XML 177 R156.htm IDEA: XBRL DOCUMENT v3.23.1
Financial Instruments - Detailed Information About In Maturity Analysis For Lease Liabilities (Detail) - TWD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]    
Lease liabilities $ 22,589.1 $ 14,649.2
5-10 years [member]    
Disclosure of detailed information about financial instruments [line items]    
Lease liabilities 10,241.7 7,513.9
10-15 years [member]    
Disclosure of detailed information about financial instruments [line items]    
Lease liabilities 7,329.0 5,043.1
15-20 years [member]    
Disclosure of detailed information about financial instruments [line items]    
Lease liabilities 4,233.9 1,972.7
More than 20 years [member]    
Disclosure of detailed information about financial instruments [line items]    
Lease liabilities $ 784.5 $ 119.5