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Intangible Assets - Summary of Classification of Amortization in Statements of Comprehensive Income (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Intangible Assets [Line Items] |  |  |
Amortization | ₩ 1,137 | ₩ 905 | ₩ 868
Cost of Revenues |  |  |
Disclosure Of Intangible Assets [Line Items] |  |  |
Amortization | 479 | 101 | 251
Selling, General and Administrative Expenses |  |  |
Disclosure Of Intangible Assets [Line Items] |  |  |
Amortization | 597 | 745 | 581
Research and Development |  |  |
Disclosure Of Intangible Assets [Line Items] |  |  |
Amortization | ₩ 61 | ₩ 59 | ₩ 36

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- Definition The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph e -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e_vi&doctype=Standard -URIDate 2020-01-01 + Details
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