Intangible Assets - Changes in Intangible Assets (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Development Projects [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [Line Items]
Impairment loss on intangible assets	₩ 54,184	₩ 66,028

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

No definition available.

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