Capital - Schedule of Retained Earnings (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Contract Assets And Contract Liabilities [Line Items]
Unappropriated retained earnings	₩ 580,882	₩ 513,418

A component of equity representing the entity's cumulative undistributed earnings or deficit.

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