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Cash and Cash Equivalents (Tables) | 12 Months Ended
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Dec. 31, 2021
Text Block [Abstract] |
Summary of Cash and Cash Equivalents |
|  | December 31, 2020 |  |  | December 31, 2021 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |
Cash and deposits in banks |  | $ | 653,580.6 |  |  | $ | 1,058,808.1 |
Repurchase agreements |  |  | 1,750.4 |  |  |  | 5,275.3 |
Government bonds |  |  | 3,716.1 |  |  |  | 906.8 |
Commercial paper |  |  | 1,123.5 |  |  |  | — |
|  | $ | 660,170.6 |  |  | $ | 1,064,990.2 |

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