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Borrowings and Debt Securities - Schedule of Changes in Borrowings and Debt Securities (Details) - KRW (₩)
₩ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Changes In Borrowings and Debt Securities [Line Items]    
Beginning balance ₩ 120,605,365  
Ending balance 133,631,830 ₩ 120,605,365
Borrowings and debt securities    
Changes In Borrowings and Debt Securities [Line Items]    
Beginning balance 120,605,365 80,529,513
Cash flows 12,692,924 39,193,816
Effect of exchange rate fluctuations 335,353 906,877
Others (1,812) (24,841)
Ending balance ₩ 133,631,830 ₩ 120,605,365