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Statements of Cash Flows - Summary of Significant Non-cash Transactions (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Cash Flow Statement [Abstract] |  |  |
Reclassification of prepayment to intangible assets | ₩ 72 | ₩ 120 |
Increase (Decrease) of accounts payables relating to the acquisition of software | 1,144 | 33 | ₩ 226
Acquisitions of right-of-use assets | ₩ 3,784 | ₩ 2,637 |

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- Definition Increase (decrease) of accounts payables relating to the acquisition of software. + References No definition available. + Details
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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 53 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_h&doctype=Standard -URIDate 2020-01-01 + Details
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