Consolidated Statements of Changes in Equity shares in Thousands, $ in Thousands, $ in Thousands |
TWD ($) |
USD ($) |
Share capital [member]
TWD ($)
shares
|
Share capital [member]
USD ($)
shares
|
Capital surplus [member]
TWD ($)
|
Capital surplus [member]
USD ($)
|
Legal reserve [member]
TWD ($)
|
Legal reserve [member]
USD ($)
|
Special reserve [member]
TWD ($)
|
Special reserve [member]
USD ($)
|
Unappropriated earnings [member]
TWD ($)
|
Unappropriated earnings [member]
USD ($)
|
Retained earnings [member]
TWD ($)
|
Retained earnings [member]
USD ($)
|
Exchange differences on translating foreign operations [member]
TWD ($)
|
Exchange differences on translating foreign operations [member]
USD ($)
|
Unrealized gain (loss) on financial assets at fair value through other comprehensive income [member]
TWD ($)
|
Unrealized gain (loss) on financial assets at fair value through other comprehensive income [member]
USD ($)
|
Gain (loss) on hedging instrument [member]
TWD ($)
|
Gain (loss) on hedging instrument [member]
USD ($)
|
Unearned employee benefit [member]
TWD ($)
|
Unearned employee benefit [member]
USD ($)
|
Equity directly associated with disposal groups held for sale [member]
TWD ($)
|
Other reserves [member]
TWD ($)
|
Other reserves [member]
USD ($)
|
Treasury shares [member]
TWD ($)
|
Treasury shares [member]
USD ($)
|
Equity attributable to owners of the company [member]
TWD ($)
|
Equity attributable to owners of the company [member]
USD ($)
|
Non-controlling interests [member]
TWD ($)
|
Non-controlling interests [member]
USD ($)
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beginning balance at Dec. 31, 2022 | $ 313,276,385 | $ 43,679,841 | $ 142,607,490 | $ 12,582,960 | $ 10,367,052 | $ 91,556,474 | $ 114,506,486 | $ (5,529,388) | $ 1,275,505 | $ 520,281 | $ (432,847) | $ (4,166,449) | $ (1,959,107) | $ 294,668,261 | $ 18,608,124 | ||||||||||||||||
| Beginning balance, shares at Dec. 31, 2022 | shares | 4,367,984 | 4,367,984 | |||||||||||||||||||||||||||||
| Appropriation of earnings | |||||||||||||||||||||||||||||||
| Legal reserve | 6,001,564 | (6,001,564) | |||||||||||||||||||||||||||||
| Special reserve | (6,845,501) | 6,845,501 | |||||||||||||||||||||||||||||
| Cash dividends distributed by the Company | (38,482,083) | (38,482,083) | (38,482,083) | (38,482,083) | |||||||||||||||||||||||||||
| Total appropriation of earnings | (38,482,083) | 6,001,564 | (6,845,501) | (37,638,146) | (38,482,083) | (38,482,083) | |||||||||||||||||||||||||
| Reversal of special reserve appropriated at the first-time adoption of IFRS Accounting Standards | (561,978) | 561,978 | |||||||||||||||||||||||||||||
| Change from investments in associates accounted for using the equity method | 3,255 | 3,255 | 3,255 | ||||||||||||||||||||||||||||
| Other changes in the capital surplus | 87 | 87 | 87 | ||||||||||||||||||||||||||||
| Net profit for the year | 37,307,860 | 35,457,908 | 35,457,908 | 35,457,908 | 1,849,952 | ||||||||||||||||||||||||||
| Other comprehensive income (loss) for the year, net of income tax | 449,350 | (32,134) | (32,134) | (1,505,241) | 2,347,561 | (242,840) | $ (4,676) | 594,804 | 562,670 | (113,320) | |||||||||||||||||||||
| Total comprehensive income (loss) | 37,757,210 | 35,425,774 | 35,425,774 | (1,505,241) | 2,347,561 | (242,840) | (4,676) | 594,804 | 36,020,578 | 1,736,632 | |||||||||||||||||||||
| Cash dividends received by subsidiaries from the Company | 641,387 | 641,387 | 641,387 | ||||||||||||||||||||||||||||
| Disposal of subsidiary | (295,895) | (295,895) | |||||||||||||||||||||||||||||
