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Income and expenses on investment property (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Income and expenses on investment property [Abstract] |  |
Rental income | ₩ 8,335 | ₩ 9,782
Operating and maintenance expenses related to rental income | (1,453) | (1,257)
Operating and maintenance expenses not related to rental income | 0 | (3,812)
Rental income from investment property, net of direct operating expense | ₩ 6,882 | ₩ 4,713

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- Definition The amount of direct operating expenses (including repairs and maintenance) arising from investment property that generated rental income during the period recognised in profit or loss. [Refer: Investment property] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2020-01-01 -Paragraph 75 -Subparagraph f -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2020-en-r&anchor=para_75_f_ii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of direct operating expenses (including repairs and maintenance) arising from investment property that did not generate rental income during the period recognised in profit or loss. [Refer: Investment property] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2020-01-01 -Paragraph 75 -Subparagraph f -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2020-en-r&anchor=para_75_f_iii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of rental income arising from investment property recognised in profit or loss. [Refer: Investment property] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2020-01-01 -Paragraph 75 -Subparagraph f -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2020-en-r&anchor=para_75_f_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of rental income arising from investment property, net of direct operating expense from such property. [Refer: Direct operating expense from investment property; Rental income from investment property] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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