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Risk Management - Summary of Sensitivity Analysis for Interest Rates (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Increase (decrease) of income before income tax |  |  |
Disclosure Of Sensitivity Analysis For Interest Rates [Line Items] |  |  |
1% Increase |  | ₩ (30,548) | ₩ (26,138)
1% Decrease |  | 30,548 | 26,138
Increase (decrease) of shareholder's equity |  |  |
Disclosure Of Sensitivity Analysis For Interest Rates [Line Items] |  |  |
1% Increase | [1] | (30,548) | (26,138)
1% Decrease | [1] | ₩ 30,548 | ₩ 26,138
[1] | The effect on the shareholders’ equity excluding the impact of income taxes.

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