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Finance Expenses (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Interest Expense |  |  |
Trade and other payables | ₩ 94,019 | ₩ 42,830 | ₩ 57,160
Short-term borrowings | 42,971 | 32,545 | 35,891
Long-term borrowings | 119,806 | 92,243 | 87,011
Debt securities | 1,827,511 | 1,771,544 | 1,698,232
Other financial liabilities | 558,464 | 505,112 | 491,665
Interest Expense (Before Capitalizing borrowing costs) | 2,642,771 | 2,444,274 | 2,369,959
Less: Capitalized borrowing costs | (595,960) | (575,816) | (580,407)
Interest expense | 2,046,811 | 1,868,458 | 1,789,552
Losses on sale of financial assets | 2,106 | 1 | 2,343
Losses on valuation of financial assets at fair value through profit or loss | 4,513 | 6,616 | 0
Impairment of available-for-sale financial assets | 0 | 0 | 2,713
Losses on valuation of derivatives | 45,385 | 46,740 | 890,832
Losses on transaction of derivatives | 71,546 | 32,448 | 198,218
Losses on foreign currency translation | 553,731 | 393,859 | 207,944
Losses on foreign currency transaction | 55,509 | 121,763 | 35,175
Losses on repayment of financial liabilities | 0 | 0 | 5
Other Finance Expenses | 2,555 | 858 | 1,170
Total Finance Expense | ₩ 2,782,156 | ₩ 2,470,743 | ₩ 3,127,952

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