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Classification of Expenses By Nature - Details of Classification of Expenses By Nature (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Expenses by nature [abstract]      
Advertising expenses ₩ 13,661 ₩ 29,898 ₩ 35,948
Fees and commissions 472,324 259,024 215,613
Lease expenses 1,292 1,179 1,125
Outsourcing expenses 13,053 11,415 12,997
Salaries 44,339 40,315 35,532
Expenses related to defined contribution and benefit plans 2,505 2,255 2,090
Employee benefits 4,256 3,895 3,390
Depreciation 5,252 5,145 4,570
Amortization 2,406 1,917 1,748
Other expenses 5,422 3,733 3,361
Total ₩ 564,510 ₩ 358,776 ₩ 316,374