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Accounts and Other Receivables - Summary of Changes in Loss Allowance of Accounts and Other Receivables (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Trade And Other Receivables [Line Items] |  |  |
Bad debt expenses | ₩ 713 | ₩ 281 | ₩ 151
Reversal of allowance for doubtful accounts | (50) | (34) |
Accounts Receivables |  |  |
Trade And Other Receivables [Line Items] |  |  |
Beginning balance | 165 | 22 | 123
Bad debt expenses | 712 | 281 | 55
Reversal of allowance for doubtful accounts | (50) |  |
Write-off | (248) | (138) | (156)
Ending balance | 579 | 165 | 22
Other Receivables |  |  |
Trade And Other Receivables [Line Items] |  |  |
Beginning balance | 4 | 84 | 46
Bad debt expenses | 1 |  | 40
Reversal of allowance for doubtful accounts |  | (34) |
Write-off |  | (46) | (2)
Ending balance | ₩ 5 | ₩ 4 | ₩ 84

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- Definition Bad debt expense. + References No definition available. + Details
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- Definition Reversal of allowance for doubtful accounts - others. + References No definition available. + Details
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- Definition The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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- Definition The decrease in an allowance account for credit losses of financial assets resulting from the utilisation of the allowance. [Refer: Allowance account for credit losses of financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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- Details
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- Details
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