v3.24.1
Other Intangible Assets - Summary of Carrying Amounts of Each Class of Other Intangible Assets (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 intangible assets [line items]        
Beginning balance $ 21,177,708      
Amortization expense 3,906,483 $ 127,579 $ 3,931,079 $ 4,054,120
Ending balance 17,820,133 581,977 21,177,708  
Cost [member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 40,825,968 1,333,312 40,205,066 40,355,771
Additions 527,786 17,236 491,868 1,233,019
Disposals or derecognition (936,920) (30,599) (50,313) (324,321)
Disposal of subsidiaries       (801,642)
Acquisition through business combinations       622
Effect of foreign currency exchange differences 40,712 1,329 179,347 (258,383)
Ending balance 40,457,546 1,321,278 40,825,968 40,205,066
Accumulated depreciation and impairment [Member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 19,648,260 641,681 15,641,359 12,644,000
Amortization expense 3,906,483 127,579 3,931,079 4,054,120
Impairment losses recognized     715  
Disposals or derecognition (923,567) (30,163) (40,009) (310,285)
Disposal of subsidiaries       (634,693)
Acquisition through business combinations       222
Effect of foreign currency exchange differences 6,237 204 115,116 (112,005)
Ending balance 22,637,413 739,301 19,648,260 15,641,359
Customer relationships [Member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 6,974,365      
Ending balance 5,949,623 194,305 6,974,365  
Customer relationships [Member] | Cost [member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 11,736,181 383,285 11,704,605 11,890,283
Disposals or derecognition 0 0 0 (102,637)
Effect of foreign currency exchange differences 26,380 861 31,576 (83,041)
Ending balance 11,762,561 384,146 11,736,181 11,704,605
Customer relationships [Member] | Accumulated depreciation and impairment [Member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 4,761,816 155,513 3,713,649 2,769,983
Amortization expense 1,047,282 34,203 1,043,852 1,049,759
Disposals or derecognition 0 0 0 (102,637)
Effect of foreign currency exchange differences 3,840 125 4,315 (3,456)
Ending balance 5,812,938 189,841 4,761,816 3,713,649
Computer software [Member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 2,310,815      
Ending balance 1,878,509 61,349 2,310,815  
Computer software [Member] | Cost [member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 7,616,109 248,730 7,051,694 6,966,449
Additions 537,261 17,546 459,954 1,193,060
Disposals or derecognition (905,947) (29,587) (37,442) (150,670)
Disposal of subsidiaries       (789,998)
Acquisition through business combinations       622
Effect of foreign currency exchange differences 12,970 424 141,903 (167,769)
Ending balance 7,260,393 237,113 7,616,109 7,051,694
Computer software [Member] | Accumulated depreciation and impairment [Member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 5,305,294 173,263 4,271,971 4,170,576
Amortization expense 970,413 31,692 957,708 971,190
Impairment losses recognized     715  
Disposals or derecognition (894,767) (29,222) (31,456) (139,907)
Disposal of subsidiaries       (626,338)
Acquisition through business combinations       222
Effect of foreign currency exchange differences 944 31 106,356 (103,772)
Ending balance 5,381,884 175,764 5,305,294 4,271,971
Patents and acquired specific technology [Member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 11,829,167      
Ending balance 9,948,539 324,903 11,829,167  
Patents and acquired specific technology [Member] | Cost [member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 21,317,352 696,191 21,315,241 21,319,179
Additions 1,350 44 500 2,000
Disposals or derecognition 0 0 0  
Disposal of subsidiaries       (5,401)
Effect of foreign currency exchange differences (807) (27) 1,611 (537)
Ending balance 21,317,895 696,208 21,317,352 21,315,241
Patents and acquired specific technology [Member] | Accumulated depreciation and impairment [Member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 9,488,185 309,869 7,584,837 5,598,966
Amortization expense 1,881,980 61,462 1,901,835 1,991,641
Impairment losses recognized     0  
Disposals or derecognition 0 0 0  
Disposal of subsidiaries       (5,288)
Effect of foreign currency exchange differences (809) (26) 1,513 (482)
Ending balance 11,369,356 371,305 9,488,185 7,584,837
Others [Member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 63,361      
Ending balance 43,462 1,420 63,361  
Others [Member] | Cost [member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 156,326 5,106 133,526 179,860
Additions (10,825) (354) 31,414 37,959
Disposals or derecognition (30,973) (1,012) (12,871) (71,014)
Disposal of subsidiaries       (6,243)
Effect of foreign currency exchange differences 2,169 71 4,257 (7,036)
Ending balance 116,697 3,811 156,326 133,526
Others [Member] | Accumulated depreciation and impairment [Member]        
Disclosure of detailed information about intangible assets [line items]        
Beginning balance 92,965 3,036 70,902 104,475
Amortization expense 6,808 222 27,684 41,530
Impairment losses recognized     0  
Disposals or derecognition (28,800) (941) (8,553) (67,741)
Disposal of subsidiaries       (3,067)
Effect of foreign currency exchange differences 2,262 74 2,932 (4,295)
Ending balance $ 73,235 $ 2,391 $ 92,965 $ 70,902