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Related Parties - Summary of Derivatives Transactions With Related Parties (Details) - 12 months ended Dec. 31, 2023 - Korea Development Bank
SFr in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions
KRW (₩)
USD ($)
HKD ($)
CHF (SFr)
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2019~2024 2019~2024 2019~2024 2019~2024
Pay, Contract Amount ₩ 177,600      
Receive, Contract Amount | $   $ 150,000    
Contract Interest rate Pay 1.24 1.24 1.24 1.24
Contract Interest rate Receive 2.50 2.50 2.50 2.50
Contract exchange rate 1,184 1,184 1,184 1,184
Cross Currency Forward Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Pay, Contract Amount ₩ 10,383      
Receive, Contract Amount | $   $ 8,000    
Contract exchange rate 1,297.9 1,297.9 1,297.9 1,297.9
Contract date Dec. 20, 2023 Dec. 20, 2023 Dec. 20, 2023 Dec. 20, 2023
Matrurity date Jan. 15, 2024 Jan. 15, 2024 Jan. 15, 2024 Jan. 15, 2024
Cross Currency Forward Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Pay, Contract Amount ₩ 14,303      
Receive, Contract Amount | $   $ 11,000    
Contract exchange rate 1,300.3 1,300.3 1,300.3 1,300.3
Contract date Dec. 01, 2023 Dec. 01, 2023 Dec. 01, 2023 Dec. 01, 2023
Matrurity date Jan. 15, 2024 Jan. 15, 2024 Jan. 15, 2024 Jan. 15, 2024
Cross Currency Forward Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Pay, Contract Amount ₩ 11,617      
Receive, Contract Amount | $   $ 9,000    
Contract exchange rate 1,290.8 1,290.8 1,290.8 1,290.8
Contract date Dec. 15, 2023 Dec. 15, 2023 Dec. 15, 2023 Dec. 15, 2023
Matrurity date Feb. 14, 2024 Feb. 14, 2024 Feb. 14, 2024 Feb. 14, 2024
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2020~2025 2020~2025 2020~2025 2020~2025
Pay, Contract Amount ₩ 241,320      
Receive, Contract Amount | $   $ 200,000    
Contract Interest rate Pay 0.54 0.54 0.54 0.54
Contract Interest rate Receive 1.13 1.13 1.13 1.13
Contract exchange rate 1,206.6 1,206.6 1,206.6 1,206.6
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2021~2026 2021~2026 2021~2026 2021~2026
Pay, Contract Amount ₩ 118,170      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 1.11 1.11 1.11 1.11
Contract Interest rate Receive 1.13 1.13 1.13 1.13
Contract exchange rate 1,181.7 1,181.7 1,181.7 1,181.7
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2022~2026 2022~2026 2022~2026 2022~2026
Pay, Contract Amount ₩ 283,820      
Receive, Contract Amount | $   $ 200,000    
Contract Interest rate Pay 4.67 4.67 4.67 4.67
Contract Interest rate Receive 5.38 5.38 5.38 5.38
Contract exchange rate 1,419.1 1,419.1 1,419.1 1,419.1
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2022~2028 2022~2028 2022~2028 2022~2028
Pay, Contract Amount ₩ 283,820      
Receive, Contract Amount | $   $ 200,000    
Contract Interest rate Pay 5.12 5.12 5.12 5.12
Contract Interest rate Receive 5.50 5.50 5.50 5.50
Contract exchange rate 1,419.1 1,419.1 1,419.1 1,419.1
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2023~2026 2023~2026 2023~2026 2023~2026
Pay, Contract Amount ₩ 256,000      
Receive, Contract Amount | $   $ 200,000    
Contract Interest rate Pay 4.04 4.04 4.04 4.04
Contract Interest rate Receive 5.38 5.38 5.38 5.38
Contract exchange rate 1,280 1,280 1,280 1,280
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2015~2025 2015~2025 2015~2025 2015~2025
Pay, Contract Amount ₩ 111,190      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 2.62 2.62 2.62 2.62
Contract Interest rate Receive 3.25 3.25 3.25 3.25
Contract exchange rate 1,111.9 1,111.9 1,111.9 1,111.9
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2017~2027 2017~2027 2017~2027 2017~2027
