v3.24.1
Financial Instruments - Summary of Financial Assets Measured at Level 3 Fair Value (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 fair value measurement of assets [line items]        
Beginning Balance $ 707,589,842      
Net increase (decrease) in trade receivables 15,868,810 $ 518,250 $ 754,156 $ (27,957,812)
Ending Balance 666,915,692 21,780,394 707,589,842  
Available-for-sale [member] | Level 3 of fair value hierarchy [member]        
Disclosure of fair value measurement of assets [line items]        
Beginning Balance 9,565,566 312,396 10,311,050 4,265,531
Recognized in profit or loss (83,352) (2,722) 100,739 131,276
Recognized in other comprehensive income (included in unrealized (losses) gains on financial assets at FVTOCI) 199,107 6,503 (383,608) 193,448
Recognized in other comprehensive income (effects of foreign currency exchange) 6,658 217 200,973 (84,122)
Net increase (decrease) in trade receivables 6,012,850 196,370 3,655,963 18,210,321
Trade receivables factoring (purchases) (5,778,078) (188,703) (4,345,711) (12,744,272)
Purchases 883,774 28,863 372,341 491,292
Disposals (870,346) (28,424) (346,181) (122,666)
Reclassify       (29,758)
Ending Balance 9,906,607 323,534 9,565,566 10,311,050
Available-for-sale [member] | Level 3 of fair value hierarchy [member] | Disposal of subsidiaries [member]        
Disclosure of fair value measurement of assets [line items]        
Disposals (29,572) (966)    
Available-for-sale [member] | Level 3 of fair value hierarchy [member] | FVTPL equity instrument [member]        
Disclosure of fair value measurement of assets [line items]        
Beginning Balance 2,666,264 87,076 2,300,899 1,897,984
Recognized in profit or loss (83,239) (2,719) 100,134 131,276
Recognized in other comprehensive income (effects of foreign currency exchange) 5,053 165 195,415 (79,614)
Purchases 637,767 20,829 338,016 459,046
Disposals (681,870) (22,269) (268,200) (107,793)
Ending Balance 2,543,975 83,082 2,666,264 2,300,899
Available-for-sale [member] | Level 3 of fair value hierarchy [member] | FVTPL debt instrument [member]        
Disclosure of fair value measurement of assets [line items]        
Recognized in profit or loss     605  
Net increase (decrease) in trade receivables 5,778,078 188,703 4,330,075 3,269,782
Trade receivables factoring (purchases) (5,778,078) (188,703) (4,330,075) (3,269,782)
Purchases     14,325  
Disposals     (14,930)  
Available-for-sale [member] | Level 3 of fair value hierarchy [member] | FVTPL hybrid instruments [member]        
Disclosure of fair value measurement of assets [line items]        
Recognized in profit or loss (113) (3)    
Purchases 61,523 2,009    
Ending Balance 61,410 2,006    
Available-for-sale [member] | Level 3 of fair value hierarchy [member] | FVOCI equity instruments [member]        
Disclosure of fair value measurement of assets [line items]        
Beginning Balance 436,876 14,268 841,231 728,398
Recognized in other comprehensive income (included in unrealized (losses) gains on financial assets at FVTOCI) 215,914 7,051 (366,862) 129,726
Recognized in other comprehensive income (effects of foreign currency exchange) 1,605 52 5,558 (4,508)
Purchases 184,484 6,025 20,000 32,246
Disposals (188,476) (6,155) (63,051) (14,873)
Reclassify       (29,758)
Ending Balance 620,831 20,275 436,876 841,231
Available-for-sale [member] | Level 3 of fair value hierarchy [member] | FVOCI equity instruments [member] | Disposal of subsidiaries [member]        
Disclosure of fair value measurement of assets [line items]        
Disposals (29,572) (966)    
Available-for-sale [member] | Level 3 of fair value hierarchy [member] | FVOCI debt instruments [member]        
Disclosure of fair value measurement of assets [line items]        
Beginning Balance 6,462,426 211,052 7,168,920 1,639,149
Recognized in other comprehensive income (included in unrealized (losses) gains on financial assets at FVTOCI) (16,807) (548) (16,746) 63,722
Net increase (decrease) in trade receivables 234,772 7,667 (674,112) 14,940,539
Trade receivables factoring (purchases)     (15,636) (9,474,490)
Ending Balance $ 6,680,391 $ 218,171 $ 6,462,426 $ 7,168,920