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Deferred Income Tax and Income Tax Expense - Summary of Analysis of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred income tax assets ₩ 579,090 ₩ 423,728
Deferred income tax liabilities (967,650) (643,958)
Gross carrying amount [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred income tax assets 2,306,400 2,152,442
Deferred income tax liabilities (2,694,960) (2,372,672)
Gross carrying amount [member] | Less than 1 year [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred income tax assets 398,710 398,329
Deferred income tax liabilities (586,522) (642,954)
Gross carrying amount [member] | Over 12 months [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred income tax assets 1,907,690 1,754,113
Deferred income tax liabilities ₩ (2,108,438) ₩ (1,729,718)