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Income Tax Expense - Summary of Differences Between Tax Expense and Amount Arise Using Statutory Tax Rate Applicable to Profits of Entities (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]      
Profit before income tax ₩ 168,699 ₩ 109,882 ₩ 99,301
Income tax using the statutory tax rate of each country 31,300 23,951 25,957
Adjustments      
Expenses not deductible for tax purpose 9 7 11
Non taxable income (131) 0 0
Withholding tax 8,615 5,028 4,500
Utilization of previously unrecognized loss carried forward (714) (239) 0
Adjustments recognized related to prior period incomes 0 0 1,647
Tax credit (1,174) (2,131) (765)
Corporate tax on unappropriated earnings (134) 1,085 487
Changes in deferred tax liabilities related to investment in subsidiaries (422) (1,101) 1,351
Others (632) 224 233
Total adjustments 5,417 2,873 7,464
Income tax expense ₩ 36,717 ₩ 26,824 ₩ 33,421
Effective tax rate 22.00% 24.00% 34.00%