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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, 2022 | Dec. 31, 2021
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | ₩ 435,107 |  | ₩ 358,559
Acquisition |  | 9,451 |  | 10,929
Disposal |  | 0 |  | (8,221)
Valuation |  | 61,860 |  | 68,777
Others |  | (3,589) |  | 5,063
Ending Balance |  | 502,829 |  | 435,107
Listed equity securities |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 273,826 |  | 194,669
Acquisition |  | 0 |  | 1,500
Disposal |  | 0 |  | (8,208)
Valuation |  | 28,585 |  | 81,112
Others |  | (2,354) |  | 4,753
Ending Balance |  | 300,057 |  | 273,826
Unlisted equity securities |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 160,790 | [1] | 163,890
Acquisition |  | 9,451 |  | 8,929
Disposal |  | 0 |  | (13)
Valuation |  | 33,237 |  | (12,335)
Others |  | (1,235) |  | 319
Ending Balance | [1] | 202,243 |  | 160,790
Corporate bond |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 491 |  | 0
Acquisition |  | 0 |  | 500
Disposal |  | 0 |  | 0
Valuation |  | 38 |  | 0
Others |  | 0 |  | (9)
Ending Balance |  | 529 |  | 491
Listed and unlisted equity securties |  |  |  |
Changes in financial assets at fair value through other comprehensive income [Line Items] |  |  |  |
Beginning balance |  | 434,616 |  | 358,559
Acquisition |  | 9,451 |  | 10,429
Disposal |  | 0 |  | (8,221)
Valuation |  | 61,822 |  | 68,777
Others |  | (3,589) |  | 5,072
Ending Balance |  | 502,300 |  | 434,616
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 |  | 435,107 |  | 358,559
Acquisition |  | 9,451 |  | 10,929
Disposal |  | 0 |  | (8,221)
Valuation |  | 61,860 |  | 68,777
Others |  | (3,589) |  | 5,063
Ending Balance |  | ₩ 502,829 |  | ₩ 435,107
[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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