v3.26.1
Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2025
TWD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
TWD ($)
Dec. 31, 2023
TWD ($)
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance $ 312,531,471      
Additions 171,616,529 $ 5,470,721 $ 96,207,546 $ 48,758,649
Depreciation expense 60,938,680 1,942,578 53,500,799 51,799,481
Ending balance 421,115,044 13,424,133 312,531,471  
Cost [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 820,825,884 26,165,952 720,974,420 691,728,308
Additions 171,616,529 5,470,721 96,207,546 48,758,649
Disposals (20,045,980) (639,017) (15,116,549) (18,153,613)
Reclassification (241,305) (7,693) (16,013) 182,588
Acquisitions through business combinations 147,075 4,688 9,578,821 1,632,097
Effect of foreign currency exchange differences (2,056,800) (65,566) 9,197,659 (3,173,609)
Ending balance 970,245,403 30,929,085 820,825,884 720,974,420
Accumulated depreciation, amortisation and impairment [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 508,294,413 16,203,200 456,102,898 423,493,690
Depreciation expense 60,938,680 1,942,578 53,500,799 51,799,481
Impairment losses recognized 304,659 9,712 133,880 146,570
Disposals (17,989,561) (573,464) (14,437,811) (17,981,026)
Reclassification (175,930) (5,609) (71,961) 51,031
Acquisitions through business combinations 5,561 178 8,237,380 885,900
Effect of foreign currency exchange differences (2,247,463) (71,643) 4,829,228 (2,292,748)
Ending balance 549,130,359 17,504,952 508,294,413 456,102,898
Land and Land Improvements [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 17,570,624      
Ending balance 18,083,984 576,474 17,570,624  
Land and Land Improvements [Member] | Cost [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 17,647,746 562,568 13,581,613 13,006,893
Additions 561,752 17,907 3,931,878 424,130
Disposals (1,256) (40) (152,357) (3,436)
Reclassification 10,633 339 4,699 142,562
Acquisitions through business combinations 51,200 1,632 175,261 18,049
Effect of foreign currency exchange differences (83,543) (2,663) 106,652 (6,585)
Ending balance 18,186,532 579,743 17,647,746 13,581,613
Land and Land Improvements [Member] | Accumulated depreciation, amortisation and impairment [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 77,122 2,458 58,441  
Depreciation expense 21,328 680 17,255 17,860
Disposals (1,256) (40)   (3,436)
Reclassification       43,725
Acquisitions through business combinations 3,880 124    
Effect of foreign currency exchange differences 1,474 47 1,426 292
Ending balance 102,548 3,269 77,122 58,441
Buildings and improvements [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 121,588,485      
Ending balance 145,561,338 4,640,145 121,588,485  
Buildings and improvements [member] | Cost [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 212,467,292 6,772,945 181,833,417 172,798,699
Additions 330,504 10,536 6,177,957 1,866,786
Disposals (2,504,027) (79,822) (3,250,387) (8,786,519)
Reclassification 34,568,619 1,101,964 23,003,450 16,398,574
Acquisitions through business combinations 10,350 330 1,153,289 150,347
Effect of foreign currency exchange differences (184,287) (5,875) 3,549,566 (594,470)
Ending balance 244,688,451 7,800,078 212,467,292 181,833,417
Buildings and improvements [member] | Accumulated depreciation, amortisation and impairment [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 90,878,807 2,896,997 81,099,672 81,175,408
Depreciation expense 11,201,721 357,084 10,126,682 8,896,551
Impairment losses recognized 100,037 3,189 16,472 134,999
Disposals (2,310,161) (73,642) (2,994,916) (8,771,076)
Reclassification (213,175) (6,796) 14,145 (35,568)
Acquisitions through business combinations 0 0 955,951 24,770
Effect of foreign currency exchange differences (530,116) (16,899) 1,660,801 (325,412)
Ending balance 99,127,113 3,159,933 90,878,807 81,099,672
Machinery and equipment [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 137,430,483      
Ending balance 181,115,735 5,773,533 137,430,483  
Machinery and equipment [member] | Cost [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 542,656,891 17,298,594 490,699,539 473,494,702
Additions 1,536,263 48,972 2,033,804 2,308,779
Disposals (16,486,897) (525,562) (10,611,069) (7,912,516)
Reclassification 92,798,209 2,958,183 48,348,102 24,044,088
Acquisitions through business combinations 19,145 610 7,575,012 1,159,537
Effect of foreign currency exchange differences (1,763,149) (56,205) 4,611,503 (2,395,051)
Ending balance 618,760,462 19,724,592 542,656,891 490,699,539
Machinery and equipment [member] | Accumulated depreciation, amortisation and impairment [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 405,226,408 12,917,641 363,873,339 331,365,217
Depreciation expense 48,429,031 1,543,801 41,930,945 41,403,363
Impairment losses recognized 204,622 6,523 32,455 10,802
Disposals (14,631,845) (466,428) (10,352,348) (7,774,818)
Reclassification 35,783 1,140 (2,892) 7,674
Acquisitions through business combinations 1,595 51 6,918,742 735,808
Effect of foreign currency exchange differences (1,620,867) (51,669) 2,826,167 (1,874,707)
Ending balance 437,644,727 13,951,059 405,226,408 363,873,339
Other equipment [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 3,203,839      
Ending balance 3,400,546 108,401 3,203,839  
Other equipment [member] | Cost [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 15,315,915 488,235 14,094,658 14,354,608
Additions 117,456 3,744 239,234 141,158
Disposals (1,047,070) (33,378) (1,097,340) (1,441,685)
Reclassification 1,402,147 44,697 1,084,919 992,109
Acquisitions through business combinations 3,673 117 660,442 136,687
Effect of foreign currency exchange differences (135,604) (4,323) 334,002 (88,219)
Ending balance 15,656,517 499,092 15,315,915 14,094,658
Other equipment [member] | Accumulated depreciation, amortisation and impairment [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 12,112,076 386,104 11,071,446 10,953,065
Depreciation expense 1,286,600 41,013 1,425,917 1,481,707
Impairment losses recognized 0 0 276 769
Disposals (1,046,299) (33,354) (1,090,547) (1,431,696)
Reclassification 1,462 47 1,463 35,200
Acquisitions through business combinations 86 3 362,687 125,322
Effect of foreign currency exchange differences (97,954) (3,122) 340,834 (92,921)
Ending balance 12,255,971 390,691 12,112,076 11,071,446
Construction in progress and machinery under installation [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 32,738,040      
Ending balance 72,953,441 2,325,580 32,738,040  
Construction in progress and machinery under installation [member] | Cost [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 32,738,040 1,043,610 20,765,193 18,073,406
Additions 169,070,554 5,389,562 83,824,673 44,017,796
Disposals (6,730) (215) (5,396) (9,457)
Reclassification (129,020,913) (4,112,876) (72,457,183) (41,394,745)
Acquisitions through business combinations 62,707 1,999 14,817 167,477
Effect of foreign currency exchange differences 109,783 3,500 595,936 (89,284)
Ending balance $ 72,953,441 $ 2,325,580 32,738,040 $ 20,765,193
Construction in progress and machinery under installation [member] | Accumulated depreciation, amortisation and impairment [member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Impairment losses recognized     84,677  
Reclassification     $ (84,677)