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Other Gains (Losses) (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Other gains |  |  |  |  |
Gains on disposal of property, plant and equipment | ₩ 43,784 |  | ₩ 98,077 |  | ₩ 48,316
Gains on disposal of intangible assets | 206 |  | 12 |  | 564
Reversal of impairment loss on property, plant and equipment | 16,692 |  |  |  |
Reversal of impairment loss on intangible assets | 0 |  | 17 |  | 54
Gains on foreign currency translation | 16,340 |  | 14,905 |  | 20,485
Gains on foreign currency transaction | 53,152 |  | 47,297 |  | 93,151
Gains on insurance proceeds | 17,410 |  | 0 |  | 400
Miscellaneous Other Gains | 238,688 |  | 221,556 |  | 269,562
Gains on disposal of inventories | 3,424 |  | 6,350 |  | 6,024
Gains on proxy collection of TV license fee | 41,013 |  | 40,450 |  | 39,711
Gains on compensation of impaired electric poles | 1,372 |  | 1,166 |  | 1,526
Gains on compensation for infringement on contract | 0 |  | 3,648 |  | 18,990
Gains on harbor facilities dues | 3,741 |  | 3,803 |  | 3,025
Gains on technical fees | 3,044 |  | 2,026 |  | 2,105
Reversal of occupation development training fees | 1,472 |  | 1,602 |  | 1,697
Gains on disposal of waste | 5,317 |  | 4,232 |  | 4,261
Gains on insurance | 812 |  | 22,382 |  | 10,410
Gains on tax rebate | 341 |  | 542 |  | 2,161
Gains on other commission | 1,111 |  | 4,347 |  | 4,790
Gains on disposal of assets held-for-sale | 23,778 |  |  |  |
Others of Miscellaneous Other Gains | 153,263 |  | 131,008 |  | 174,862
Other losses |  |  |  |  |
Losses on disposal of property, plant and equipment | (72,508) |  | (60,704) |  | (70,514)
Losses on disposal of intangible assets | (827) |  | (43) |  | (183)
Impairment loss on property, plant and equipment | (50,036) | [1],[2] | (710,164) | [3] | (51,067)
Impairment loss on intangible assets | (513,609) |  | (8,112) |  | (20)
Impairment loss on other non-current assets | (49,620) |  | (87,024) |  |
Losses on foreign currency translation | (8,757) |  | (7,678) |  | (25,495)
Losses on foreign currency transaction | (55,283) |  | (65,366) |  | (36,241)
Miscellaneous Other Losses | (217,892) |  | (63,899) |  | (92,385)
Losses on valuation of inventories | 3,127 |  | 1,953 |  | 3,875
Losses on disposal of inventories | 10,456 |  | 3,555 |  | 3,273
Losses due to disaster | 7,635 |  | 2,129 |  | 5,374
Losses on rounding adjustment of electric charge surtax | 1,268 |  | 1,265 |  | 1,253
Losses on adjustments of levies | 0 |  | 0 |  | 1
Forfeit of taxes and dues | 0 |  | 0 |  | 656
Others Of Miscellaneous Other Losses | 195,406 |  | 54,997 |  | 77,953
Net other gains | ₩ (582,258) |  | ₩ (621,124) |  | ₩ 156,627
[1] | As described in Note 2, the Company recognized impairment loss of KRW3,819 million related to Wolsong unit 1, Shin-Hanul unit 3 and 4 and reversal of impairment loss of KRW16,693 million related to Wolsong unit 1.
[2] | KEPCO Bylong Australia Pty., Ltd., 100% owned subsidiary, performed an impairment test over its land and others. The Company recognized the amount of the carrying amount in excess of its recoverable amount as an impairment loss.
[3] | Korea Hydro & Nuclear Power Co., Ltd. And Korea Western Power Co., Ltd., 100% owned subsidiaries, have determined that there are impairment indicators for the shutdowns of certain power generation units and fire, and performed an impairment test over the individual assets. As a result, the Company recognized the amount of the carrying amount in excess of its recoverable amount as an impairment loss in the consolidated statements of comprehensive income.

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