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Financial Instruments - Contractual Maturities for Non-derivative Financial Liabilities (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Trade accounts and notes payable, book value | ₩ 5,106,921 |
Borrowings, book value | 28,492,000 | ₩ 25,997,367
Financial guarantee liabilities, book value | 18,135 |
Lease liabilities book value | 1,340,654 |
Other payables book value | 2,734,725 |
Non-derivative financial liabilities, book value | 37,692,435 |
Trade accounts and notes payable, contractual cash flow | 5,106,921 |
Borrowings, contractual cash flow | 33,051,735 |
Financial guarantee liabilities, contractual cash flow | 3,613,477 |
Lease liabilities contractual cash flows | 1,719,521 |
Other payables, contractual cash flow | 2,734,965 |
Non-derivative financial liabilities, contractual cash flow | 46,226,619 |
Within 1 year [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Trade accounts and notes payable, contractual cash flow | 5,106,921 |
Borrowings, contractual cash flow | 12,722,356 |
Financial guarantee liabilities, contractual cash flow | 3,613,477 |
Lease liabilities contractual cash flows | 207,565 |
Other payables, contractual cash flow | 2,657,699 |
Non-derivative financial liabilities, contractual cash flow | 24,308,018 |
1 year - 5 years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Borrowings, contractual cash flow | 17,945,996 |
Lease liabilities contractual cash flows | 649,154 |
Other payables, contractual cash flow | 77,266 |
Non-derivative financial liabilities, contractual cash flow | 18,672,416 |
After 5 years [member] |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Borrowings, contractual cash flow | 2,383,383 |
Lease liabilities contractual cash flows | 862,802 |
Non-derivative financial liabilities, contractual cash flow | ₩ 3,246,185 |

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- Definition The amount of financial liabilities at amortised cost. The amortised cost is the amount at which financial liabilities are measured at initial recognition minus principal repayments, plus or minus the cumulative amortisation using the effective interest method of any difference between that initial amount and the maturity amount. [Refer: Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2025-01-01 -Paragraph 8 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_8_g&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 44 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_44_d&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 44 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_44_d&doctype=Standard -URIDate 2025-03-27 + Details
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