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Subsequent Events - Additional Information (Detail) - Conversion Of Investments In Debt Instruments Into Equity Investments As A Result Of Restructuring Of Investee [Member] - Bidiai Co Limited [Member] - Korea SouthEast Power [Member] ₩ in Billions | Feb. 17, 2023 KRW (₩)
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Disclosure of non-adjusting events after reporting period [line items] |
Investment in equity shares as a result of conersion of debt into equity of the investee company | ₩ 32
Proportion of ownership interest in associate | 32.54%

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