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Risk Management - Summary of Fair Value Measurement of Assets (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | ₩ 502,443 | ₩ 502,829 | ₩ 435,107
At fair value |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | 502,443 | 502,829 |
Derivative assets | 1,000,394 | 1,018,024 |
Financial assets at fair value through profit or loss | 2,711,285 | 3,709,508 |
Total | 4,214,122 | 5,230,361 |
At fair value | Level 1 |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | 285,054 | 300,057 |
Derivative assets | 0 | 0 |
Financial assets at fair value through profit or loss | 0 | 0 |
Total | 285,054 | 300,057 |
At fair value | Level 2 |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | 0 | 0 |
Derivative assets | 1,000,394 | 1,018,024 |
Financial assets at fair value through profit or loss | 2,704,550 | 3,703,179 |
Total | 3,704,944 | 4,721,203 |
At fair value | Level 3 |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | 217,389 | 202,772 |
Derivative assets | 0 | 0 |
Financial assets at fair value through profit or loss | 6,735 | 6,329 |
Total | ₩ 224,124 | ₩ 209,101 |

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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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- Definition The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 8 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_8_a&doctype=Standard -URIDate 2023-03-23 + Details
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