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Details in number of outstanding capital stock (Details) - ₩ / shares | Dec. 31, 2020 | Dec. 31, 2019
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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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- Definition The number of shares authorised. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 79 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of shares issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106_d&doctype=Standard -URIDate 2020-01-01 + Details
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