XML 105 R78.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Financial Assets at Fair Value Through Other Comprehensive Income - Summary of Financial Assets at Fair Value through Other Comprehensive Income (Detail)
$ in Millions, $ in Millions
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Disclosure of financial assets [line items]      
Current $ 154,530.8   $ 122,998.5
Noncurrent 7,208.7 $ 235.4 6,159.2
Investment in equity and debt instruments at FVTOCI 161,739.5   129,157.7
Debt securities [member]      
Disclosure of financial assets [line items]      
Investments in debt instruments at FVTOCI 149,802.9   122,720.6
Debt securities [member] | Corporate bonds [member]      
Disclosure of financial assets [line items]      
Investments in debt instruments at FVTOCI 79,605.5   66,116.2
Debt securities [member] | Agency mortgage-backed securities [member]      
Disclosure of financial assets [line items]      
Investments in debt instruments at FVTOCI 37,959.7   28,367.9
Debt securities [member] | Government bonds/Agency bonds [member]      
Disclosure of financial assets [line items]      
Investments in debt instruments at FVTOCI 22,338.9   18,961.8
Debt securities [member] | Asset-backed securities [member]      
Disclosure of financial assets [line items]      
Investments in debt instruments at FVTOCI 9,898.8   9,274.7
Equity instruments [member]      
Disclosure of financial assets [line items]      
Investment in equity instruments at FVTOCI 11,936.6   6,437.1
Equity instruments [member] | Non-publicly traded stocks [member]      
Disclosure of financial assets [line items]      
Investment in equity instruments at FVTOCI 7,208.7   6,159.2
Equity instruments [member] | Publicly traded stocks [member]      
Disclosure of financial assets [line items]      
Investment in equity instruments at FVTOCI $ 4,727.9   $ 277.9