XML 228 R214.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Related Parties Transactions - Additional Information (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2023
TWD ($)
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2023
SGD ($)
Disclosure of transactions between related parties [Line Items]        
Lease contract value $ 10,975 $ 10,673    
Interest on lease liabilities 105 75 $ 69  
Next Commercial Bank Co., Ltd. ("NCB") [Member]        
Disclosure of transactions between related parties [Line Items]        
Interest income on deposits 1      
ST-2 Satellite Ventures Pte., Ltd. ("STS") [Member]        
Disclosure of transactions between related parties [Line Items]        
Lease contract value 1,800 1,955    
Interest on lease liabilities $ 8 $ 8 $ 7  
ST2 Satellite [Member]        
Disclosure of transactions between related parties [Line Items]        
Lease term 15 years      
Lease contract value $ 6,000     $ 261
Lease contract value, prepayment amount $ 3,068      
Extended useful life 3 years 3 months      
Right-of-use assets acquired $ 1,125