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Dividend - Additional Information (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of Dividends [abstract]
Dividends paid	₩ 269,766	₩ 269,659	₩ 245,097
Dividends paid per share	₩ 1,100	₩ 1,100	₩ 1,000
Dividends declared	₩ 326,487
Dividends declared per share	₩ 1,350

X

- Definition

The amount of dividends paid by the entity on ordinary shares. [Refer: Ordinary shares [member]]

+ References

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-IssueDate 2020-01-01
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X

- Definition

The amount of dividends paid per ordinary share.

+ References

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X

- Definition

The amount of dividends proposed or declared after the reporting period but before financial statements are authorised for issue. Such dividends are not recognised as a liability at the end of the reporting period because no obligation exists at that time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount, per share, of dividends proposed or declared before financial statements were authorised for issue but not recognised as distribution to owners.

+ References

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-Name IAS
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X

- Definition

Disclosure of dividends.

+ References

No definition available.

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