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Classification of Financial Instruments - Classification of Comprehensive Income (Loss) from Financial Instruments (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income, expense, gains or losses of financial instruments |  |  |
Dividends income | ₩ 28,875 | ₩ 10,522 | ₩ 7,316
Gain (loss) on valuation of derivatives | 224,218 | 822,994 | (455,715)
Gain (loss) on valuation of financial assets | 32,661 | 34,444 |
Interest expense of trade and other payables | 204,078 | 213,765 | 88,757
Interest expense of others | 472,248 | 384,423 | 540,867
Other finance income | 925 | 1,284 | 1,470
Other finance expenses | 25,144 | 4,058 | 4,456
Cash and cash equivalents |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Interest income | 51,872 | 12,692 | 9,419
Gain (loss) on foreign currency transactions and translations | 22,158 | 34,923 | (15,911)
Financial assets at fair value through profit or loss |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Interest income | 58,540 | 18,415 | 19,114
Dividends income | 1,994 | 2,949 | 4,734
Gain (loss) on valuation of derivatives | 336,049 | 450,896 | (52,447)
Gain (loss) on transaction of derivatives | 205,298 | 54,352 | 36,563
Gain (loss) on valuation of financial assets | (37,230) | 8,858 | 5,508
Gain on disposal of financial assets | 9,358 | 4,221 | 11,344
Financial assets at fair value through other comprehensive income |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Dividends income | 26,881 | 7,573 | 2,582
Financial assets at amortized cost |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Interest income | 1,308 | 797 | 612
Gain (loss) on foreign currency transactions and translations | 5,087 | (3,647) | (1,733)
Loans and receivables |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Interest income | 33,545 | 25,196 | 26,232
Gain (loss) on foreign currency transactions and translations | 596 | 729 | (527)
Trade and other receivables |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Interest income | 164,653 | 144,543 | 151,035
Gain on disposal of financial assets | 0 | 2,452 | 0
Gain (loss) on foreign currency transactions and translations | 1,019 | 14,207 | 23,458
Short-term financial instruments |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Interest income | 15,827 | 7,531 | 25,540
Gain (loss) on foreign currency transactions and translations | 3,513 | 32,218 | (38,088)
Long-term financial instruments |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Interest income | 14,371 | 12,470 | 10,406
Gain (loss) on foreign currency transactions and translations | 1 | 27 | 0
Other financial assets |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Interest income | 637 | 230 | 228
Derivative (applying hedge accounting) |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Gain (loss) on valuation of derivatives | 149,888 | 211,180 | (77,733)
Gain (loss) on transaction of derivatives | 54,422 | 31,351 | 36,053
Gain (loss) on valuation of derivatives (equity, before tax) | (93,699) | (11,734) | 9,925
Financial liabilities at fair value through profit or loss |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Gain (loss) on valuation of derivatives | (345,313) | 2,751 | (104,607)
Gain (loss) on transaction of derivatives | (110,236) | (15,358) | (49,788)
Financial liabilities carried at amortized cost |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Gain (loss) on repayment of financial liabilities | (15) | (10) | (35)
Gain (loss) on foreign currency transactions and translations | (936,269) | (1,162,835) | 772,045
Interest expense of borrowings and debt securities | 2,142,220 | 1,316,269 | 1,365,801
Interest expense of trade and other payables | 204,078 | 213,765 | 88,757
Interest expense of others | 472,248 | 384,423 | 540,867
Other finance income | 927 | 1,284 | 0
Other finance expenses | 167 | 2,504 | 0
Derivatives (applying hedge accounting) |  |  |
Income, expense, gains or losses of financial instruments |  |  |
Gain (loss) on valuation of derivatives | 83,594 | 158,167 | (220,928)
Gain (loss) on transaction of derivatives | 75,201 | 13,737 | 42,565
Gain (loss) on valuation of derivatives (equity, before tax) | ₩ 28,647 | ₩ (28,726) | ₩ 101,295

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- Definition The gain (loss) arising from the difference between the carrying amount of the financial liability extinguished and the measurement of the consideration paid (equity instruments issued) to the creditor. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRIC -Number 19 -IssueDate 2022-03-24 -Paragraph 11 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRIC&num=19&code=ifrs-tx-2022-en-r&anchor=para_11&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_85&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2022-03-24 -Paragraph 52 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2022-en-r&anchor=para_52_a&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 35 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_35&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 20 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_20_a_i&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of interest expense on other financial liabilities. [Refer: Interest expense; Other financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of income arising from interest for financial assets that are not at fair value through profit or loss. [Refer: Interest income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 20 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_20_b&doctype=Standard&book=b -URIDate 2022-03-24 + Details
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- Definition The amount of other comprehensive income, before tax, related to gains (losses) on hedging instruments that hedge investments in equity instruments that the entity has designated at fair value through other comprehensive income. [Refer: Other comprehensive income, before tax] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 91 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_91_b&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of finance costs that the entity does not separately disclose in the same statement or note. [Refer: Finance costs] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of finance income that the entity does not separately disclose in the same statement or note. [Refer: Finance income] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of dividends recognised as income. Dividends are distributions of profits to holders of equity investments in proportion to their holdings of a particular class of capital. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of trading income (expense) relating to derivative financial instruments. [Refer: Derivatives [member]; Trading income (expense)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of trading income (expense) relating to equity instruments. [Refer: Equity instruments held; Trading income (expense)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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