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Risk Management - Summary of Sensitivity Analysis for Foreign Currency Exchange 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 foreign currency exchange rates [Line Items] |  |  |
10% Increase |  | ₩ (1,439,185) | ₩ (1,336,821)
10% Decrease |  | 1,439,185 | 1,336,821
Increase (decrease) of equity |  |  |
Disclosure of sensitivity analysis for foreign currency exchange rates [Line Items] |  |  |
10% Increase | [1] | (1,439,185) | (1,336,821)
10% Decrease | [1] | ₩ 1,439,185 | ₩ 1,336,821
[1] | The effect on the shareholders’ equity excluding the impact of income taxes.

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