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Equity - Summary of Exchange Differences on Translating Foreign Operations (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Beginning balance $ 268,171,060   $ 231,737,116 $ 212,802,312
Exchange differences arising on translating foreign operations 10,326,729 $ 336,047 (4,094,565) (831,784)
Share from associates and joint venture accounted for using the equity method (152,833) (4,974) 29,209 131,009
Ending balance 313,276,385 10,194,480 268,171,060 231,737,116
Exchange differences on translating foreign operations [member]        
Beginning balance (15,393,646) (500,932) (11,641,939) (10,762,684)
Exchange differences arising on translating foreign operations 9,981,949 324,827 (3,203,730) (1,173,204)
Share from associates and joint venture accounted for using the equity method (117,691) (3,830) 21,307 101,038
Disposal of associates and joint venture accounted for using the equity method       29,971
Disposal of foreign operations     (569,284) 162,940
Ending balance $ (5,529,388) $ (179,935) $ (15,393,646) $ (11,641,939)