| Differences between consideration and carrying amount arising from acquisition of subsidiaries | 427,913 | 427,913 | |||||||||||||||||||||||||||||
| Share-based payment from the Company | 1,537,850 | $ 174,657 | 929,634 | 712 | 712 | 432,847 | 432,847 | 1,537,850 | |||||||||||||||||||||||
| Share-based payment from the Company, shares | shares | 17,466 | 17,466 | |||||||||||||||||||||||||||||
| Cash dividends distributed by subsidiaries | (912,261) | (912,261) | |||||||||||||||||||||||||||||
| Share-based payment from subsidiaries | 384,513 | 90,773 | 90,773 | 293,740 | |||||||||||||||||||||||||||
| Issue of convertible bonds by subsidiaries (Note 21) | 412,294 | 412,294 | |||||||||||||||||||||||||||||
| Disposal of investments in equity instruments at fair value through other comprehensive income | 73,418 | 73,418 | (73,418) | (73,418) | |||||||||||||||||||||||||||
| Non-controlling interests arising from capital increase of subsidiaries | 427,913 | ||||||||||||||||||||||||||||||
| Ending balance at Dec. 31, 2023 | 314,750,655 | $ 43,854,498 | 144,272,626 | 18,584,524 | 2,959,573 | 89,980,210 | 111,524,307 | (7,034,629) | 3,549,648 | 277,441 | (4,676) | (3,212,216) | (1,959,107) | 294,480,108 | 20,270,547 | ||||||||||||||||
| Ending balance, shares at Dec. 31, 2023 | shares | 4,385,450 | 4,385,450 | |||||||||||||||||||||||||||||
| Appropriation of earnings | |||||||||||||||||||||||||||||||
| Legal reserve | 3,232,866 | (3,232,866) | |||||||||||||||||||||||||||||
| Special reserve | (167,613) | 167,613 | |||||||||||||||||||||||||||||
| Cash dividends distributed by the Company | (22,838,947) | (22,838,947) | (22,838,947) | (22,838,947) | |||||||||||||||||||||||||||
| Total appropriation of earnings | (22,838,947) | 3,232,866 | (167,613) | (25,904,200) | (22,838,947) | (22,838,947) | |||||||||||||||||||||||||
| Change from investments in associates accounted for using the equity method | 4,445 | 4,445 | 4,445 | ||||||||||||||||||||||||||||
| Other changes in the capital surplus | 68 | 68 | 68 | ||||||||||||||||||||||||||||
| Net profit for the year | 33,816,910 | 32,378,936 | 32,378,936 | 32,378,936 | 1,437,974 | ||||||||||||||||||||||||||
| Other comprehensive income (loss) for the year, net of income tax | 13,638,305 | 173,524 | 173,524 | 12,085,635 | 122,083 | 438,262 | 4,676 | 12,650,656 | 12,824,180 | 814,125 | |||||||||||||||||||||
| Total comprehensive income (loss) | 47,455,215 | 32,552,460 | 32,552,460 | 12,085,635 | 122,083 | 438,262 | $ 4,676 | 12,650,656 | 45,203,116 | 2,252,099 | |||||||||||||||||||||
| Cash dividends received by subsidiaries from the Company | 379,462 | 379,462 | 379,462 | ||||||||||||||||||||||||||||
| Share-based payment from the Company | 2,971,598 | $ 298,007 | 4,228,820 | 76,028 | 76,028 | (1,631,257) | (1,631,257) | 2,971,598 | |||||||||||||||||||||||
| Share-based payment from the Company, shares | shares | 29,801 | 29,801 | |||||||||||||||||||||||||||||
| Cash dividends distributed by subsidiaries | (593,390) | (593,390) | |||||||||||||||||||||||||||||
| Share-based payment from subsidiaries | 320,130 | 81,947 | 81,947 | 238,183 | |||||||||||||||||||||||||||
| Issue of convertible bonds by subsidiaries (Note 21) | 100,885 | 100,885 | |||||||||||||||||||||||||||||
| Disposal of investments in equity instruments at fair value through other comprehensive income | (58,828) | (58,828) | 58,828 | 58,828 | |||||||||||||||||||||||||||
| Changes in percentage of ownership interest in subsidiaries | (456,695) | (250,106) | (5,439) | (5,439) | (255,545) | (201,150) | |||||||||||||||||||||||||
