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Fair Value (Tables) | 12 Months Ended
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Dec. 31, 2020
Text block [abstract] |
Summary of Carrying Amount and Fair Value of Financial Instruments by Category | Carrying amount and fair value of financial instruments by category as at December 31, 2019 and 2020, are as follows:
|  | December 31, 2019 |  |  | December 31, 2020 |
(In millions of Korean won) |  | Carrying amount |  |  | Fair value |  |  | Carrying amount |  |  | Fair value |
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | ￦ | 2,305,894 |  |  |  | 1 |  |  | ￦ | 2,634,624 |  |  |  | 1 |
Trade and other receivables |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets measured at amortized cost 2 |  |  | 5,748,459 |  |  |  | 1 |  |  |  | 4,976,423 |  |  |  | 1 |
Financial assets at fair value through other comprehensive income |  |  | 1,256,266 |  |  |  | 1,256,266 |  |  |  | 1,118,619 |  |  |  | 1,118,619 |
Other financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets measured at amortized cost |  |  | 441,804 |  |  |  | 1 |  |  |  | 671,068 |  |  |  | 1 |
Financial assets at fair value through profit or loss |  |  | 632,324 |  |  |  | 632,324 |  |  |  | 809,919 |  |  |  | 809,919 |
Financial assets at fair value through other comprehensive income |  |  | 557,342 |  |  |  | 557,342 |  |  |  | 258,516 |  |  |  | 258,516 |
Derivative financial assets for hedging |  |  | 58,576 |  |  |  | 58,576 |  |  |  | 7,684 |  |  |  | 7,684 |
Total |  | ￦ | 11,000,665 |  |  |  |  |  |  | ￦ | 10,476,853 |  |  |  |  |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade and other payables |  | ￦ | 8,679,698 |  |  |  | 1 |  |  | ￦ | 7,017,639 |  |  |  | 1 |
Borrowings |  |  | 7,298,867 |  |  |  | 1 |  |  |  | 7,316,298 |  |  |  | 1 |
Other financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial liabilities at amortized cost |  |  | 129,945 |  |  |  | 1 |  |  |  | 132,558 |  |  |  | 1 |
Financial liabilities at fair value through profit or loss |  |  | 38 |  |  |  | 38 |  |  |  | 2,682 |  |  |  | 2,682 |
Derivative financial liabilities for hedging |  |  | 20,096 |  |  |  | 20,096 |  |  |  | 127,929 |  |  |  | 127,929 |
Total |  | ￦ | 16,128,644 |  |  |  |  |  |  | ￦ | 14,597,106 |  |  |  |  |
| 1 | The Group did not conduct fair value estimation since the book amount is a reasonable approximation of the fair value
| 2 | With the application of IFRS 7, lease receivables are excluded from fair value disclosure.
Summary of Fair Value Hierarchy Classifications of Financial Assets and Financial Liabilities That are Measured at Fair Value | Fair value hierarchy classifications of the financial assets and financial liabilities that are measured at fair value or its fair value is disclosed as at December 31, 2019 and 2020, are as follows:
(In millions of Korean won) |  | December 31, 2019 |
| Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade and other receivables |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through other comprehensive income |  | ￦ | — |  |  | ￦ | 1,256,266 |  |  | ￦ | — |  |  | ￦ | 1,256,266 |
Other financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through profit or loss |  |  | 232 |  |  |  | 136,951 |  |  |  | 495,141 |  |  |  | 632,324 |
Financial assets at fair value through other comprehensive income |  |  | 6,738 |  |  |  | 508,550 |  |  |  | 42,054 |  |  |  | 557,342 |
Derivative financial assets for hedging |  |  | — |  |  |  | 40,788 |  |  |  | 17,788 |  |  |  | 58,576 |
Disclosed fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment properties |  |  | — |  |  |  | — |  |  |  | 2,304,583 |  |  |  | 2,304,583 |
Total |  | ￦ | 6,970 |  |  | ￦ | 1,942,555 |  |  | ￦ | 2,859,566 |  |  | ￦ | 4,809,091 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial liabilities at fair value through profit or loss |  | ￦ | — |  |  | ￦ | 38 |  |  | ￦ | — |  |  | ￦ | 38 |
Derivative financial liabilities for hedging |  |  | — |  |  |  | 20,096 |  |  |  | — |  |  |  | 20,096 |
Total |  | ￦ | — |  |  | ￦ | 20,134 |  |  | ￦ | — |  |  | ￦ | 20,134 |
(In millions of Korean won) |  | December 31, 2020 |
| Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade and other receivables |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through other comprehensive income |  | ￦ | — |  |  | ￦ | 1,118,619 |  |  | ￦ | — |  |  | ￦ | 1,118,619 |
Other financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through profit or loss |  |  | 46,449 |  |  |  | 330,961 |  |  |  | 432,509 |  |  |  | 809,919 |
Financial assets at fair value through other comprehensive income |  |  | 5,606 |  |  |  | 202,121 |  |  |  | 50,789 |  |  |  | 258,516 |
Derivative financial assets for hedging |  |  | — |  |  |  | 7,684 |  |  |  | — |  |  |  | 7,684 |
Disclosed fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment properties |  |  | — |  |  |  | — |  |  |  | 2,645,482 |  |  |  | 2,645,482 |
Total |  | ￦ | 52,055 |  |  | ￦ | 1,659,385 |  |  | ￦ | 3,128,780 |  |  | ￦ | 4,840,220 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial liabilities at fair value through profit or loss |  | ￦ | — |  |  | ￦ | 45 |  |  | ￦ | 2,637 |  |  | ￦ | 2,682 |
