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Contents of Significant Accounts - Financial Assets at Fair Value through Other Comprehensive Income (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Disclosure of financial assets [line items]      
Financial assets at fair value through other comprehensive income, current $ 5,893,377 $ 179,731 $ 5,753,379
Financial assets at fair value through other comprehensive income, non-current 11,315,951 $ 345,104 11,930,581
Total 17,209,328   17,683,960
Common stocks [member]      
Disclosure of financial assets [line items]      
Total 17,004,448   17,508,897
Preferred stocks [member]      
Disclosure of financial assets [line items]      
Total $ 204,880   $ 175,063