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Gain (loss) from Disposals of subsidiaries (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
gain (loss) of Disposaled subsidiaries |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries | [1] | ₩ (6,610) | ₩ (256) | ₩ 72
Fair value of Disposaled subsidiaries |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 1,473 | 4 | 160
Consideration received in cash |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 389 | 4 | 160
Net assets transferred due to liquidation |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 1,084 | 0 | 0
Carrying value of Disposaled subsidiaries |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 7,827 | 73 | 158
Cash and Cash Equivalents |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 1,656 | 97 | 175
Trade receivables |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 395 | 0 | 11
Inventories |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 2,801 | 0 | 0
Other non-financial assets |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 98 | 1 | 0
PP&E and intangible assets |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 3,812 | 2 | 0
Trade and other payables |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | (935) | (3) | (28)
Other non-financial liabilities |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 0 | (24) | 0
Realization of unrealized gain |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | 0 | (187) | 70
Other comprehensive income (loss) (cumulative foreign currency translation of foreign operations) |  |  |  |
Disclosure of Gain (loss) of Disposaled subsidiaries [Line Items] |  |  |  |
gain (loss) of Disposaled subsidiaries |  | ₩ 256 | ₩ 0 | ₩ 0
[1] | Gain (loss) on disposals of subsidiaries is included in the 'Gain (loss) on disposal of investments in subsidiaries' the consolidated statements of comprehensive income (loss).

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