| 26. | OTHER OPERATING INCOME AND EXPENSES, NET |
| Years Ended December 31 | ||||||||||||
| 2015 | 2016 | 2017 | ||||||||||
| NT$ | NT$ | NT$ | ||||||||||
| (In Millions) | (In Millions) | (In Millions) | ||||||||||
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Gain (loss) on disposal or retirement of property, plant and equipment, net |
$ | 433.5 | $ | 46.5 | $ | (1,097.9 | ) | |||||
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Impairment loss on property, plant and equipment |
(2,545.6 | ) | — | — | ||||||||
|
Gain from lease agreement modification |
430.0 | — | — | |||||||||
|
Others |
(198.5 | ) | (16.7 | ) | (267.6 | ) | ||||||
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| $ | (1,880.6 | ) | $ | 29.8 | $ | (1,365.5 | ) | |||||
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