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Property, Plant and Equipment, Net - Summary of Changes in Right-of-use Assets Property Plant and Equipment (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | ₩ 1,115,474 |
Right of use assets Acquisitions | 646,356 | ₩ 132,219
Depreciation | (208,289) | (184,022)
Impairment loss |  | (1,994)
Others | (36,010) | (365)
Ending balance | 1,517,531 | 1,115,474
Land [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 348,918 |
Right of use assets Acquisitions | 15,560 | 1,542
Depreciation | (16,154) | (17,501)
Impairment loss |  | (1,994)
Others | (22,092) | 3,082
Ending balance | 326,232 | 348,918
Buildings and structures [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 154,747 |
Right of use assets Acquisitions | 119,586 | 58,116
Depreciation | (55,532) | (54,092)
Impairment loss |  | 0
Others | (25,018) | (643)
Ending balance | 193,783 | 154,747
Machinery and equipment [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 346,642 |
Right of use assets Acquisitions | 29,687 | 37,204
Depreciation | (64,748) | (47,797)
Impairment loss |  | 0
Others | 20,540 | 1,631
Ending balance | 332,121 | 346,642
Vehicles [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 45,071 |
Right of use assets Acquisitions | 15,832 | 12,501
Depreciation | (21,623) | (20,291)
Impairment loss |  | 0
Others | 1,489 | 4,633
Ending balance | 40,769 | 45,071
Ships [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 196,070 |
Right of use assets Acquisitions | 264,508 | 0
Depreciation | (33,792) | (24,684)
Impairment loss |  | 0
Others | 0 | 0
Ending balance | 426,786 | 196,070
Others [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 24,026 |
Right of use assets Acquisitions | 201,183 | 22,856
Depreciation | (16,440) | (19,657)
Impairment loss |  | 0
Others | (10,929) | (9,068)
Ending balance | 197,840 | 24,026
Date of initial application IFRS-16 [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 1,115,474 | 1,169,636
Ending balance |  | 1,115,474
Date of initial application IFRS-16 [member] | Land [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 348,918 | 363,789
Ending balance |  | 348,918
Date of initial application IFRS-16 [member] | Buildings and structures [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 154,747 | 151,366
Ending balance |  | 154,747
Date of initial application IFRS-16 [member] | Machinery and equipment [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 346,642 | 355,604
Ending balance |  | 346,642
Date of initial application IFRS-16 [member] | Vehicles [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 45,071 | 48,228
Ending balance |  | 45,071
Date of initial application IFRS-16 [member] | Ships [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | 196,070 | 220,754
Ending balance |  | 196,070
Date of initial application IFRS-16 [member] | Others [member] |  |
Disclosure details of changes in right-of-use assets property plant and equipment [line items] |  |
Beginning Balance | ₩ 24,026 | 29,895
Ending balance |  | ₩ 24,026

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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2025-01-01 -Paragraph 53 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2025-en-r&anchor=para_53_h&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 115 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_115_g&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 115 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_115_g&doctype=Standard -URIDate 2025-03-27 + Details
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