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Other Operating Income and Expenses, Net | 12 Months Ended
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Dec. 31, 2019
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Other Operating Income and Expenses, Net |
25. | OTHER OPERATING INCOME AND EXPENSES, NET
|  | Years Ended December 31 |
|  | 2017 |  |  | 2018 |  |  | 2019 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |
Loss on disposal or retirement of property, plant and equipment, ne t |  | $ | (1,097.9 | ) |  | $ | (1,005.6 | ) |  | $ | (950.0 | )
Reversal of impairment loss (impairment loss) on property, plant and equipment |  |  | — |  |  |  | (423.5 | ) |  |  | 301.4 |
Others |  |  | (267.6 | ) |  |  | (672.4 | ) |  |  | 152.3 |
|  | $ | (1,365.5 | ) |  | $ | (2,101.5 | ) |  | $ | (496.3 | )

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- Definition The disclosure of other operating income or expense. [Refer: Other operating income (expense)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_10_e&doctype=Standard -URIDate 2019-03-27 + Details
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