XML 140 R203.htm IDEA: XBRL DOCUMENT v3.20.1
Financial Instruments - Summary of Fair Value of Financial Instruments that are Measured at Fair Value on a Recurring Basis (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2019
TWD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
TWD ($)
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL $ 5,288,996 $ 176,830 $ 7,898,458
Financial assets at FVTOCI 3,800,465 12,706 1,597,323
Financial liabilities at FVTPL 973,571 32,550 36,655
Investments in equity instruments designated at fair value through other comprehensive income 755,903 25,272 580,399
Trade receivables, net 1,014,872 33,931 1,016,924
Swap contracts [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 56,561 1,891 1,557,714
Financial liabilities at FVTPL 862,581 28,839 29,058
Forward Exchange Contract [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 104,308 3,487 32,070
Financial liabilities at FVTPL 110,990 3,711 7,597
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 3,460,123 115,685 5,151,255
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 662,290 22,143 581,800
Unquoted preferred shares [member]      
Disclosure of detailed information about financial instruments [line items]      
Investments in equity instruments designated at fair value through other comprehensive income 158,718 5,306  
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 377,440 12,619 275,000
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 603,718 20,184 200,123
Private-placement convertible bonds [member] | Hybrid financial assets [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL     100,496
Unquoted ordinary shares [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets at FVTOCI, Investments in equity instruments     540,730
Investments in equity instruments designated at fair value through other comprehensive income 565,028 18,891  
Limited partnership [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets at FVTOCI, Investments in equity instruments 32,157 1,075 39,669
Unsecured subordinate corporate bonds [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets at FVTOCI, Investments in debt instruments 1,014,872 33,931 1,016,924
Trade receivables, net 2,029,690 67,860  
Forward exchange contracts [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial liabilities at FVTPL 110,990 3,711 7,597
Call options [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 24,556 821  
Call options [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 24,556 821  
Level 1 of fair value hierarchy [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 4,122,413 137,828 5,733,055
Level 1 of fair value hierarchy [member] | 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 3,460,123 115,685 5,151,255
Level 1 of fair value hierarchy [member] | 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 662,290 22,143 581,800
Level 2 of fair value hierarchy [Member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 160,869 5,378 1,690,280
Financial liabilities at FVTPL 973,571 32,550 36,655
Level 2 of fair value hierarchy [Member] | Swap contracts [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 56,561 1,891 1,557,714
Financial liabilities at FVTPL 862,581 28,839 29,058
Level 2 of fair value hierarchy [Member] | Forward Exchange Contract [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 104,308 3,487 32,070
Level 2 of fair value hierarchy [Member] | Private-placement convertible bonds [member] | Hybrid financial assets [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL     100,496
Level 2 of fair value hierarchy [Member] | Forward exchange contracts [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial liabilities at FVTPL 110,990 3,711 7,597
Level 3 of fair value hierarchy [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL 1,005,714 33,624 475,123
Financial assets at FVTOCI 3,800,465 12,706 1,597,323
Level 3 of fair value hierarchy [member] | Unquoted preferred shares [member]      
Disclosure of detailed information about financial instruments [line items]      
Investments in equity instruments designated at fair value through other comprehensive income 158,718 5,306  
Level 3 of fair value hierarchy [member] | 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 377,440 12,619 275,000
Level 3 of fair value hierarchy [member] | 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 603,718 20,184 200,123
Level 3 of fair value hierarchy [member] | Unquoted ordinary shares [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets at FVTOCI, Investments in equity instruments     540,730
Investments in equity instruments designated at fair value through other comprehensive income 565,028 18,891  
Level 3 of fair value hierarchy [member] | Limited partnership [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets at FVTOCI, Investments in equity instruments 32,157 1,075 39,669
Level 3 of fair value hierarchy [member] | Unsecured subordinate corporate bonds [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets at FVTOCI, Investments in debt instruments 1,014,872 33,931 $ 1,016,924
Trade receivables, net 2,029,690 67,860  
Level 3 of fair value hierarchy [member] | Call options [member] | Derivative financial instruments [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets mandatorily classified as at FVTPL $ 24,556 $ 821