Capital - Summary of Retained Earnings (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2021	Dec. 31, 2020
Contract Assets And Contract Liabilities [Line Items]
Unappropriated retained earnings	₩ 213,318	₩ 147,371

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

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