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v3.19.1

Details in number of outstanding capital stock (Details) - ₩ / shares | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of classes of share capital [Abstract] |  |
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

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