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Related Parties - Summary of Borrowings Arising From Related Party Transactions (Details) - Korea Development Bank
₩ in Millions
 12 Months Ended
Dec. 31, 2023
KRW (₩)
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance ₩ 222,497
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 504,095
Repayment (459,165)
Others 58,594
Ending balance 326,021
Facility  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 96,584
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 0
Repayment (12,387)
Others 906
Ending balance 85,103
Others  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 2,133
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 0
Repayment (375)
Others 0
Ending balance 1,758
Operating funds  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 62,433
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 478,394
Repayment (442,027)
Others 21,200
Ending balance 120,000
Syndicated Loans  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 12,455
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 0
Repayment (978)
Others (529)
Ending balance 10,948
EBL  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 48,892
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 25,701
Repayment (3,398)
Others 37,017
Ending balance ₩ 108,212