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Long-Term Loans (Tables) | 12 Months Ended
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Dec. 31, 2017
Long-term loans [Member] |
Disclosure of detailed information about borrowings [Line Items] |
Summary of Loans |
|  | December 31 |
|  | 2016 |  |  | 2017 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |
Secured loans (Note 41) |  | $ | 1,600 |  |  | $ | 1,600 |
The annual interest rates of loans were as follows:
|  | December 31 |
|  | 2016 |  |  | 2017 |
Secured loans |  | 0.91% |  |  | 0.91% |

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