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Financial Assets at Fair Value through Other Comprehensive Income Noncurrent (Tables) | 12 Months Ended
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Dec. 31, 2024
Non-current financial assets at fair value through other comprehensive income [abstract] |
Summary of Financial Assets at Fair Value through Other Comprehensive Income Noncurrent |
|  | December 31 |
|  | 2023 |  |  | 2024 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |
Domestic investments |  |  |  |  |  |
Listed and emerging stocks |  | $ | 243 |  |  | $ | 126 |
Non-listed stocks |  |  | 3,734 |  |  |  | 3,874 |
Foreign investments |  |  |  |  |  |
Non-listed stocks |  |  | 435 |  |  |  | 667 |
|  | $ | 4,412 |  |  | $ | 4,667 |

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