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Selling and Administrative Expenses - Summary of Selling and Administrative Expenses (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of attribution of expenses by nature to their function [line items] |  |  |
Salaries | ₩ 5,515,166 | ₩ 5,471,459 | ₩ 5,397,682
Retirement benefit expense | 460,302 | 615,370 | 601,390
Welfare and benefit expense | 695,203 | 695,839 | 725,998
Insurance expense | 147,690 | 127,507 | 122,453
Depreciation | 12,864,913 | 12,301,131 | 11,771,324
Amortization of intangible assets | 163,174 | 156,160 | 166,161
Bad debt expense | 62,808 | 23,634 | 17,968
Commission | 801,768 | 771,947 | 717,559
Advertising expense | 39,161 | 44,291 | 38,782
Training expense | 23,964 | 22,140 | 18,206
Vehicle maintenance expense | 18,172 | 21,024 | 17,001
Publishing expense | 6,160 | 6,746 | 6,878
Business promotion expense | 5,082 | 6,538 | 7,299
Rent expense | 206,556 | 234,119 | 237,884
Telecommunication expense | 17,519 | 17,622 | 19,528
Transportation expense | 103,601 | 114,857 | 54,235
Taxes and dues | 687,066 | 676,497 | 622,826
Expendable supplies expense | 54,504 | 56,776 | 50,466
Water, light and heating expense | 57,407 | 77,952 | 55,376
Repairs and maintenance expense | 2,774,262 | 2,739,424 | 2,617,995
Ordinary development expense | 717,561 | 727,810 | 689,397
Travel expense | 93,497 | 95,061 | 78,202
Clothing expense | 19,940 | 21,822 | 18,534
Survey and analysis expense | 5,224 | 5,448 | 4,881
Membership fee | 16,667 | 18,381 | 9,823
Disclosure - Other selling and administrative expenses |  |  |
General and administrative expenses | 3,061,582 | 3,009,422 | 2,875,796
Selling and administrative expense |  |  |
Disclosure of attribution of expenses by nature to their function [line items] |  |  |
Salaries | 1,098,460 | 1,142,360 | 1,121,188
Retirement benefit expense | 89,533 | 109,758 | 113,127
Welfare and benefit expense | 152,836 | 155,781 | 155,558
Insurance expense | 27,726 | 20,835 | 17,909
Depreciation | 241,533 | 244,676 | 219,427
Amortization of intangible assets | 88,648 | 85,661 | 91,428
Bad debt expense | 62,808 | 23,634 | 17,968
Commission | 460,644 | 420,390 | 410,287
Advertising expense | 30,305 | 33,739 | 29,230
Training expense | 7,900 | 7,327 | 4,923
Vehicle maintenance expense | 9,044 | 10,749 | 8,849
Publishing expense | 3,281 | 3,732 | 3,568
Business promotion expense | 2,559 | 3,198 | 3,522
Rent expense | 44,807 | 47,680 | 43,650
Telecommunication expense | 7,813 | 7,945 | 8,569
Transportation expense | 1,099 | 1,012 | 870
Taxes and dues | 112,449 | 122,177 | 93,446
Expendable supplies expense | 7,252 | 9,617 | 9,052
Water, light and heating expense | 16,207 | 17,950 | 12,351
Repairs and maintenance expense | 154,062 | 152,449 | 123,134
Ordinary development expense | 217,319 | 213,932 | 213,936
Travel expense | 16,265 | 16,062 | 11,099
Clothing expense | 10,450 | 13,044 | 10,540
Survey and analysis expense | 1,068 | 1,126 | 889
Membership fee | 1,503 | 1,469 | 1,331
Disclosure - Other selling and administrative expenses |  |  |
Accommodation development expenses | 49,988 | 56,038 | 57,815
Miscellaneous wages | 97,474 | 31,910 | 47,221
Litigation and filing expenses | 19,204 | 14,876 | 16,383
Compensation for damages | 4,300 | 3,116 | 3,303
Outsourcing expenses | 3,511 | 3,635 | 3,799
Reward expenses | 2,770 | 2,740 | 3,006
Overseas market development expenses | 1,503 | 1,376 | 1,192
Others | 17,261 | 29,428 | 17,226
Others | 196,011 | 143,119 | 149,945
General and administrative expenses | ₩ 3,061,582 | ₩ 3,009,422 | ₩ 2,875,796

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