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Inventories - Summary of Inventories (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Inventories [Line Items] |  |
Raw materials | ₩ 4,912,677 | ₩ 4,623,251
Merchandise | 1,733 | 335
Work-in-progress | 220,110 | 187,304
Finished goods | 95,760 | 97,215
Supplies | 3,358,831 | 2,930,978
Inventories-in-transit | 1,160,238 | 1,021,797
Other inventories | 19,887 | 14,735
Total Inventories | 9,769,236 | 8,875,615
Acquisition cost |  |
Inventories [Line Items] |  |
Raw materials | 4,914,250 | 4,624,638
Merchandise | 1,733 | 335
Work-in-progress | 220,110 | 187,304
Finished goods | 96,390 | 97,272
Supplies | 3,358,831 | 2,930,978
Inventories-in-transit | 1,160,238 | 1,021,797
Other inventories | 19,887 | 14,735
Total Inventories | 9,771,439 | 8,877,059
Valuation allowance |  |
Inventories [Line Items] |  |
Raw materials | (1,573) | (1,387)
Merchandise | 0 | 0
Work-in-progress | 0 | 0
Finished goods | (630) | (57)
Supplies | 0 | 0
Inventories-in-transit | 0 | 0
Other inventories | 0 | 0
Total Inventories | ₩ (2,203) | ₩ (1,444)

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- Definition A classification of current inventory representing the amount of inventories in transit. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 2 -IssueDate 2024-01-01 -Paragraph 37 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_37&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition A classification of current inventory representing the amount of goods that have completed the production process and are held for sale in the ordinary course of business. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 2 -IssueDate 2024-01-01 -Paragraph 37 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_37&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 78 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of current inventories. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2024-01-01 -Paragraph 36 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_36_b&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_g&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 68 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_68&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition A classification of current inventory representing the amount of goods acquired for resale. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 2 -IssueDate 2024-01-01 -Paragraph 37 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_37&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 78 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of inventory that the entity does not separately disclose in the same statement or note. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 2 -IssueDate 2024-01-01 -Paragraph 37 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_37&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition A classification of current inventory representing the amount of assets to be consumed in the production process or in the rendering of services. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 2 -IssueDate 2024-01-01 -Paragraph 37 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_37&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 78 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition A classification of current inventory representing the amount of interchangeable parts that are kept in an inventory and are used for the repair or replacement of failed parts. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 2 -IssueDate 2024-01-01 -Paragraph 37 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_37&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition A classification of current inventory representing the amount of assets currently in production, which require further processes to be converted into finished goods or services. [Refer: Current finished goods; Inventories] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 2 -IssueDate 2024-01-01 -Paragraph 37 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_37&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 78 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_c&doctype=Standard -URIDate 2024-03-27 + Details
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