XML 198 R182.htm IDEA: XBRL DOCUMENT v3.22.1
Net Income - Interest Expenses (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2021
TWD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
TWD ($)
Dec. 31, 2019
TWD ($)
Interest Costs [Abstract]        
Interest on bonds payable $ 132   $ 46 $ 0
Interest on lease liabilities 69   80 85
Interest paid to financial institutions 16   79 17
Others 1   1 2
Interest expenses $ 218 $ 8 $ 206 $ 104