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Retained Earnings and Dividends Paid - Summary of Changes in Retained Earnings (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Beginning balance | ₩ 16,338,262 |  |
Profit (loss) for the year attributed to owners of the controlling company | 3,491,698 | ₩ (4,822,549) | ₩ (24,466,853)
Changes in equity method retained earnings |  |  |
Changes | (755,452) | (595,056) |
Remeasurements of defined benefit liability, net of tax | (296,135) | (271,724) | 663,095
Ending balance | 20,128,247 | 16,338,262 |
Retained earnings [member] |  |  |
Beginning balance | 16,338,262 | 21,431,300 |
Profit (loss) for the year attributed to owners of the controlling company | 3,491,698 | (4,822,549) |
Changes in equity method retained earnings |  |  |
Beginning balance | (11,074) | 16,275 |
Changes | (6,346) | (27,349) |
Ending balance | (17,420) | (11,074) | 16,275
Remeasurements of defined benefit liability, net of tax | (281,761) | (242,987) | 626,769
Transfer of revaluation reserve | 586,394 | 0 |
Others | 0 | (153) |
Ending balance | ₩ 20,128,247 | ₩ 16,338,262 | ₩ 21,431,300

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- Definition The increase (decrease) in equity resulting from transfers between a revaluation surplus and retained earnings. [Refer: Retained earnings; Revaluation surplus] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d&doctype=Standard -URIDate 2024-03-27 + Details
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