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Accounts and Other Receivables - Summary of Changes in Loss Allowance of Accounts and Other Receivables (Details) - Loss allowance - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accounts receivable |  |  |
Trade And Other Receivables [Line Items] |  |  |
Financial assets at amortised cost beginning balance | ₩ 319 | ₩ 689 | ₩ 579
Bad debt expenses | 1,402 | 701 | 933
Reversal of allowance for doubtful accounts | 0 | 0 | (132)
Write-off | (1,095) | (1,071) | (691)
Financial assets at amortised cost ending balance | 626 | 319 | 689
Other receivables |  |  |
Trade And Other Receivables [Line Items] |  |  |
Financial assets at amortised cost beginning balance | 5 | 5 | 5
Bad debt expenses | 0 | 0 | 0
Reversal of allowance for doubtful accounts | 0 | 0 | 0
Write-off | 0 | 0 | 0
Financial assets at amortised cost ending balance | ₩ 5 | ₩ 5 | ₩ 5

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