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Risk Management - Summary of Fair Value Measurement of Financial Assets (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of financial assets [line items] |  |
Financial assets | ₩ 25,175,820 | ₩ 23,473,492
At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 4,214,122 | 5,230,361
Financial assets, at fair value | 4,214,122 | 5,230,361
At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 20,961,698 | 18,243,131
Financial assets, at fair value | 20,961,698 | 18,243,131
Financial assets at fair value through other comprehensive income | At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 502,443 | 502,829
Financial assets, at fair value | 502,443 | 502,829
Derivative assets | Not Designated as Hedging Instrument | At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 730,948 | 693,072
Financial assets, at fair value | 730,948 | 693,072
Derivative assets | Designated as Hedging Instrument | At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 269,446 | 324,952
Financial assets, at fair value | 269,446 | 324,952
Financial assets at fair value through profit or loss | At fair value |  |
Disclosure of financial assets [line items] |  |
Financial assets | 2,711,285 | 3,709,508
Financial assets, at fair value | 2,711,285 | 3,709,508
Financial assets at amortized cost | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 38,843 | 26,998
Financial assets, at fair value | 38,843 | 26,998
Loans and receivables | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 988,331 | 1,013,371
Financial assets, at fair value | 988,331 | 1,013,371
Trade receivables | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 14,179,322 | 12,614,902
Financial assets, at fair value | 14,179,322 | 12,614,902
Long-term financial instruments | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 833,737 | 686,322
Financial assets, at fair value | 833,737 | 686,322
Short-term financial instruments | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 578,578 | 666,758
Financial assets, at fair value | 578,578 | 666,758
Cash and cash equivalents | At amortized cost |  |
Disclosure of financial assets [line items] |  |
Financial assets | 4,342,887 | 3,234,780
Financial assets, at fair value | ₩ 4,342,887 | ₩ 3,234,780

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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: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35H&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35M&doctype=Standard -URIDate 2023-03-23 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35N&doctype=Standard -URIDate 2023-03-23 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35I&doctype=Standard -URIDate 2023-03-23 + Details
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