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Operating Segments Information (Tables) | 12 Months Ended
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Dec. 31, 2023
Text Block [Abstract] |
Geographic Information |
| 1) | Geographic information
|  | December 31, |  |  |  |  |  | December 31, |
|  | 2022 |  |  |  |  |  | 2023 |
|  |  |  |  | NT$ |  |  |  |  |  |  |  |  |  |  |  | NT$ |  |  |  |
Noncurrent Assets |  | (In Millions) |  |  |  |  |  | (In Millions) |
Taiwan |  |  |  |  |  |  | $2,510,238.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $2,525,608.4 |  |  |  |  |
United States |  |  |  |  |  |  | 153,137.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 420,093.1 |  |  |  |  |
China |  |  |  |  |  |  | 90,349.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 97,268.8 |  |  |  |  |
Japan |  |  |  |  |  |  | 15,432.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 94,558.9 |  |  |  |  |
Europe, the Middle East and Africa |  |  |  |  |  |  | 140.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 146.2 |  |  |  |  |
Others |  |  |  |  |  |  | 1.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.4 |  |  |  |  |
|  |  |  |  |  | $ | 2,769,301.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 3,137,675.8 |  |  |  |  |
Major Customers Representing at Least 10% of Net Revenue |
| 2) | Major customers representing at least 10% of net revenu e
|  | Years Ended December 31
|  | 2021 |  | 2022 |  | 2023
|  | Amount |  |  | % |  | Amount |  | % |  | Amount |  | %
|  |  |  |  | NT$ |  |  |  |  |  |  |  |  |  |  |  |  |  | NT$ |  |  |  |  |  |  |  |  |  |  |  | NT$ |  |  |  |  |  |  |  |  |
|  |  |  |  | (In Millions) |  |  |  |  |  |  |  |  |  |  |  |  |  | (In Millions) |  |  |  |  |  |  |  |  |  |  |  | (In Millions) |  |  |  |  |  |  |  |  |
Customer A |  |  |  |  |  | $ | 405,403.0 |  |  |  |  |  |  |  |  | 26 |  |  |  |  |  | $ 529,649.2 |  |  |  |  |  | 23 |  |  |  |  |  | $ | 546,550.9 |  |  |  |  |  |  | 25 |  |
Customer B |  |  |  |  |  |  | 153,740.8 |  |  |  |  |  |  |  |  | 10 |  |  |  |  |  | NA |  |  |  |  |  | NA |  |  |  |  |  |  | 241,152.4 |  |  |  |  |  |  | 11 |  |
Note:  Revenue less than 10% of the Company’s net revenue.

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