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Finance Costs (Tables) | 12 Months Ended
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Dec. 31, 2019
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Summary of Finance Costs |
|  | Years Ended December 31 |
|  | 2017 |  |  | 2018 |  |  | 2019 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |
Interest expens e |  |  |  |  |  |  |  |  |  |  |  |
Bank loans |  | $ | 766.6 |  |  | $ | 1,417.3 |  |  | $ | 1,869.4 |
Corporate bonds |  |  | 2,563.6 |  |  |  | 1,633.8 |  |  |  | 1,139.9 |
Lease liabilities |  |  | — |  |  |  | — |  |  |  | 240.9 |
Others |  |  | 0.1 |  |  |  | 0.1 |  |  |  | 0.7 |
|  | $ | 3,330.3 |  |  | $ | 3,051.2 |  |  | $ | 3,250.9 |

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