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Financial Instruments at Fair Value Through Profit or Loss - Summary of Financial Instruments at Fair Value Through Profit or Loss (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL $ 8,934,151 $ 290,731 $ 5,436,280
Current 6,825,157 222,101 2,933,446
Non-current 2,108,994 68,630 2,502,834
Financial liabilities held for trading 626,760 20,396 417,660
Swap contracts [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 3,205,828 104,323 85,629
Financial liabilities held for trading 543,547 17,688 360,797
Forward exchange contracts [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 246,710 8,028 23,373
Financial liabilities held for trading 83,213 2,708 56,863
Call option and put option of convertible bonds [Member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL     8,463
Target redemption forward contracts [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL     500
Quoted ordinary shares [member] | Non derivative financial assets [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 2,521,964 82,069 2,683,193
Private-placement funds [member] | Non derivative financial assets [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 1,599,932 52,064 1,322,686
Unquoted preferred shares [member] | Non derivative financial assets [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 628,156 20,441 583,270
Contingent considerations [member] | Non derivative financial assets [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 438,176 14,259 394,943
Open-end mutual funds [member] | Non derivative financial assets [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL $ 293,385 $ 9,547 $ 334,223