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Risk Management - Summary of Maturity Analysis for Derivative Financial Assets and Liabilities (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | ₩ (389,410) | ₩ (339,447)
Derivative financial assets, undiscounted cash flows | 966,424 | 1,048,713
Net settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | 0 | 0
Derivative financial assets, undiscounted cash flows | 0 | 0
Gross settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (365,846) | (313,942)
Derivative financial assets, undiscounted cash flows | 694,937 | 735,563
Gross settlement | Designated as Hedging Instrument |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (23,564) | (25,505)
Derivative financial assets, undiscounted cash flows | 271,487 | 313,150
Less than 1 year |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (22,571) | (42,663)
Derivative financial assets, undiscounted cash flows | 335,842 | 996,011
Less than 1 year | Net settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | 0 | 0
Derivative financial assets, undiscounted cash flows | 0 | 0
Less than 1 year | Gross settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (22,571) | (42,663)
Derivative financial assets, undiscounted cash flows | 257,073 | 861,621
Less than 1 year | Gross settlement | Designated as Hedging Instrument |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | 0 | 0
Derivative financial assets, undiscounted cash flows | 78,769 | 134,390
1~2 Years |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (16,246) | (25,289)
Derivative financial assets, undiscounted cash flows | 184,163 | 208,440
1~2 Years | Net settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | 0 | 0
Derivative financial assets, undiscounted cash flows | 0 | 0
1~2 Years | Gross settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (11,566) | (15,225)
Derivative financial assets, undiscounted cash flows | 123,132 | 160,938
1~2 Years | Gross settlement | Designated as Hedging Instrument |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (4,680) | (10,064)
Derivative financial assets, undiscounted cash flows | 61,031 | 47,502
2~5 Years |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (214,833) | (176,306)
Derivative financial assets, undiscounted cash flows | 300,691 | (221,399)
2~5 Years | Net settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | 0 | 0
Derivative financial assets, undiscounted cash flows | 0 | 0
2~5 Years | Gross settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (201,590) | (171,130)
Derivative financial assets, undiscounted cash flows | 169,004 | (352,657)
2~5 Years | Gross settlement | Designated as Hedging Instrument |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (13,243) | (5,176)
Derivative financial assets, undiscounted cash flows | 131,687 | 131,258
More than 5 years |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (135,760) | (95,189)
Derivative financial assets, undiscounted cash flows | 145,728 | 65,661
More than 5 years | Net settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | 0 | 0
Derivative financial assets, undiscounted cash flows | 0 | 0
More than 5 years | Gross settlement | Not Designated as Hedging Instrument Trading |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (130,119) | (84,924)
Derivative financial assets, undiscounted cash flows | 145,728 | 65,661
More than 5 years | Gross settlement | Designated as Hedging Instrument |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (5,641) | (10,265)
Derivative financial assets, undiscounted cash flows | ₩ 0 | ₩ 0

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- Definition The amount of contractual undiscounted cash flows in relation to derivative financial liabilities. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 39 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_39_b&doctype=Standard -URIDate 2023-03-23 + Details
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