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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
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