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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2020
Classes Of Inventories [Abstract] |
Summary of Inventories |
|  | December 31 |
|  | 2019 |  |  | 2020 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |
Merchandise |  | $ | 3,858 |  |  | $ | 3,903 |
Project in process |  |  | 11,113 |  |  |  | 6,167 |
Work in process |  |  | 141 |  |  |  | 126 |
Raw materials |  |  | 156 |  |  |  | 137 |
|  |  | 15,268 |  |  |  | 10,333 |
Land held under development |  |  | 1,999 |  |  |  | 1,999 |
Construction in progress |  |  | 77 |  |  |  | 77 |
|  | $ | 17,344 |  |  | $ | 12,409 |

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