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Financial Assets at Amortized Cost - Noncurrent (Tables) | 12 Months Ended
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Dec. 31, 2024
Financial Assets At Amortized Cost Noncurrent [Abstract] |
Disclosure of Financial Assets at Amortized Cost Noncurrent |
|  | December 31 |
|  | 2023 |  |  | 2024 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |
Corporate bonds |  | $ | — |  |  | $ | 2,000 |

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- Definition Financial assets at amortized cost noncurrent. + References No definition available. + Details
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