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Other Financial Assets - Summary of Changes in the Allowance for Doubtful Accounts of Loans and Receivables (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Allowance for doubtful accounts [Abstract]      
Beginning balance ₩ 52,677 ₩ 20,267 ₩ 15,094
Bad debt expense 2,180 30,942 5,173
Other (20) 1,468 0
Ending balance ₩ 54,837 ₩ 52,677 ₩ 20,267