Accumulated Other Comprehensive Income and Other Components of Equity - Schedule of Treasury Stock (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Miscellaneous equity [abstract]
Number of shares (in shares)	10,926,622	6,188,739
Amounts (in millions of Korean won)	₩ 461,135	₩ 215,210

An entity’s own equity instruments, held by the entity or other members of the consolidated group.

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