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Inventories - Summary of Inventories Net (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of inventories [line items]    
Inventories ₩ 717,673 ₩ 514,145
Merchandise [member]    
Disclosure of inventories [line items]    
Inventories 672,738 481,056
Others [member]    
Disclosure of inventories [line items]    
Inventories 44,935 33,089
Gross carrying amount [member]    
Disclosure of inventories [line items]    
Inventories 813,683 634,449
Gross carrying amount [member] | Merchandise [member]    
Disclosure of inventories [line items]    
Inventories 768,748 601,360
Gross carrying amount [member] | Others [member]    
Disclosure of inventories [line items]    
Inventories 44,935 33,089
Valuation allowance [member]    
Disclosure of inventories [line items]    
Inventories (96,010) (120,304)
Valuation allowance [member] | Merchandise [member]    
Disclosure of inventories [line items]    
Inventories ₩ (96,010) ₩ (120,304)