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Cash Flow Information - Summary of Non-cash Investing Activities (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Dec. 31, 2022
TWD ($)
Payments for property, plant and equipment        
Purchase of property, plant and equipment $ 96,207,546 $ 2,934,052 $ 48,758,649 $ 75,800,574
Increase (decrease) in other non-current assets 1,210,888 36,928 (387,233) (5,480)
Decrease (increase) in other payables (17,610,885) (537,081) 5,894,525 (3,096,926)
Capitalized borrowing costs (285,611) (8,710) (107,712) (58,263)
Payments for property, plant and equipment 79,521,938 2,425,189 54,158,229 72,639,905
Proceeds from disposal of property, plant and equipment        
Consideration from disposal of property, plant and equipment 887,718 27,072 334,348 612,213
Decrease (increase) in other receivables 821 26 132,790 2,784
Decrease in other current assets 19,514 595 8,188  
Decrease in other non-current assets 0 0 0 134,760
Proceeds from disposal of property, plant and equipment 908,053 27,693 475,326 749,757
Payments for FVTOCI [Abstract]        
Increase in FVTOCI (Note 38) 12,150,760 370,563 0 0
Decrease in other receivables (12,137,200) (370,150) 0 0
Increase In Fair Value Through Other Comprehensive Income $ 13,560 $ 413 $ 0 $ 0