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Income Taxes - Summary of Deductible Temporary Differences, Tax Losses and Unused Tax Credits for Which No Deferred Income Tax Assets Were Recognized (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of temporary difference, unused tax losses and unused tax credits [abstract] |  |
Deductible temporary differences and others | ₩ 1,416,650 | ₩ 1,811,062

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