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v3.20.1

Other Income and Expense (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Other non-operating income [Abstract] |  |  |
Reversal of other provisions | ₩ 16,542 | ₩ 12,700 | ₩ 35,265
Reversal of allowance for doubtful accounts | 0 | 143 | 2,166
Gains on government grants | 281 | 482 | 430
Gains on assets contributed | 6,921 | 17,336 | 4,218
Gains on liabilities exempted | 916 | 10,303 | 3,166
Compensation and reparations revenue | 113,292 | 89,901 | 89,196
Revenue from research contracts | 5,276 | 6,818 | 12,580
Income related to transfer of assets from customers | 604,808 | 594,548 | 478,973
Rental income | 191,088 | 186,631 | 192,136
Others of Other Income | 58,849 | 51,032 | 50,988
Refund of claim for rectification | 1,969 | 8,933 | 9,655
Adjustment of research project | 3,294 | 2,267 | 3,884
Maintenance expenses on lease building | 153 | 176 | 135
Training expenses | 3,167 | 3,220 | 3,045
Deposit redemption | 436 | 7 | 34
Reversal of expenses on litigation | 9,926 | 753 | 360
Revenue on royalty fee | 0 | 6,909 | 2,888
Reimbursement of insurance fee | 610 | 7,145 | 1,498
Gains on guarantee contracts | 135 | 39 | 456
Miscellaneous other non-operating income | 39,159 | 21,583 | 29,033
Other non-operating income | 997,973 | 969,894 | 869,118
Other non-operating expense |  |  |
Compensation and indemnification expense | 403 | 23,437 | 37
Accretion expenses of other provisions | 7,939 | 41,924 | 7,535
Depreciation expenses on investment properties | 5,069 | 923 | 1,176
Depreciation expenses on idle assets | 6,542 | 6,547 | 6,644
Other bad debt expense | 29,348 | 17,827 | 1,778
Donations | 64,752 | 63,743 | 119,421
Others of Other Expense | 127,860 | 76,929 | 43,464
Operating expenses related to the idle assets | 49 | 47 | 136
Research grants | 399 | 461 | 1,180
Supporting expenses on farming and fishing village | 13,991 | 13,537 | 11,956
Operating expenses on fitness center | 5,234 | 4,788 | 3,498
Expenses on adjustment of research and development grants | 554 | 404 | 806
Taxes and dues | 188 | 199 | 2,270
Expenses on R&D supporting | 67 | 53 | 5,459
Miscellaneous other non-operating expense | 107,378 | 57,440 | 18,159
Other non-operating expense | ₩ 241,913 | ₩ 231,330 | ₩ 180,055

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