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Construction Contracts (Tables) | 12 Months Ended
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Dec. 31, 2024
Construction Contracts [Abstract] |
Summary of Changes in Total Contract Amount in Which Revenue is Not Yet Recognized |
(1) | Changes in total contract amount in which revenue is not yet recognized for the years ended December 31, 2022, 2023 and 2024 are as follows:
|  |  |  |  | 2022 |
|  |  |  |  | Beginning balance |  |  | Increase (decrease) (*) |  |  | Recognized as revenue |  |  | Ending balance |
|  |  |  |  | In millions of won |
Nuclear power plant construction in overseas and others |  | ￦ |  |  |  |  | 2,783,935 |  |  |  | 3,457,964 |  |  |  | (646,953 | ) |  |  | 5,594,946 |
| (*) | For the year ended December 31, 2022, the increased balance of contracts from new orders is ￦3,578,599 million and the decreased balance of contracts due to changes in scope of construction work and foreign exchange impact is ￦81,401 million.
|  |  |  |  | 2023 |
|  |  |  |  | Beginning balance |  |  | Increase (decrease) (*) |  |  | Recognized as revenue |  |  | Ending balance |
|  |  |  |  | In millions of won |
Nuclear power plant construction in overseas and others |  | ￦ |  |  |  |  | 5,594,946 |  |  |  | 986,049 |  |  |  | (785,395 | ) |  |  | 5,795,600 |
| (*) | For the year ended December 31, 2023, the increased balance of contracts from new orders is ￦1,029,165 million and the decreased balance of contracts due to changes in scope of construction work and foreign exchange impact is ￦43,116 million.
|  |  |  |  | 2024 |
|  |  |  |  | Beginning balance |  |  | Increase (decrease) (*) |  |  | Recognized as revenue |  |  | Ending balance |
|  |  |  |  | In millions of won |
Nuclear power plant construction in overseas and others |  | ￦ |  |  |  |  | 5,795,600 |  |  |  | 1,190,281 |  |  |  | (849,108 | ) |  |  | 6,136,773 |
| (*) | For the year ended December 31, 2024, the increased balance of contracts from new orders is ￦1,299,281 million and the decreased balance of contracts due to changes in scope of construction work and foreign exchange impact is ￦109,000 million.
Summary of Accumulated Earned Revenue, Expense and Others |
(2) | Accumulated earned revenue, expense and others related to the Company’s construction contracts in progress as of December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |
|  |  |  |  | Accumulated earned revenue |  |  | Accumulated expense |  |  | Accumulated profit |  |  | Unearned advance receipts |
|  |  |  |  | In millions of won |
Nuclear power plant construction in overseas and others |  | ￦ |  |  |  |  | 22,996,785 |  |  |  | 22,382,628 |  |  |  | 614,157 |  |  |  | 74,253 |
|  |  |  |  | 2024 |
|  |  |  |  | Accumulated earned revenue |  |  | Accumulated expense |  |  | Accumulated profit |  |  | Unearned advance receipts |
|  |  |  |  | In millions of won |
Nuclear power plant construction in overseas and others |  | ￦ |  |  |  |  | 24,255,432 |  |  |  | 24,008,579 |  |  |  | 246,853 |  |  |  | 80,069 |
Summary of Gross Amount of Assets and Liabilities for Contract |
(3) | Gross amount due from customers recognized as contract assets and due to customers recognized as contract liabilities for contract work as of December 31, 2023 and 2024 are as follows:
|  |  |  |  | 2023 |  |  | 2024 |
|  |  |  |  | Contract assets (*1) |  |  | Contract liabilities (*2) |  |  | Contract assets (*1) |  |  | Contract liabilities (*2) |
|  |  |  |  | In millions of won |
Nuclear power plant construction in overseas and others |  | ￦ |  |  |  |  | 183,204 |  |  |  | 270,789 |  |  |  | 1,159,085 |  |  |  | 161,778 |
| (*1) | Included in trade and other receivables, net, in the consolidated statements of financial position.
| (*2) | Included in non-financial liabilities as advance received in the consolidated statements of financial position. The revenue recognized on December 31, 2024 from the amounts included in contract liabilities at the end of the prior year is ￦247,819 million.

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- Definition The explanation of the significant changes in the contract assets and the contract liabilities. [Refer: Contract assets; Contract liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 118 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_118&doctype=Standard -URIDate 2024-03-27 + Details
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