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Financial Assets at Fair Value Through Other Comprehensive Income - Summary of Changes in Financial Assets at Fair Value Through Other Comprehensive Income (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | ₩ 502,829 |  | ₩ 435,107
Acquisition |  | 14,060 |  | 9,451
Disposal |  | (5,332) |  | 0
Valuation |  | (9,970) |  | 61,860
Others |  | 856 |  | (3,589)
Ending Balance |  | 502,443 |  | 502,829
Listed equity securities |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 300,057 |  | 273,826
Acquisition |  | 430 |  | 0
Disposal |  | 0 |  | 0
Valuation |  | (15,433) |  | 28,585
Others |  | 0 |  | (2,354)
Ending Balance |  | 285,054 |  | 300,057
Unlisted equity securities |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 202,243 | [1] | 160,790
Acquisition |  | 9,550 |  | 9,451
Disposal |  | (5,332) |  | 0
Valuation |  | 5,445 |  | 33,237
Others |  | 856 |  | (1,235)
Ending Balance | [1] | 212,762 |  | 202,243
Corporate bond |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 529 |  | 491
Acquisition |  | 4,080 |  | 0
Disposal |  | 0 |  | 0
Valuation |  | 18 |  | 38
Others |  | 0 |  | 0
Ending Balance |  | 4,627 |  | 529
Listed and unlisted equity securties |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 502,300 |  | 434,616
Acquisition |  | 9,980 |  | 9,451
Disposal |  | (5,332) |  | 0
Valuation |  | (9,988) |  | 61,822
Others |  | 856 |  | (3,589)
Ending Balance |  | 497,816 |  | 502,300
Current Financial assets at fair value through other comprehensive income category |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 0 |  | 0
Acquisition |  | 0 |  | 0
Disposal |  | 0 |  | 0
Valuation |  | 0 |  | 0
Others |  | 0 |  | 0
Ending Balance |  | 0 |  | 0
Non-Current Financial assets at fair value through other comprehensive income category |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 502,829 |  | 435,107
Acquisition |  | 14,060 |  | 9,451
Disposal |  | (5,332) |  | 0
Valuation |  | (9,970) |  | 61,860
Others |  | 856 |  | (3,589)
Ending Balance |  | ₩ 502,443 |  | ₩ 502,829
[1] | The Company used initial cost as their fair value because there was not enough information to determine fair value, and the range of the estimated fair value is wide.

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- Definition The amount of financial assets at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 8 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_8_h&doctype=Standard -URIDate 2023-03-23 + Details
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