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Significant Accounting Policies - Additional Information (Details) - KRW (₩)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Significant Accounting Policies [Abstract]
Transfers of financial assets	₩ 0	₩ 0	₩ 0
Common stock equivalents outstanding	0	0

X

- Definition

Disclosure of significant accounting policies.

+ References

No definition available.

+ Details

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- Definition

The fair value of transferred financial assets that are not derecognised in their entirety. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 42D
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_42D_d&doctype=Standard
-URIDate 2020-01-01

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X

- Definition

The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 79
-Subparagraph a
-Clause iv
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-URIDate 2020-01-01

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