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Risk Management - Summary of Fair Value Measurement of Assets (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | ₩ 435,107 | ₩ 358,559 | [1]
Derivative assets | 661,447 | 172,910 |
Financial assets at fair value through profit or loss | 1,032,864 | 1,881,382 |
At fair value |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | 435,107 | 358,559 |
Derivative assets | 647,783 | 166,413 |
Financial assets at fair value through profit or loss | 1,032,864 | 1,881,382 |
Total | 2,115,754 | 2,406,354 |
At fair value | Level 1 |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | 273,826 | 194,670 |
Derivative assets | 0 | 0 |
Financial assets at fair value through profit or loss | 0 | 0 |
Total | 273,826 | 194,670 |
At fair value | Level 2 |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | 0 | 0 |
Derivative assets | 647,783 | 166,413 |
Financial assets at fair value through profit or loss | 1,027,067 | 1,875,690 |
Total | 1,674,850 | 2,042,103 |
At fair value | Level 3 |  |  |
Disclosure of fair value measurement of assets [line items] |  |  |
Financial assets at fair value through other comprehensive income | 161,281 | 163,889 |
Derivative assets | 0 | 0 |
Financial assets at fair value through profit or loss | 5,797 | 5,692 |
Total | ₩ 167,078 | ₩ 169,581 |
[1] | The Company used initial cost as their fair value because there was not enough information to determine fair value, and the range of the estimated fair value is wide.

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- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of financial assets at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 8 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_8_h&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_8_a&doctype=Standard -URIDate 2021-03-24 + Details
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