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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2022
Text Block [Abstract] |
Summary of Inventories |
|  | December 31, 2021 |  |  | December 31, 2022 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |
Finished goods |  | $ | 32,562.8 |  |  | $ | 54,818.4 |
Work in process |  |  | 137,700.4 |  |  |  | 125,661.9 |
Raw materials |  |  | 11,111.1 |  |  |  | 20,389.1 |
Supplies and spare parts |  |  | 11,728.0 |  |  |  | 20,279.7 |
|  | $ | 193,102.3 |  |  | $ | 221,149.1 |
Inventory write downs | Write-down of inventories to net realizable value and reversal of write-down of inventories resulting from the increase in net realizable value were included in the cost of revenue during reporting period. The amounts are illustrated below:
|  | Years Ended December 31 |
|  | 2020 |  |  | 2021 |  |  | 2022 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |
Inventory losses |  | $ | 3,664.5 |  |  | $ | 533.0 |  |  | $ | 4,689.1 |

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