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Other Payables - Summary of Other Payables (Detail)
$ in Millions, $ in Millions
Dec. 31, 2020
TWD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
TWD ($)
Trade And Other Current Payables [Abstract]      
Accrued salary and compensation $ 9,450   $ 9,482
Payables to contractors 1,779   1,892
Accrued compensation to employees and remuneration to directors and supervisors 1,691   1,441
Amounts collected for others 1,308   1,279
Payable on land (Note 16) 1,057   0
Payables to equipment suppliers 1,049   296
Accrued maintenance costs 1,040   955
Accrued franchise fees 785   1,091
Others 5,829   6,517
Total $ 23,988 $ 854 $ 22,953