Categories of Financial Instruments - Financial Liabilities by Category (Detail) - KRW (₩) ₩ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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|---|---|---|---|---|---|---|---|
| Disclosure of financial liabilities [line items] | |||||||
| Accounts payable – trade | ₩ 110,867 | ₩ 126,508 | |||||
| Derivative financial liabilities | 6,403 | 3,437 | |||||
| Borrowings | 633,125 | [1] | 615,600 | ||||
| Debentures | 8,213,904 | [1] | 8,511,280 | ||||
| Lease liabilities | 1,525,798 | 1,637,951 | |||||
| Accounts payable - other and others | 3,506,048 | [2] | 5,018,850 | ||||
| Financial liabilities | 13,996,145 | 15,913,626 | |||||
| Financial liabilities at fair value through profit or loss [member] | |||||||
| Disclosure of financial liabilities [line items] | |||||||
| Derivative financial liabilities | 5,782 | 2,689 | |||||
| Financial liabilities | 5,782 | 2,689 | |||||
| Financial liabilities measured at amortized cost [Member] | |||||||
| Disclosure of financial liabilities [line items] | |||||||
| Accounts payable – trade | 110,867 | 126,508 | |||||
| Borrowings | 633,125 | 615,600 | |||||
| Debentures | 8,213,904 | 8,511,280 | |||||
| Lease liabilities | 1,525,798 | 1,637,951 | |||||
| Accounts payable - other and others | 3,506,048 | 5,018,850 | |||||
| Financial liabilities | 13,989,742 | 15,910,189 | |||||
| Derivatives hedging instrument [member] | |||||||
| Disclosure of financial liabilities [line items] | |||||||
| Derivative financial liabilities | 621 | 748 | |||||
| Financial liabilities | ₩ 621 | ₩ 748 | |||||
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