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Finance Expenses - Summary of Finance Expenses and Interest Expense (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Interest costs [abstract]      
Trade and other payables ₩ 204,078 ₩ 213,765 ₩ 88,757
Short-term borrowings 145,201 42,371 29,358
Long-term borrowings 204,037 115,141 118,678
Debt securities 2,388,517 1,728,588 1,805,253
Other financial liabilities 472,248 384,423 540,867
Interest expense (before capitalizing borrowing costs) 3,414,081 2,484,288 2,582,913
Less: Capitalized borrowing costs (595,535) (569,831) (587,488)
Interest expense 2,818,546 1,914,457 1,995,425
Losses on sale of financial assets 1,841 1,045 648
Losses on valuation of financial assets at fair value through profit or loss 44,329 5,480 7,396
Losses on valuation of derivatives 371,038 37,017 513,278
Losses on transaction of derivatives 205,162 40,818 81,055
Losses on foreign currency transaction 346,711 83,558 79,103
Losses on foreign currency translation 934,005 1,159,334 215,047
Losses on repayment of financial liabilities 15 10 35
Others 25,144 4,058 4,456
Total Finance Expense ₩ 4,746,791 ₩ 3,245,777 ₩ 2,896,443