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Related Party Transactions - Summary of Related Parties Outstanding Balances of Receivables and Payables (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of transactions between related parties [line items]    
Payables ₩ 8,824  
Trade receivables [member]    
Disclosure of transactions between related parties [line items]    
Receviables 4,572 ₩ 6,000
Trade receivables [member] | K Bank Inc.[Member]    
Disclosure of transactions between related parties [line items]    
Receviables 682 821
Trade receivables [member] | IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member]    
Disclosure of transactions between related parties [line items]    
Receviables   4,614
Trade receivables [member] | Others [member]    
Disclosure of transactions between related parties [line items]    
Receviables 2,285 565
Trade receivables [member] | Little Big Pictures [Member]    
Disclosure of transactions between related parties [line items]    
Receviables 1,454  
Trade receivables [member] | K-Realty 11th Real Estate Investment Trust Company [Member]    
Disclosure of transactions between related parties [line items]    
Receviables 151  
Trade payables [member]    
Disclosure of transactions between related parties [line items]    
Payables 3,235  
Trade payables [member] | Others [member]    
Disclosure of transactions between related parties [line items]    
Payables 3,235  
Other payables [member]    
Disclosure of transactions between related parties [line items]    
Payables 3,240 5,342
Other payables [member] | K Bank Inc.[Member]    
Disclosure of transactions between related parties [line items]    
Payables 299 513
Other payables [member] | Others [member]    
Disclosure of transactions between related parties [line items]    
Payables 2,932 4,829
Other payables [member] | Little Big Pictures [Member]    
Disclosure of transactions between related parties [line items]    
Payables 9  
Other payables [member] | K-Realty 11th Real Estate Investment Trust Company [Member]    
Disclosure of transactions between related parties [line items]    
Payables 8,824  
Trade Payable [Member]    
Disclosure of transactions between related parties [line items]    
Payables   343
Trade Payable [Member] | Others [member]    
Disclosure of transactions between related parties [line items]    
Payables   343
Other Receivables [member]    
Disclosure of transactions between related parties [line items]    
Receviables 267,929 53,275
Other Receivables [member] | K Bank Inc.[Member]    
Disclosure of transactions between related parties [line items]    
Receviables 258,999 51,422
Other Receivables [member] | Others [member]    
Disclosure of transactions between related parties [line items]    
Receviables 2 ₩ 1,853
Other Receivables [member] | Little Big Pictures [Member]    
Disclosure of transactions between related parties [line items]    
Receviables 7,645  
Other Receivables [member] | K-Realty 11th Real Estate Investment Trust Company [Member]    
Disclosure of transactions between related parties [line items]    
Receviables ₩ 1,283