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Equity - Summary of Non-controlling Interests (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($)
Beginning balance | $ 314,750,655 |  | $ 313,276,385 | $ 268,171,060
Share of profit for the year | 1,437,974 | $ 43,854 | 1,849,952 | 3,116,549
Other comprehensive income (loss) for the year |  |  |  |
Exchange difference on translating foreign operations | 12,788,423 | 390,010 | (1,536,221) | 10,326,729
Share in other comprehensive loss from associates accounted for using the equity method | (18,192) | (555) | (28,511) | (152,833)
Disposal of subsidiary |  |  | (295,895) |
Non-controlling interest arising from capital increase of subsidiaries |  |  | 427,913 |
Ending balance | 342,270,913 | 10,438,273 | 314,750,655 | 313,276,385
Non-controlling interests [member] |  |  |  |
Beginning balance | 20,270,547 | 618,193 | 18,608,124 | 14,544,415
Share of profit for the year | 1,437,974 | 43,854 | 1,849,952 | 3,116,549
Other comprehensive income (loss) for the year |  |  |  |
Exchange difference on translating foreign operations | 687,077 | 20,954 | (47,301) | 344,780
Unrealized gain (loss) on equity instruments at FVTOCI | 6,599 | 201 | 26,560 | (44,852)
Gain (loss) from hedging | 124,336 | 3,792 | (69,189) | 110,781
Remeasurement on defined benefit plans | 3,270 | 100 | (15,876) | 51,582
Share in other comprehensive loss from associates accounted for using the equity method | (7,157) | (218) | (7,514) | (35,142)
Repurchase of outstanding shares by subsidiaries (Note 31) | (270,291) | (8,243) | 0 | (312,775)
Disposal of subsidiary | 0 | 0 | (295,895) | 0
Non-controlling interest arising from capital increase of subsidiaries | 177,487 | 5,413 | 427,913 | 0
The Group's subscription for subsidiaries' capital increase at a percentage different from its existing ownership (Note 31) | 69,141 | 2,108 | 0 | 0
Cash dividends distributed to non-controlling interests | (593,390) | (18,097) | (912,261) | (575,089)
Non-controlling interest relating to outstanding vested employee share options granted by subsidiaries | 238,183 | 7,264 | 293,740 | 315,871
Equity component of convertible bonds issued by subsidiaries | 100,885 | 3,077 | 412,294 | 1,092,004
Ending balance | $ 22,244,661 | $ 678,398 | $ 20,270,547 | $ 18,608,124

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