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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, 2022
KRW (₩)
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance ₩ 353,324
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 302,222
Repayment (437,262)
Others 4,213
Ending balance 222,497
Facility  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 98,020
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 61,092
Repayment (64,875)
Others 2,347
Ending balance 96,584
Others  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 2,509
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 0
Repayment (376)
Others 0
Ending balance 2,133
Operating funds  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 184,300
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 164,252
Repayment (285,961)
Others (158)
Ending balance 62,433
Syndicated Loans  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 14,530
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 0
Repayment (1,040)
Others (1,035)
Ending balance 12,455
EBL  
Disclosure of Borrowings transactions between related parties [Line Items]  
Beginning balance 53,965
Changes in Borrowings transactions between related parties [Abstract]  
Borrowings 76,878
Repayment (85,010)
Others 3,059
Ending balance ₩ 48,892