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v3.22.1

Other Income and Expense (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Other non-operating income [Abstract] |  |  |
Reversal of other provisions | ₩ 15,548 | ₩ 25,826 | ₩ 16,542
Reversal of allowance for doubtful accounts | 98 | 2,465 | 0
Gains on government grants | 458 | 269 | 281
Gains on assets contributed | 9,347 | 24,324 | 6,921
Gains on liabilities exempted | 1,830 | 1,314 | 916
Compensation and reparations revenue | 104,826 | 95,407 | 113,292
Revenue from foundation fund | 1 |  |
Revenue from research contracts | 5,996 | 4,001 | 5,276
Income related to transfer of assets from customers | 661,212 | 643,477 | 604,808
Rental income | 204,123 | 193,567 | 191,088
Others of Other Income | 30,694 | 45,798 | 58,849
Refund of claim for rectification | 7,274 | 11,880 | 1,969
Adjustment of research project | 7,638 | 2,150 | 3,294
Maintenance expenses on lease building | 160 | 2,785 | 153
Training expenses | 1,739 | 3,852 | 3,167
Deposit redemption | 378 | 314 | 436
Reversal of expenses on litigation | 991 | 620 | 9,926
Revenue on royalty fee | 173 | 0 | 0
Reimbursement of insurance fee | 1 | 22 | 610
Gains on guarantee contracts | 27 | 134 | 135
Miscellaneous other non-operating income | 12,313 | 24,041 | 39,159
Other nonoperating income | 1,034,133 | 1,036,448 | 997,973
Other non-operating expense |  |  |
Compensation and indemnification expense | 663 | 11,959 | 403
Accretion expenses of other provisions | 2,711 | 17,991 | 7,939
Depreciation expenses on investment properties | 1,386 | 1,453 | 5,069
Depreciation expenses on idle assets | 3,621 | 6,604 | 6,542
Other bad debt expense | 49,372 | 32,503 | 29,348
Donations | 152,456 | 316,981 | 64,752
Others of Other Expense | 47,723 | 30,229 | 127,860
Operating expenses related to the idle assets | 44 | 46 | 49
Research grants | 109 | 91 | 399
Expenses related to farming and fishing village supports | 17,065 | 16,115 | 13,991
Expenses related to Operating of a fitness center | 6,948 | 5,101 | 5,234
Expenses on adjustment of research and development grants | 2,241 | 720 | 554
Taxes and dues | 119 | 253 | 188
Expenses on R&D supports | 861 | 242 | 67
Miscellaneous other non-operating expense | 20,336 | 7,661 | 107,378
Other Nonoperating Expense | ₩ 257,932 | ₩ 417,720 | ₩ 241,913

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