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Other Income and Expenses (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Other non-operating income [Abstract] |  |  |
Reversal of other provisions | ₩ 79,001 | ₩ 15,265 | ₩ 15,548
Reversal of other allowance for doubtful accounts | 1,941 | 37 | 98
Gains on government grants | 239 | 301 | 458
Gains on assets contributed | 24,183 | 1,953 | 9,347
Gains on liabilities exempted | 854 | 1,181 | 1,830
Compensation and reparations revenue | 93,785 | 89,638 | 104,826
Revenue from foundation fund | 60 | 3 | 1
Income related to transfer of assets from customers | 743,051 | 711,839 | 661,212
Rental income | 210,972 | 208,064 | 204,123
Others of Other Income | 121,816 | 67,208 | 36,690
Refund of claim for rectification | 1,054 | 701 | 7,274
Adjustment of research project | 0 | 0 | 7,638
Maintenance expenses on lease building | 124 | 125 | 160
Training expenses | 1,946 | 1,684 | 1,739
Deposit redemption | 100 | 12 | 378
Reversal of expenses on litigation | 44,197 | 1,920 | 991
Revenue on royalty fee | 422 | 455 | 173
Reimbursement of insurance fee | 0 | 0 | 1
Gains on guarantee contracts | 16 | 22 | 27
Miscellaneous other non-operating income | 73,957 | 62,289 | 18,309
Other nonoperating income | 1,275,902 | 1,095,489 | 1,034,133
Other non-operating expense |  |  |
Compensation and indemnification expense | 34 | 36 | 663
Accretion expenses of other provisions | 4,962 | 1,138 | 2,711
Depreciation expenses on investment properties | 493 | 486 | 1,386
Depreciation expenses on idle assets | 3,683 | 3,635 | 3,621
Other bad debt expense | 40,683 | 6,400 | 49,372
Donations | 169,748 | 131,037 | 152,456
Others of Other Expense | 39,302 | 69,418 | 47,723
Operating expenses related to the idle assets | 1,494 | 1,683 | 44
Research grants | 174 | 562 | 109
Expenses related to farming and fishing village supports | 13,249 | 11,272 | 17,065
Expenses related to Operating of a fitness center | 8,921 | 8,370 | 6,948
Expenses on adjustment of research and development grants | 388 | 260 | 2,241
Taxes and dues | 1,935 | 31,985 | 119
Expenses on R&D supports | 9 | 48 | 861
Miscellaneous other non-operating expense | 13,132 | 15,238 | 20,336
Other Nonoperating Expense | ₩ 258,905 | ₩ 212,150 | ₩ 257,932

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