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Significant Assets and Liabilities Denominated in Foreign Currencies (Tables)
 12 Months Ended
Dec. 31, 2022
Text block [abstract]  
Summary of Significant Assets and Liabilities Denominated in Foreign Currencies
The following information was aggregated by the foreign currencies other than functional currencies of the group entities and the exchange rates between foreign currencies and respective functional currencies were disclosed. The significant financial assets and liabilities denominated in foreign currencies were as follows:
 
    
Foreign
Currencies
(In Thousand)
     
Exchange Rate
   
Carrying
Amount
(In Thousand)
  
       
December 31, 2021
                       
       
Monetary financial assets
                       
US$
    $ 4,885,163      US$1=NT$27.68    $ 135,221,324  
US$
      1,718,314      US$1=RMB6.3757      47,562,940  
US$
      42,250      US$1=EUR0.8829      1,169,492  
JPY
      12,584,942      JPY1=NT$0.2405      3,026,677  
JPY
      551,496      JPY1=US$0.0087      132,635  
       
Monetary financial liabilities
                       
US$
      4,899,633      US$1=NT$27.68      135,621,853  
US$
      1,503,606      US$1=RMB6.3757      41,619,803  
US$
      88,741      US$1=EUR0.8829      2,456,363  
JPY
      14,078,075      JPY1=NT$0.2405      3,385,776  
JPY
      990,667      JPY1=US$0.0087      238,255  
       
December 31, 2022
                       
       
Monetary financial assets
                       
US$
      5,602,783      US$1=NT$30.71      172,061,459  
US$
      1,517,342      US$1=RMB6.9646      46,597,573  
US$
      24,066      US$1=EUR0.9376      739,064  
JPY
      8,599,044      JPY1=NT$0.2324      1,998,417  
JPY
      410,433      JPY1=US$0.0076      95,385  
       
Monetary financial liabilities
                       
US$
      5,539,862      US$1=NT$30.71      170,129,161  
US$
      1,361,060      US$1=RMB6.9646      41,798,164  
US$
      56,203      US$1=EUR0.9376      1,725,989  
JPY
      10,093,229      JPY1=NT$0.2324      2,345,666  
JPY
      343,989      JPY1=US$0.0076      79,943  
Summary of Realized and Unrealized Foreign Exchange Gain (Loss)
The significant realized and unrealized foreign exchange gain (loss) were as follows:
 
   
For the Year Ended December 31
  
   
2020
    
2021
    
2022
  
Functional
Currencies
  
Exchange Rate
  
Net Foreign
Exchange Gain
(Loss)
    
Exchange Rate
  
Net Foreign
Exchange Gain
(Loss)
    
Exchange Rate
  
Net Foreign

Exchange Gain (Loss)
  
       
NT$
        
NT$
        
NT$
    
US$ (Note 4)
  
               
US$
   US$1=NT$28.48   $ (143,804 )    US$1=NT$27.68   $ 132,582     US$1=NT$30.71   $ (347,044 )    $ (11,293 ) 
NT$
         1,382,067           1,413,969           (2,985,318 )      (97,147 ) 
RMB
   RMB1=NT$4.3648     (181,624 )    RMB1=NT$4.3415     (85,675 )    RMB1=NT$4.4094     921,898       30,000  
       
 
 
        
 
 
        
 
 
    
 
 
  
               
        $ 1,056,639         $ 1,460,876         $ (2,410,464 )    $ (78,440 )