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Changes in retained earnings (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of Changes in retained earnings [Abstract] |  |  |
Beginning balance | ₩ 51,519,119 | ₩ 53,370,558 |
Effect of change in accounting policy | 0 | 71,928 |
Net profit (loss) for the period attributed to owner of the Company | (2,345,517) | (1,314,567) | ₩ 1,298,720
Changes in equity method retained earnings |  |  |
Beginning balance | 3,969 | 5,122 |
Ending balance | (2,820) | 3,969 | 5,122
Changes | (6,789) | (1,153) |
Remeasurements of defined benefit liability, net of tax | 36,160 | (100,495) |
Transfer of gain (loss) on valuation of financial assets through other comprehensive income | (840) | 0 |
Dividend paid | 0 | (507,152) | (1,271,089)
Ending balance | ₩ 49,202,133 | ₩ 51,519,119 | ₩ 53,370,558

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- Definition The gains (losses) recognised in other comprehensive income on financial assets measured at fair value through other comprehensive income, net of tax. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_91_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 81B -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_81B_a_ii&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50% or less owned persons accounted for by the equity method (equity method investees). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6462270&loc=d3e57205-112772 + Details
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