Investments Accounted for Using Equity Method - Market Prices of Investments Accounted for Using Equity Method in Publicly Traded Stocks Calculated by Closing Price at End of Reporting Period (Detail) - Level 1 [member] - TWD ($) $ in Millions |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|
| Global Unichip Corporation [member] | ||
| Disclosure of associates [line items] | ||
| Closing Price in Active Markets | $ 81,236.9 | $ 29,926.9 |
| Vanguard International Semiconductor Corporation [member] | ||
| Disclosure of associates [line items] | ||
| Closing Price in Active Markets | 37,834.2 | 35,977.3 |
| Xintec Inc. [member] | ||
| Disclosure of associates [line items] | ||
| Closing Price in Active Markets | $ 14,188.4 | $ 10,716.4 |