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Related Party Transactions - Summary of Significant Transactions with Related Parties (Detail) - KRW (₩)
₩ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of transactions between related parties [line items]      
Operating Revenue ₩ 41,925 ₩ 296,186 ₩ 18,765
Purchases 54,222 37,774 18,499
K-Realty CR-REITs No.1 [member]      
Disclosure of transactions between related parties [line items]      
Operating Revenue   238,847 2,298
Purchases   1,308  
Others [member]      
Disclosure of transactions between related parties [line items]      
Operating Revenue 11,964 28,092 809
Purchases 37,742 21,302 10,272
K Bank [member]      
Disclosure of transactions between related parties [line items]      
Operating Revenue 29,536 24,247 15,658
Purchases 11,007 15,164 ₩ 8,227
IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member]      
Disclosure of transactions between related parties [line items]      
Operating Revenue   5,000  
Purchases   ₩ 0  
Hyundai Robotics Co., Ltd [Member]      
Disclosure of transactions between related parties [line items]      
Operating Revenue 94    
Purchases 3,799    
Digital Pharm Co., Ltd [Member]      
Disclosure of transactions between related parties [line items]      
Operating Revenue 1    
K-Realty 11th Real Estate Investment Trust Company [Member]      
Disclosure of transactions between related parties [line items]      
Operating Revenue 330    
Purchases ₩ 1,674