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Risk Management - Summary of Maturity Analysis for Derivative Financial Assets and Liabilities (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | ₩ (217,018) | ₩ (389,410)
Derivative financial assets, undiscounted cash flows | 2,785,708 | 966,424
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 | (212,123) | (365,846)
Derivative financial assets, undiscounted cash flows | 1,947,516 | 694,937
Gross settlement | Designated as Hedging Instrument |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (4,895) | (23,564)
Derivative financial assets, undiscounted cash flows | 838,192 | 271,487
Less than 1 year |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (46,087) | (22,571)
Derivative financial assets, undiscounted cash flows | 844,543 | 335,842
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 | (46,087) | (22,571)
Derivative financial assets, undiscounted cash flows | 481,359 | 257,073
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 | 363,184 | 78,769
1~2 Years |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (61,259) | (16,246)
Derivative financial assets, undiscounted cash flows | 1,040,644 | 184,163
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 | (61,259) | (11,566)
Derivative financial assets, undiscounted cash flows | 685,807 | 123,132
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 | 0 | (4,680)
Derivative financial assets, undiscounted cash flows | 354,837 | 61,031
2~5 Years |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (73,017) | (214,833)
Derivative financial assets, undiscounted cash flows | 802,984 | 300,691
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 | (73,017) | (201,590)
Derivative financial assets, undiscounted cash flows | 689,026 | 169,004
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 | 0 | (13,243)
Derivative financial assets, undiscounted cash flows | 113,958 | 131,687
More than 5 years |  |
Disclosure of maturity analysis for derivative financial liabilities [line items] |  |
Derivative financial liabilities, undiscounted cash flows | (36,655) | (135,760)
Derivative financial assets, undiscounted cash flows | 97,537 | 145,728
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 | (31,760) | (130,119)
Derivative financial assets, undiscounted cash flows | 91,324 | 145,728
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 | (4,895) | (5,641)
Derivative financial assets, undiscounted cash flows | ₩ 6,213 | ₩ 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 2024-01-01 -Paragraph 39 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_39_b&doctype=Standard -URIDate 2024-03-27 + Details
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