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Property, Plant and Equipment, Net - Summary of Lease Expense Recognised in the Income Statement (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
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Interest on lease liabilities | ₩ 63,586 | ₩ 48,887 | ₩ 41,109
Expenses related to short-term leases | 38,639 | 53,944 | 52,486
Expenses related to leases of low-value assets | 19,346 | 25,968 | 20,103
Total | ₩ 121,571 | ₩ 128,799 | ₩ 113,698

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