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Retained Earnings and Dividends Paid - Summary of Changes in Reserve of Remeasurement (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans [abstract]
Beginning balance	₩ 98,844	₩ (169,234)
Changes	964,791	327,957
Income tax effect	(338,022)	(126,890)
Transfer to reserve for business expansion	(110,808)	67,011
Ending balance	₩ 614,805	₩ 98,844

X

- Definition

The amount of other comprehensive income, before tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income; Defined benefit plans [member]; Plan assets [member]; Net defined benefit liability (asset)] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2022-03-24
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2022-03-24
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard
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+ Details

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- References

No definition available.

+ Details

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X

- Definition

A component of equity representing the accumulated remeasurements of defined benefit plans. [Refer: Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 78
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_78_e&doctype=Standard
-URIDate 2022-03-24

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- Definition

Income tax effect of defined benefit plans of other comprehensive income.

+ References

No definition available.

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- Definition

Transfer to reserve for business expansion.

+ References

No definition available.

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