XML 219 R205.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Financial Instruments - Financing Facilities (Detail) - TWD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Unsecured Bank Loan Facilities [Member]    
Disclosure of detailed information about financial instruments [Line Items]    
Facility of unsecured bank loan and commercial paper payable, amount used $ 585 $ 722
Facility of unsecured/secured bank loan and commercial paper payable, amount unused 56,191 56,862
Facility of unsecured bank loan and commercial paper payable 56,776 57,584
Secured loans [Member]    
Disclosure of detailed information about financial instruments [Line Items]    
Facility of secured bank loan facility, amount used 1,600 1,600
Facility of unsecured/secured bank loan and commercial paper payable, amount unused 20 0
Facility of secured bank loan facility $ 1,620 $ 1,600