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Pledged Assets (Tables) | 12 Months Ended
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Dec. 31, 2023
Disclosure Of Collateral [Abstract] |
Assets Pledged as Collaterals |
|  | December 31 |
|  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |
Property, plant and equipment |  | $ | 2,403 |  |  | $ | 2,469 |
Restricted assets (included in other assets - others) |  |  | 131 |  |  |  | 546 |
|  | $ | 2,534 |  |  | $ | 3,015 |

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