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v3.23.1

Statement of Cash Flows - Summary of Significant Non-cash Activities (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Transfer from construction-in-progress to other assets |  |  |
Non Cash Transactions [Line Items] |  |  |
Non-cash transactions | ₩ 13,723,972 | ₩ 12,902,589 | ₩ 10,189,527
Recognition of asset retirement cost and related provision for decommissioning costs |  |  |
Non Cash Transactions [Line Items] |  |  |
Non-cash transactions | 3,497,866 | 2,356,805 | 895,507
Transfer from provision for disposal of spent nuclear fuel to accrued expenses |  |  |
Non Cash Transactions [Line Items] |  |  |
Non-cash transactions | 417,687 | 455,401 | 395,921
Transfer from long-term borrowings and debt securities to current portion of long-term borrowings and debt securities |  |  |
Non Cash Transactions [Line Items] |  |  |
Non-cash transactions | 13,838,578 | 11,109,271 | 9,237,883
Transfer from inventory to stored nuclear fuel |  |  |
Non Cash Transactions [Line Items] |  |  |
Non-cash transactions | 738,720 | 908,842 | 1,055,974
Transfer of right-of-use assets due to change in accounting policy and others |  |  |
Non Cash Transactions [Line Items] |  |  |
Non-cash transactions | ₩ 197,016 | ₩ 78,213 | ₩ 291,334

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- Definition Adjustments for non-cash items to reconcile profit (loss) to net cash flow from (used in) operating activities that the entity does not separately disclose in the same statement or note. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 20 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_20_b&doctype=Standard -URIDate 2022-03-24 + Details
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