v3.26.1
Cash Flow Information - Change in Liabilities Arising From Financing Activities (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 non-cash investing activities [line items]        
Beginning balance $ 213,868,147 $ 6,817,601 $ 191,733,723 $ 202,279,392
Net financing cash flows 65,979,480 2,103,267 14,939,523 (11,954,082)
Interest under operating activities (5,947) (190) 13,538 22
Convertible bonds classified separately as equity components and embedded derivative liability (522,771) (16,665) (100,872) (412,264)
Non-cash changes        
Additions to lease liabilities 2,402,174 76,576 1,342,690 1,644,665
Convertible bonds issued by subsidiaries and converted to subsidiaries' ordinary shares (6,608,846) (210,674) (99) (228)
Amortization of discount 87,617 2,793 443,314 411,116
Lease modifications (298,011) (9,500) (409,679) (113,514)
Adjustments for government subsidy     (748) (1,002)
Acquisitions through business combinations 56,394 1,798 96,894 143,629
Reclassification       (8,226)
Effects of foreign currency exchange (2,013,371) (64,180) 5,809,863 (255,785)
Ending balance 272,944,866 8,700,826 213,868,147 191,733,723
Income tax paid        
Operating activities 7,108,597 226,605 9,072,635 15,474,646
Investing activities 0 0 1,170,149 0
Total taxes paid 7,108,597 226,605 10,242,784 15,474,646
Short-term borrowings [member]        
Disclosure of non-cash investing activities [line items]        
Beginning balance 47,444,862 1,512,428 50,254,188 46,731,130
Net financing cash flows (5,839,428) (186,147) (4,514,729) 3,231,840
Non-cash changes        
Effects of foreign currency exchange (497,581) (15,861) 1,705,403 291,218
Ending balance 41,107,853 1,310,420 47,444,862 50,254,188
Short-term Bills Payable [member]        
Disclosure of non-cash investing activities [line items]        
Beginning balance 0 0 2,787,340 0
Net financing cash flows 2,198,419 70,080 (2,787,340) 2,787,340
Convertible bonds classified separately as equity components and embedded derivative liability       0
Non-cash changes        
Convertible bonds issued by subsidiaries and converted to subsidiaries' ordinary shares       0
Amortization of discount       0
Acquisitions through business combinations 22,000 702    
Effects of foreign currency exchange       0
Ending balance 2,220,419 70,782 0 2,787,340
Bonds Payable [member]        
Disclosure of non-cash investing activities [line items]        
Beginning balance 32,976,164 1,051,201 45,009,486 47,850,324
Net financing cash flows (10,623,145) (338,640) (12,867,386) (2,573,366)
Convertible bonds classified separately as equity components and embedded derivative liability (522,771) (16,665) (100,872) (412,264)
Non-cash changes        
Convertible bonds issued by subsidiaries and converted to subsidiaries' ordinary shares (6,608,846) (210,674) (99) (228)
Amortization of discount 11,333 361 366,988 319,578
Adjustments for government subsidy       0
Effects of foreign currency exchange (265,105) (8,451) 568,047 (174,558)
Ending balance 14,967,630 477,132 32,976,164 45,009,486
Long-term borrowings [member]        
Disclosure of non-cash investing activities [line items]        
Beginning balance 125,635,098 4,004,944 85,460,703 99,989,451
Net financing cash flows 81,306,931 2,591,869 36,656,269 (14,263,230)
Interest under operating activities       0
Non-cash changes        
Additions to lease liabilities       0
Amortization of discount 76,284 2,432 76,326 91,538
Lease modifications       0
Adjustments for government subsidy     (748) (1,002)
Acquisitions through business combinations 14,467 461    
Effects of foreign currency exchange (1,231,923) (39,270) 3,442,548 (356,054)
Ending balance 205,800,857 6,560,436 125,635,098 85,460,703
Lease liabilities [member]        
Disclosure of non-cash investing activities [line items]        
Beginning balance 7,812,023 249,028 8,222,006 7,708,487
Net financing cash flows (1,063,297) (33,895) (1,547,291) (1,136,666)
Interest under operating activities (5,947) (190) 13,538 22
Convertible bonds classified separately as equity components and embedded derivative liability       0
Non-cash changes        
Additions to lease liabilities 2,402,174 76,576 1,342,690 1,644,665
Convertible bonds issued by subsidiaries and converted to subsidiaries' ordinary shares       0
Amortization of discount       0
Lease modifications (298,011) (9,500) (409,679) (113,514)
Adjustments for government subsidy       0
Acquisitions through business combinations 19,927 635 96,894 143,629
Reclassification       (8,226)
Effects of foreign currency exchange (18,762) (598) 93,865 (16,391)
Ending balance $ 8,848,107 $ 282,056 $ 7,812,023 $ 8,222,006