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Other Income and Expense (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of other operating income (expense) [Abstract] |
Other Income |
Other income for the years ended December 31, 2016, 2017 and 2018 are as follows:
|  |  |  |  | 2016 |  |  | 2017 |  |  | 2018 |
|  |  |  |  | In millions of won |
Reversal of other provisions |  |  | ￦ |  |  |  | 22,034 |  |  |  | 35,265 |  |  |  | 12,700 |
Reversal of other allowance for doubtful accounts |  |  |  |  |  |  | 5,489 |  |  |  | 2,166 |  |  |  | 143 |
Gains on government grants |  |  |  |  |  |  | 111 |  |  |  | 430 |  |  |  | 482 |
Gains on assets contributed |  |  |  |  |  |  | 12,254 |  |  |  | 4,218 |  |  |  | 17,336 |
Gains on liabilities exempted |  |  |  |  |  |  | 1,959 |  |  |  | 3,166 |  |  |  | 10,303 |
Compensation and reparations revenue |  |  |  |  |  |  | 114,530 |  |  |  | 89,196 |  |  |  | 89,901 |
Revenue from research contracts |  |  |  |  |  |  | 13,143 |  |  |  | 12,580 |  |  |  | 6,818 |
Income related to transfer of assets from customers |  |  |  |  |  |  | 427,297 |  |  |  | 478,973 |  |  |  | 594,548 |
Rental income |  |  |  |  |  |  | 211,580 |  |  |  | 192,136 |  |  |  | 186,631 |
Others |  |  |  |  |  |  | 31,787 |  |  |  | 50,988 |  |  |  | 51,032 |
|  |  | ￦ |  |  |  | 840,184 |  |  |  | 869,118 |  |  |  | 969,894 |
Details of others of other income |
Details of others of other income for the years ended December 31, 2016, 2017 and 2018 are as follows:
|  |  |  |  | 2016 |  |  | 2017 |  |  | 2018 |
|  |  |  |  | In millions of won |
Refund of claim for rectification |  |  | ￦ |  |  |  | 8,722 |  |  |  | 9,655 |  |  |  | 8,933 |
Adjustment of research project |  |  |  |  |  |  | 4,148 |  |  |  | 3,884 |  |  |  | 2,267 |
Maintenance expenses on lease building |  |  |  |  |  |  | 354 |  |  |  | 135 |  |  |  | 176 |
Training expenses |  |  |  |  |  |  | 4,478 |  |  |  | 3,045 |  |  |  | 3,220 |
Deposit redemption |  |  |  |  |  |  | 991 |  |  |  | 34 |  |  |  | 7 |
Reversal of expenses on litigation |  |  |  |  |  |  | 893 |  |  |  | 360 |  |  |  | 753 |
Revenue on royalty fee |  |  |  |  |  |  | 2,486 |  |  |  | 2,888 |  |  |  | 6,909 |
Reimbursement of insurance fee |  |  |  |  |  |  | — |  |  |  | 1,498 |  |  |  | 7,145 |
Gains on guarantee contracts |  |  |  |  |  |  | 2,796 |  |  |  | 456 |  |  |  | 39 |
Others |  |  |  |  |  |  | 6,919 |  |  |  | 29,033 |  |  |  | 21,583 |
|  |  | ￦ |  |  |  | 31,787 |  |  |  | 50,988 |  |  |  | 51,032 |
Other Expense |
Other expense for the years ended December 31, 2016, 2017 and 2018 are as follows:
|  |  |  |  | 2016 |  |  | 2017 |  |  | 2018 |
|  |  |  |  | In millions of won |
Compensation and indemnification expense |  |  | ￦ |  |  |  | — |  |  |  | 37 |  |  |  | 23,437 |
Accretion expenses of other provisions |  |  |  |  |  |  | 4,556 |  |  |  | 7,535 |  |  |  | 41,924 |
Depreciation expenses on investment properties |  |  |  |  |  |  | 678 |  |  |  | 1,176 |  |  |  | 923 |
Depreciation expenses on idle assets |  |  |  |  |  |  | 6,639 |  |  |  | 6,644 |  |  |  | 6,547 |
Other bad debt expense |  |  |  |  |  |  | 4,585 |  |  |  | 1,778 |  |  |  | 17,827 |
Donations |  |  |  |  |  |  | 114,094 |  |  |  | 119,421 |  |  |  | 63,743 |
Others |  |  |  |  |  |  | 58,072 |  |  |  | 43,464 |  |  |  | 76,929 |
|  |  | ￦ |  |  |  | 188,624 |  |  |  | 180,055 |  |  |  | 231,330 |
Details of others of other expense |
Details of others of other expense for the years ended December 31, 2016, 2017 and 2018 are as follows:
|  |  |  |  | 2016 |  |  | 2017 |  |  | 2018 |
|  |  |  |  | In millions of won |
Operating expenses related to the idle assets |  |  | ￦ |  |  |  | 459 |  |  |  | 136 |  |  |  | 47 |
Research grants |  |  |  |  |  |  | 1,461 |  |  |  | 1,180 |  |  |  | 461 |
Supporting expenses on farming and fishing village |  |  |  |  |  |  | 15,201 |  |  |  | 11,956 |  |  |  | 13,537 |
Operating expenses on fitness center |  |  |  |  |  |  | 2,706 |  |  |  | 3,498 |  |  |  | 4,788 |
Expenses on adjustment of research and development grants |  |  |  |  |  |  | — |  |  |  | 806 |  |  |  | 404 |
Taxes and dues |  |  |  |  |  |  | 4,582 |  |  |  | 2,270 |  |  |  | 199 |
Expenses on R&D supporting |  |  |  |  |  |  | 690 |  |  |  | 5,459 |  |  |  | 53 |
Others(*) |  |  |  |  |  |  | 32,973 |  |  |  | 18,159 |  |  |  | 57,440 |
|  |  | ￦ |  |  |  | 58,072 |  |  |  | 43,464 |  |  |  | 76,929 |
(*) | Others include ￦38,886 million of impairment loss on construction-in-progress of Cheonji unit 1 and 2 and Daejin unit 1 and 2 as described in note 2.

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