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Contents of Significant Accounts - Financial Assets at Fair Value through Other Comprehensive Income (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Disclosure of financial assets [line items]      
Financial assets at fair value through other comprehensive income, current $ 5,753,379 $ 187,896 $ 3,213,057
Financial assets at fair value through other comprehensive income, non-current 11,930,581 $ 389,634 11,976,543
Total 17,683,960   15,189,600
Common stocks [member]      
Disclosure of financial assets [line items]      
Total 17,508,897   15,007,053
Preferred stocks [member]      
Disclosure of financial assets [line items]      
Total $ 175,063   $ 182,547