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Statements of Cash Flows - Summary of Significant Non-cash Transactions (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	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

X

- Definition

Disclosure of cash flow statement.

+ References

No definition available.

+ Details

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- Definition

Increase (decrease) of accounts payables relating to the acquisition of software.

+ References

No definition available.

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- Definition

Reclassification of prepayments to intangible assets.

+ References

No definition available.

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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

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