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Finance Costs (Tables) | 12 Months Ended
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Dec. 31, 2018
Text block [abstract] |
Summary of Finance Costs |
|  | Years Ended December 31 |
|  | 2016 |  |  | 2017 |  |  | 2018 |
|  | NT$ (In Millions) |  |  | NT$ (In Millions) |  |  | NT$ (In Millions) |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 3,014.7 |  |  | $ | 2,563.6 |  |  | $ | 1,633.8 |
Bank loans |  |  | 291.2 |  |  |  | 766.6 |  |  |  | 1,417.3 |
Others |  |  | 0.2 |  |  |  | 0.1 |  |  |  | 0.1 |
|  | $ | 3,306.1 |  |  | $ | 3,330.3 |  |  | $ | 3,051.2 |

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