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Inventories Related to Real Estate Business (Tables)
 12 Months Ended
Dec. 31, 2024
Text block [abstract]  
Summary of Inventories Related to Real Estate Business
   
December 31
  
   
2023
    
2024
  
   
NT$
    
NT$
    
US$ (Note 4)
  
Land and buildings held for sale
  
$
666,665
 
  
$
647,039
 
  
$
19,733
 
Construction in progress
  
 
3,001,811
  
  
 
3,219,955
  
  
 
98,199
  
 
 
 
    
 
 
    
 
 
  
 
$
        3,668,476
 
  
$
  3,866,994
 
  
$
   117,932