Pay, Contract Amount ₩ 111,610      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 2.31 2.31 2.31 2.31
Contract Interest rate Receive 3.13 3.13 3.13 3.13
Contract exchange rate 1,116.1 1,116.1 1,116.1 1,116.1
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2018~2028 2018~2028 2018~2028 2018~2028
Pay, Contract Amount ₩ 108,600      
Receive, Contract Amount | $     $ 800,000  
Contract Interest rate Pay 2.69 2.69 2.69 2.69
Contract Interest rate Receive 3.35 3.35 3.35 3.35
Contract exchange rate 135.75 135.75 135.75 135.75
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2019~2027 2019~2027 2019~2027 2019~2027
Pay, Contract Amount ₩ 119,978      
Receive, Contract Amount | SFr       SFr 100,000
Contract Interest rate Pay 1.43 1.43 1.43 1.43
Contract Interest rate Receive 0.05 0.05 0.05 0.05
Contract exchange rate 1,199.78 1,199.78 1,199.78 1,199.78
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2021~2026 2021~2026 2021~2026 2021~2026
Pay, Contract Amount ₩ 111,400      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 0.93 0.93 0.93 0.93
Contract Interest rate Receive 1.25 1.25 1.25 1.25
Contract exchange rate 1,114 1,114 1,114 1,114
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2022~2027 2022~2027 2022~2027 2022~2027
Pay, Contract Amount ₩ 262,000      
Receive, Contract Amount | $   $ 200,000    
Contract Interest rate Pay 3.63 3.63 3.63 3.63
Contract Interest rate Receive 4.25 4.25 4.25 4.25
Contract exchange rate 1,310 1,310 1,310 1,310
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2020~2026 2020~2026 2020~2026 2020~2026
Pay, Contract Amount ₩ 118,910      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 0.61 0.61 0.61 0.61
Contract Interest rate Receive 1.00 1.00 1.00 1.00
Contract exchange rate 1,189.1 1,189.1 1,189.1 1,189.1
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2021~2026 2021~2026 2021~2026 2021~2026
Pay, Contract Amount ₩ 114,230      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 1.27 1.27 1.27 1.27
Contract Interest rate Receive 1.25 1.25 1.25 1.25
Contract exchange rate 1,142.3 1,142.3 1,142.3 1,142.3
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2022~2027 2022~2027 2022~2027 2022~2027
Pay, Contract Amount ₩ 123,710      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 3.41 3.41 3.41 3.41
Contract Interest rate Receive 3.63 3.63 3.63 3.63
Contract exchange rate 1,237.1 1,237.1 1,237.1 1,237.1
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2022~2025 2022~2025 2022~2025 2022~2025
Pay, Contract Amount ₩ 128,560      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 3.37 3.37 3.37 3.37
Contract Interest rate Receive 4.13 4.13 4.13 4.13
Contract exchange rate 1,285.6 1,285.6 1,285.6 1,285.6
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2020~2025 2020~2025 2020~2025 2020~2025
Pay, Contract Amount ₩ 122,780      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 0.93 0.93 0.93 0.93
Contract Interest rate Receive 1.75 1.75 1.75 1.75
Contract exchange rate 1,227.8 1,227.8 1,227.8 1,227.8
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2022~2025 2022~2025 2022~2025 2022~2025
Pay, Contract Amount ₩ 252,360      
Receive, Contract Amount | $   $ 200,000    
Contract Interest rate Pay 2.83 2.83 2.83 2.83
Contract Interest rate Receive 3.60 3.60 3.60 3.60
Contract exchange rate 1,261.8 1,261.8 1,261.8 1,261.8
Cross Currency Interest Rate Contract        
Disclosure of Derivatives transactions between related parties [Line Items]        
Contract year 2023~2028 2023~2028 2023~2028 2023~2028
Pay, Contract Amount ₩ 129,500      
Receive, Contract Amount | $   $ 100,000    
Contract Interest rate Pay 3.85 3.85 3.85 3.85
Contract Interest rate Receive 4.88 4.88 4.88 4.88
Contract exchange rate 1,295 1,295 1,295 1,295