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Related Party Transactions - Summary of Transactions Prior Liquidation (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement [Line Items]      
Payables ₩ 8,824    
Acquisition of right of use assets [member]      
Statement [Line Items]      
Dividend Income 1,966    
Acquisition of right of use assets [member] | KRealty 11th Real Estate Investment Trust Company [Member]      
Statement [Line Items]      
Dividend Income 1,966    
Interest Expense [member]      
Statement [Line Items]      
Payables 260 ₩ 205 ₩ 917
Interest Expense [member] | K-Realty CR-REITs No.1 [member]      
Statement [Line Items]      
Payables   205 917
Interest Expense [member] | KRealty 11th Real Estate Investment Trust Company [Member]      
Statement [Line Items]      
Payables 260    
Dividend Income [member]      
Statement [Line Items]      
Dividend Income 54,869 48,779 17,345
Dividend Income [member] | K-Realty CR-REITs No.1 [member]      
Statement [Line Items]      
Dividend Income 45,549 40,142 8,061
Dividend Income [member] | Others [member]      
Statement [Line Items]      
Dividend Income 9,158 8,637 43
Dividend Income [member] | Korea Information & Technology Investment Fund (KIF Investment Fund) [member]      
Statement [Line Items]      
Dividend Income     9,241
Dividend Income [member] | KRealty 11th Real Estate Investment Trust Company [Member]      
Statement [Line Items]      
Dividend Income 162    
Interest income [member]      
Statement [Line Items]      
Dividend Income 3,052 223 14
Interest income [member] | K Bank Inc.[Member]      
Statement [Line Items]      
Dividend Income ₩ 3,052   ₩ 14
Interest income [member] | Korea Information & Technology Investment Fund (KIF Investment Fund) [member]      
Statement [Line Items]      
Dividend Income   ₩ 223