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Trade Notes and Accounts Payable (Tables) | 12 Months Ended
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Dec. 31, 2018
Trade And Other Current Payables [Abstract] |
Summary of Trade Notes and Accounts Payable |
|  | December 31 |
|  | 2017 |  |  | 2018 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |
Trade notes and accounts payable |  | $ | 19,396 |  |  | $ | 20,465 |

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- Definition Disclosure detailed information of trade notes and accounts payable. + References No definition available. + Details
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