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Risk Management - Summary of Fair Value Measurement of Financial Assets (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of financial assets [line items] |  |
Financial assets | ₩ 26,197,311 | ₩ 25,175,820
At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 5,542,186 | 4,214,122
Financial assets, at fair value | 5,542,186 | 4,214,122
At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 20,655,125 | 20,961,698
Financial assets, at fair value | 20,655,125 | 20,961,698
Financial assets at fair value through other comprehensive income | At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 674,850 | 502,443
Financial assets, at fair value | 674,850 | 502,443
Derivative assets | Not Designated as Hedging Instrument | At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 1,846,527 | 730,948
Financial assets, at fair value | 1,846,527 | 730,948
Derivative assets | Designated as Hedging Instrument | At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 844,637 | 269,446
Financial assets, at fair value | 844,637 | 269,446
Financial assets at fair value through profit or loss | At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 2,176,172 | 2,711,285
Financial assets, at fair value | 2,176,172 | 2,711,285
Financial assets at amortized cost | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 30,233 | 38,843
Financial assets, at fair value | 30,233 | 38,843
Loans and receivables | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 908,148 | 988,331
Financial assets, at fair value | 908,148 | 988,331
Trade and other receivables | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 15,373,625 | 14,179,322
Financial assets, at fair value | 15,373,625 | 14,179,322
Long-term financial instruments | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 812,211 | 833,737
Financial assets, at fair value | 812,211 | 833,737
Short-term financial instruments | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 1,147,929 | 578,578
Financial assets, at fair value | 1,147,929 | 578,578
Cash and cash equivalents | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 2,382,979 | 4,342,887
Financial assets, at fair value | ₩ 2,382,979 | ₩ 4,342,887

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Classes of financial instruments [domain]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35H&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35M&doctype=Standard -URIDate 2024-03-27 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35N&doctype=Standard -URIDate 2024-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2024-01-01 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35I&doctype=Standard -URIDate 2024-03-27 + Details
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