XML 177 R163.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Revenue - Summary of Revenue Recognized (Detail) - TWD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenue [abstract]      
Telecommunications business $ 6,660 $ 6,626 $ 5,952
Project business 5,290 4,067 4,630
Others 540 440 431
Contracts with customers revenue recognized $ 12,490 $ 11,133 $ 11,013