| Non-controlling interests arising from capital increase of subsidiaries | 177,487 | 177,487 | |||||||||||||||||||||||||||||
| Ending balance at Dec. 31, 2024 | 342,270,913 | $ 44,152,505 | 148,717,262 | 21,817,390 | 2,791,960 | 96,640,231 | 121,249,581 | 5,051,006 | $ 161,014 | 3,730,559 | 715,703 | (1,631,257) | 7,866,011 | (1,959,107) | 320,026,252 | 22,244,661 | $ 709,106 | ||||||||||||||
| Ending balance, shares at Dec. 31, 2024 | shares | 4,415,251 | 4,415,251 | |||||||||||||||||||||||||||||
| Appropriation of earnings | |||||||||||||||||||||||||||||||
| Legal reserve | 3,259,174 | (3,259,174) | |||||||||||||||||||||||||||||
| Cash dividends distributed by the Company | (23,420,372) | (23,420,372) | (23,420,372) | (23,420,372) | |||||||||||||||||||||||||||
| Total appropriation of earnings | (23,420,372) | 3,259,174 | (26,679,546) | (23,420,372) | (23,420,372) | ||||||||||||||||||||||||||
| Change from investments in associates accounted for using the equity method | 16,093 | 16,093 | 16,093 | ||||||||||||||||||||||||||||
| Other changes in the capital surplus | 76 | 76 | 76 | ||||||||||||||||||||||||||||
| Net profit for the year | 41,196,440 | $ 1,313,243 | 40,015,755 | 40,015,755 | 40,015,755 | 1,180,685 | |||||||||||||||||||||||||
| Other comprehensive income (loss) for the year, net of income tax | (3,617,203) | (115,307) | (997,790) | (997,790) | (5,189,939) | 3,725,567 | $ 118,762 | (865,379) | (2,329,751) | (3,327,541) | (289,662) | ||||||||||||||||||||
| Total comprehensive income (loss) | 37,579,237 | 1,197,936 | 39,017,965 | 39,017,965 | (5,189,939) | 3,725,567 | (865,379) | (2,329,751) | 36,688,214 | 891,023 | |||||||||||||||||||||
| Cash dividends received by subsidiaries from the Company | 386,307 | 386,307 | 386,307 | ||||||||||||||||||||||||||||
| Differences between consideration and carrying amount arising from acquisition of subsidiaries | (57,475) | (68,093) | (68,093) | 10,618 | |||||||||||||||||||||||||||
| Share-based payment from the Company | 5,083,413 | $ 327,263 | 3,780,009 | 976,141 | 976,141 | 5,083,413 | |||||||||||||||||||||||||
| Share-based payment from the Company, shares | shares | 32,726 | 32,726 | |||||||||||||||||||||||||||||
| Cash dividends distributed by subsidiaries | (514,157) | (514,157) | |||||||||||||||||||||||||||||
| Share-based payment from subsidiaries | 878,830 | 300,782 | 300,782 | 578,048 | |||||||||||||||||||||||||||
| Issue of convertible bonds by subsidiaries (Note 21) | 272,167 | 272,167 | |||||||||||||||||||||||||||||
| Disposal of investments in equity instruments at fair value through other comprehensive income | (15,484) | (15,484) | 15,484 | 15,484 | |||||||||||||||||||||||||||
| Changes in percentage of ownership interest in subsidiaries | 6,134,068 | 3,169,280 | 3,169,280 | 2,964,788 | |||||||||||||||||||||||||||
| Non-controlling interests arising from capital increase of subsidiaries | 0 | 0 | |||||||||||||||||||||||||||||
| Ending balance at Dec. 31, 2025 | $ 368,629,100 | $ 11,751,006 | $ 44,479,768 | $ 1,417,908 | $ 156,301,716 | $ 4,982,522 | $ 25,076,564 | $ 799,380 | $ 2,791,960 | $ 89,001 | $ 108,963,166 | $ 3,473,483 | $ 136,831,690 | $ 4,361,864 | $ (138,933) | $ (4,429) | $ 7,471,610 | $ 238,177 | $ (149,676) | $ (4,771) | $ (655,116) | $ (20,884) | $ 6,527,885 | $ 208,093 | $ (1,959,107) | $ (62,452) | $ 342,181,952 | $ 10,907,935 | $ 26,447,148 | $ 843,071 | |
| Ending balance, shares at Dec. 31, 2025 | shares | 4,447,977 | 4,447,977 |