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Deferred Revenues (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of deferred revenue [abstract]    
Deferred Revenue, Beginning Balance ₩ 11,548,855 ₩ 10,974,845
Increase 2,924,341 1,317,061
Recognized as revenue (820,631) (743,051)
Deferred Revenue, Ending Balance ₩ 13,652,565 ₩ 11,548,855