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Non-cash Transactions (Tables) | 12 Months Ended
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Dec. 31, 2017
Noncash Investing Activities [Abstract] |
Non-cash Investing Activities | For the years ended December 31, 2015, 2016 and 2017, the Company entered into the following non-cash investing activities:
|  | Year Ended December 31 |
|  | 2015 |  |  | 2016 |  |  | 2017 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Increase in property, plant and equipment |  | $ | 24,451 |  |  | $ | 24,591 |  |  | $ | 26,069 |
Other payables |  |  | 633 |  |  |  | (1,074 | ) |  |  | 806 |
|  | $ | 25,084 |  |  | $ | 23,517 |  |  | $ | 26,875 |

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- Definition Disclosure of non-cash investing transactions. + References No definition available. + Details
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- Definition Non-cash investing activities. + References No definition available. + Details
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