Income Taxes - Summary of Deferred Income Tax Assets (Liabilities) (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets and liabilities [abstract]
Deferred tax assets	₩ 10,934,375	₩ 1,901,992
Deferred tax liabilities	(6,457,103)	(7,100,938)
Net Deferred tax assets(liabilities)	₩ 4,477,272	₩ (5,198,946)	₩ (7,367,101)

The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]]

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