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Contributed Capital - Summary of Details in Number of Outstanding Capital Stock (Details) - ₩ / shares | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of classes of share capital [line items] |  |  |
Number of shares outstanding | 641,964,077 | 641,964,077 | 641,964,077
Ordinary shares [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Shares authorized | 1,200,000,000 | 1,200,000,000 |
Shares issued | 641,964,077 | 641,964,077 |
Par value per share | ₩ 5,000 | ₩ 5,000 |
Number of shares outstanding | 641,964,077 | 641,964,077 | 641,964,077

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