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Borrowings and Debt Securities - Repayment Schedule of Borrowings and Debt Securities (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Repayment schedule of borrowings and debt securities [Line Items]    
Borrowings ₩ 15,435,895 ₩ 6,662,747
Debt Securities 105,366,315 74,038,770
Less than 1 year    
Repayment schedule of borrowings and debt securities [Line Items]    
Borrowings 12,458,627 4,384,266
Debt Securities 10,205,395 9,652,986
1~5 Years    
Repayment schedule of borrowings and debt securities [Line Items]    
Borrowings 1,472,655 1,013,500
Debt Securities 65,278,587 34,156,038
Over 5 Years    
Repayment schedule of borrowings and debt securities [Line Items]    
Borrowings 1,504,613 1,264,981
Debt Securities ₩ 29,882,333 ₩ 30,229,746