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Fair Value - Summary of Valuation Techniques and Inputs (Detail) - KRW (₩) ₩ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Assets |  |  |
Financial assets at fair value through other comprehensive income | ₩ 258,516 | ₩ 557,342 |
Other financial assets |  |  |
Financial assets at fair value through profit or loss | 809,919 | 632,324 |
Derivative financial assets for hedging | 7,684 | 58,576 |
Investment properties | 1,368,453 | 1,387,430 | ₩ 1,091,084
Other financial liabilities |  |  |
Financial liabilities at fair value through profit or loss | 2,682 | 38 |
Derivative financial liabilities for hedging | 127,929 | 20,096 |
Level 2 [Member] |  |  |
Other financial assets |  |  |
Derivative financial assets for hedging | ₩ 7,684 | ₩ 58,576 |
Other financial liabilities |  |  |
Valuation techniques | DCF Model |  |
Valuation techniques |  | DCF Model |
Level 2 [Member] | Financial assets at fair value through profit or loss [member] |  |  |
Other financial liabilities |  |  |
Valuation techniques |  | DCF Model |
Level 2 [Member] | Financial assets at fair value through other comprehensive income [member] |  |  |
Other financial liabilities |  |  |
Valuation techniques | DCF Model | DCF Model |
Level 2 [Member] | Financial assets at fair value through other comprehensive income [member] | Trades and other receivables [member] |  |  |
Assets |  |  |
Financial assets at fair value through other comprehensive income | ₩ 1,118,619 | ₩ 1,256,266 |
Level 2, 3 [Member] |  |  |
Other financial liabilities |  |  |
Derivative financial liabilities for hedging | ₩ 127,929 | 20,096 |
Valuation techniques | Hull-White model, DCF Model |  |
Level 2, 3 [Member] | Financial assets at fair value through profit or loss [member] |  |  |
Other financial assets |  |  |
Financial assets at fair value through profit or loss | ₩ 763,470 | ₩ 632,092 |
Other financial liabilities |  |  |
Valuation techniques | DCF Model, Adjusted net asset model | DCF Model, Adjusted net asset model |
Valuation techniques | DCF Model, Binomial Option Pricing |  |
Level 2, 3 [Member] | Financial assets at fair value through other comprehensive income [member] |  |  |
Assets |  |  |
Financial assets at fair value through other comprehensive income | ₩ 252,910 | ₩ 550,604 |
Other financial liabilities |  |  |
Valuation techniques | DCF Model, Comparable Company Analysis | DCF Model, Comparable Company Analysis |
Level 3 [Member] |  |  |
Other financial assets |  |  |
Investment properties | ₩ 2,645,482 | ₩ 2,304,583 |
Other financial liabilities |  |  |
Valuation techniques | DCF Model | DCF Model |
Level 3 [Member] | Financial assets at fair value through profit or loss [member] |  |  |
Other financial liabilities |  |  |
Financial liabilities at fair value through profit or loss | ₩ 2,682 | ₩ 38 |

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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 2020-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of financial liabilities that meet either of the following conditions: (a) they meet the definition of held for trading; or (b) upon initial recognition they are designated by the entity as at fair value through profit or loss. An entity may use this designation only when permitted by paragraph 4.3.5 of IFRS 9 (embedded derivatives) or when doing so results in more relevant information, because either: (a) it eliminates or significantly reduces a measurement or recognition inconsistency (sometimes referred to as ‘an accounting mismatch’) that would otherwise arise from measuring assets or liabilities or recognising the gains and losses on them on different bases; or (b) a group of financial liabilities or financial assets and financial liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided internally on that basis to the entity’s key management personnel (as defined in IAS 24). [Refer: At fair value [member]; Key management personnel of entity or parent [member]; Derivatives [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_e&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of property (land or a building - or part of a building - or both) held (by the owner or by the lessee as a right-of-use asset) to earn rentals or for capital appreciation or both, rather than for: (a) use in the production or supply of goods or services or for administrative purposes; or (b) sale in the ordinary course of business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2020-01-01 -Paragraph 76 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2020-en-r&anchor=para_76&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2020-01-01 -Paragraph 79 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2020-en-r&anchor=para_79_d&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_b&doctype=Standard -URIDate 2020-01-01 + Details
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