Derivatives - Summary of Derivative Financial Instruments (Parenthetical) (Details) - KRW (₩) ₩ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivatives [Line Items]
Net gain (loss) on valuation of derivatives designated as cash flow hedge	₩ 11,870	₩ (3,654)	₩ (24,415)
Non-current derivative financial liabilities	260,911	433,855
Hybrid Bonds [member]
Derivatives [Line Items]
Non-current derivative financial liabilities	₩ 26,422	₩ 18,752

The amount of other comprehensive income, net of tax, after reclassification adjustments, related to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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