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v3.21.1

Selling and Administrative Expenses (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Expenses by nature [Line Items] |  |  |
Raw materials used | ₩ 13,544,827 | ₩ 17,084,029 | ₩ 19,537,928
Salaries | 5,278,637 | 4,609,976 | 4,236,623
Retirement benefits expense | 561,996 | 809,739 | 440,612
Welfare and benefit expense | 639,390 | 563,945 | 596,572
Insurance expense | 103,308 | 106,129 | 106,057
Depreciation | 11,369,496 | 10,966,756 | 9,898,386
Amortization of intangible assets | 170,466 | 156,915 | 118,938
Bad debt expense | 20,648 | (12,719) | 39,784
Commission | 744,322 | 1,011,710 | 1,189,284
Advertising expense | 37,720 | 44,305 | 40,313
Training expense | 18,108 | 24,077 | 20,373
Vehicle maintenance expense | 16,596 | 17,177 | 17,957
Publishing expense | 7,201 | 6,837 | 6,837
Business promotion expense | 7,334 | 7,019 | 6,645
Rent expense | 227,410 | 216,918 | 213,983
Telecommunication expense | 18,647 | 19,485 | 106,073
Transportation expense | 11,369 | 5,420 | 5,223
Taxes and dues | 555,031 | 540,350 | 486,741
Expendable supplies expense | 44,995 | 39,681 | 38,010
Water, light and heating expense | 42,958 | 44,245 | 47,269
Repairs and maintenance expense | 2,544,901 | 2,298,854 | 2,219,248
Ordinary development expense | 700,642 | 735,715 | 723,888
Travel expense | 71,689 | 84,233 | 81,427
Clothing expense | 22,950 | 16,908 | 14,476
Survey and analysis expense | 4,572 | 4,797 | 4,634
Membership fee | 14,404 | 13,699 | 12,606
Power purchase | 15,725,220 | 18,269,732 | 18,307,289
Disclosure - Other selling and administrative expenses |  |  |
Others | 1,978,202 | 2,763,479 | 2,318,435
General and administrative expenses | 2,678,443 | 2,669,576 | 2,627,890
Cost of sales | 51,804,596 | 57,779,835 | 58,207,721
Total expenses, by nature | 54,483,039 | 60,449,411 | 60,835,611
Selling and administrative expense |  |  |
Expenses by nature [Line Items] |  |  |
Raw materials used | 0 | 0 | 0
Salaries | 1,095,183 | 775,204 | 757,819
Retirement benefits expense | 103,967 | 157,272 | 65,107
Welfare and benefit expense | 155,071 | 120,463 | 132,089
Insurance expense | 10,178 | 12,427 | 12,181
Depreciation | 218,103 | 232,510 | 214,499
Amortization of intangible assets | 87,086 | 76,547 | 54,153
Bad debt expense | 20,648 | (12,719) | 39,784
Commission | 368,275 | 632,849 | 714,096
Advertising expense | 29,559 | 34,453 | 30,894
Training expense | 5,196 | 7,174 | 6,277
Vehicle maintenance expense | 9,435 | 9,525 | 10,148
Publishing expense | 3,677 | 3,414 | 3,307
Business promotion expense | 3,614 | 3,038 | 2,785
Rent expense | 36,337 | 40,505 | 42,851
Telecommunication expense | 8,686 | 8,451 | 23,505
Transportation expense | 1,007 | 865 | 686
Taxes and dues | 62,828 | 58,666 | 46,424
Expendable supplies expense | 8,029 | 6,682 | 6,166
Water, light and heating expense | 11,749 | 11,867 | 12,629
Repairs and maintenance expense | 79,185 | 88,576 | 62,580
Ordinary development expense | 197,436 | 224,463 | 215,494
Travel expense | 10,793 | 15,652 | 14,363
Clothing expense | 14,834 | 9,369 | 10,108
Survey and analysis expense | 826 | 848 | 705
Membership fee | 1,274 | 969 | 1,043
Power purchase | 0 | 0 | 0
Disclosure - Other selling and administrative expenses |  |  |
Accommodation development expenses | 30,889 | 53,945 | 52,822
Miscellaneous wages | 45,887 | 39,794 | 32,447
Litigation and filing expenses | 19,341 | 21,768 | 12,853
Compensation for damages | 8,374 | (1,924) | 19,193
Outsourcing expenses | 3,610 | 3,293 | 3,036
Reward expenses | 3,228 | 2,858 | 2,713
Overseas market development expenses | 1,218 | 1,997 | 1,361
Others | 22,920 | 28,775 | 23,772
Others | 135,467 | 150,506 | 148,197
General and administrative expenses | 2,678,443 | 2,669,576 | 2,627,890
Total expenses, by nature | ₩ 2,678,443 | ₩ 2,669,576 | ₩ 2,627,890

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- Definition The amount of expense arising from advertising. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of amortisation expense. Amortisation is the systematic allocation of depreciable amounts of intangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of purchased energy that was sold during the period and recognised as an expense. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_99&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_103&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of impairment loss or reversal of impairment loss recognised in profit or loss for trade receivables. [Refer: Impairment loss recognised in profit or loss; Reversal of impairment loss recognised in profit or loss; Trade receivables] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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