v3.24.1
Equity - Summary of Unrealized Gain (Loss) on Financial Assets at FVTOCI (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
Financial assets at fair value through other comprehensive income [line items]        
Balance at January 1 $ 1,542,271      
Other comprehensive income for the year, net of income tax 449,350 $ 14,675 $ 8,632,472 $ 406,016
Ending balance 1,663,737 54,335 1,542,271  
Unrealized gain (loss) on financial assets at fair value through other comprehensive income [member]        
Financial assets at fair value through other comprehensive income [line items]        
Balance at January 1 1,275,505 41,656 4,190,361 2,027,902
Debt instruments (22,599) (738) (16,746) 63,722
Equity instruments (77,496) (2,531) (8,360) (8,671)
Share from associates and joint ventures accounted for using the equity method 2,447,656 79,937 (2,928,173) 3,599,703
Other comprehensive income for the year, net of income tax 2,347,561 76,668 (2,953,279) 3,654,754
Cumulative unrealized loss of equity instruments transferred to retained earnings due to disposal 230,940 7,542 190,500 33,258
Cumulative unrealized gain transferred to retained earnings due to disposal of equity instruments in relation to associates and joint venture accounted for using the equity method (304,358) (9,940) (152,077) (1,525,553)
Ending balance $ 3,549,648 $ 115,926 $ 1,275,505 $ 4,190,361