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Financial Income and Costs
 12 Months Ended
Dec. 31, 2025
Profit (loss) [abstract]  
Financial Income and Costs Financial Income and Costs
(1)    Details of financial income for the years ended December 31, 2023, 2024 and 2025, are as follows:
(in millions of Korean won)202320242025
Interest income₩279,607 ₩303,535 ₩259,227 
Gain on foreign currency transactions27,407 27,268 90,310 
Gain on foreign currency translation11,944 43,566 85,808 
Gain on derivative transactions12,304 48,566 11,976 
Gain on valuation of derivatives49,881 399,261 64,695 
Gain on disposal of trade receivables3,441 — — 
Gain on valuation of financial instruments32,477 13,166 41,757 
Others69,216 82,288 72,809 
Total₩486,277 ₩917,650 ₩626,582 
(2)    Details of financial costs for the years ended December 31, 2023, 2024 and 2025, are as follows:
(in millions of Korean won)202320242025
Interest expenses₩356,345 ₩374,665 ₩366,032 
Loss on foreign currency transactions34,281 49,308 18,896 
Loss on foreign currency translation95,730 426,842 73,514 
Loss on derivative transactions417 10,651 79,887 
Loss on valuation of derivatives6,598 3,793 62,711 
Loss on disposal of trade receivables17,980 7,955 13,081 
Loss on valuation of financial instruments55,049 112,154 153,246 
Others2,282 9,413 4,430 
Total₩568,682 ₩994,781 ₩771,797