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Share-based Payments - Summary of Changes in the Number of Stock Options and the Weighted-Average Exercise Price (Parenthetical) (Detail) - ₩ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Weighted average exercise price of share options exercised	₩ 25,486	₩ 27,482

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- References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The weighted average exercise price of share options exercised in a share-based payment arrangement. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 45
-Subparagraph b
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_iv&doctype=Standard
-URIDate 2020-01-01

+ Details

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Data Type:	num:perShareItemType
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