] | (21,209,443) |  |  |  |
Non-cash changes,Foreign exchange | [5] | (330,783) |  | 306,902 |  | (163,387)
Non-cash changes,Others | [1],[5] | 90,739 |  | 176,376 |  | 382,972
Ending Balance | [5] | $ 0 |  | $ 21,449,487 |  | $ 20,966,209
[1] | Other non-cash changes mainly consisted of discount amortization measured by the effective interest method.
[2] | Please refer to Note 6(13) for the Company’s exchangeable bonds.
[3] | Guarantee deposits mainly consisted of deposits of capacity reservation.
[4] | Mainly due to the increase in land lease.
[5] | Please refer to Note 9(6) for more details on other financial liabilities.

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