Derivative financial liabilities for hedging |  |  | — |  |  |  | 123,735 |  |  |  | 4,194 |  |  |  | 127,929 |
Total |  | ￦ | — |  |  | ￦ | 123,780 |  |  | ￦ | 6,831 |  |  | ￦ | 130,611 |
Summary of Changes in Level 3 of Fair Value Hierarchy for Recurring Fair Value Measurements | Details of changes in Level 3 of the fair value hierarchy for the recurring fair value measurements as at December 31, 2019 and 2020, are as follows:
|  | 2019 |
|  | Financial assets |  |  | Financial liabilities |
(In millions of Korean won) |  | Financial assets at fair value through profit or loss |  |  | Financial assets at fair value through other comprehensive income |  |  | Derivative financial assets (liabilities) for hedging |  |  | Financial liabilities at fair value through profit or loss |
Beginning balance |  | ￦ | 163,600 |  |  | ￦ | 311,536 |  |  | ￦ | (10,183 | ) |  | ￦ | 7,758 |
Purchases |  |  | 584,671 |  |  |  | 6,081 |  |  |  | — |  |  |  | — |
Reclassification |  |  | 225,873 |  |  |  | (444,782 | ) |  |  | — |  |  |  | — |
Disposal |  |  | (485,419 | ) |  |  | (941 | ) |  |  | — |  |  |  | (9,734 | )
Amount recognized in profit or loss 1,2 |  |  | 6,416 |  |  |  | — |  |  |  | 14,462 |  |  |  | 1,976 |
Amount recognized in other comprehensive income 1 |  |  | — |  |  |  | 170,160 |  |  |  | 13,509 |  |  |  | — |
Ending balance |  | ￦ | 495,141 |  |  | ￦ | 42,054 |  |  | ￦ | 17,788 |  |  | ￦ | — |
| 1 | Amount recognized in profit or loss and other comprehensive income with respect to derivative financial liabilities for hedging comprises loss on valuation of derivative instruments.
| 2 | Amount recognized in profit or loss with respect to financial liabilities at fair value through profit or loss comprises loss on valuation of derivative instruments.
|  | 2020 |
|  | Financial assets |  |  | Financial liabilities |
(In millions of Korean won) |  | Financial assets at fair value through profit or loss |  |  | Financial assets at fair value through other comprehensive income |  |  | Financial liabilities at fair value through profit or loss |  |  | Derivative financial assets (liabilities) for hedging |
Beginning balance |  | ￦ | 495,141 |  |  | ￦ | 42,054 |  |  | ￦ | — |  |  | ￦ | (17,788 | )
Purchases |  |  | 374,259 |  |  |  | 13,142 |  |  |  | 2,798 |  |  |  | — |
Reclassification |  |  | 208 |  |  |  | — |  |  |  | — |  |  |  | — |
Disposal |  |  | (451,663 | ) |  |  | (571 | ) |  |  | — |  |  |  | — |
Amount recognized in profit or loss 1,2 |  |  | 14,564 |  |  |  | (428 | ) |  |  | (161 | ) |  |  | 29,345 |
Amount recognized in other comprehensive income 1 |  |  | — |  |  |  | (3,408 | ) |  |  | — |  |  |  | (7,363 | )
Ending balance |  | ￦ | 432,509 |  |  | ￦ | 50,789 |  |  | ￦ | 2,637 |  |  | ￦ | 4,194 |
| 1 | Amount recognized in profit or loss and other comprehensive income with respect to derivative financial liabilities for hedging comprises loss on valuation of derivative instruments.
| 2 | Amount recognized in profit or loss with respect to financial liabilities at fair value through profit or loss comprises loss on valuation of derivative instruments.
Summary of Valuation Techniques and Inputs | Valuation techniques and inputs used in the recurring, non-recurring fair value measurements and disclosed fair values categorized within Level 2 and Level 3 of the fair value hierarchy as at December 31, 2019 and 2020, are as follows:
|  | December 31, 2019
(In millions of Korean won) |  | Fair value |  |  | Level |  |  | Valuation techniques
Assets |  |  |  |  |  |  |  |  |  |
Trade and other receivables |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through other comprehensive income |  | ￦ | 1,256,266 |  |  |  | 2 |  |  | DCF Model
Other financial assets |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through profit or loss |  |  | 632,092 |  |  |  | 2,3 |  |  | DCF Model, Adjusted net asset model
Financial assets at fair value through other comprehensive income |  |  | 550,604 |  |  |  | 2,3 |  |  | DCF Model, Comparable Company Analysis
Derivative financial assets for hedging |  |  | 58,576 |  |  |  | 2,3 |  |  | Hull-White model, DCF Model
Investment properties |  |  | 2,304,583 |  |  |  | 3 |  |  | DCF Model
Liabilities |  |  |  |  |  |  |  |  |  |
Other financial liabilities |  |  |  |  |  |  |  |  |  |
Financial liabilities at fair value through profit or loss |  | ￦ | 38 |  |  |  | 2 |  |  | DCF Model
Derivative financial liabilities for hedging |  |  | 20,096 |  |  |  | 2 |  |  | DCF Model
|  | December 31, 2020
(In millions of Korean won) |  | Fair value |  |  | Level |  |  | Valuation techniques
Assets |  |  |  |  |  |  |  |  |  |
Trade and other receivables |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through other comprehensive income |  | ￦ | 1,118,619 |  |  |  | 2 |  |  | DCF Model
Other financial assets |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through profit or loss |  |  | 763,470 |  |  |  | 2,3 |  |  | DCF Model, Adjusted net asset model
Financial assets at fair value through other comprehensive income |  |  | 252,910 |  |  |  | 2,3 |  |  | DCF Model, Comparable Company Analysis
Derivative financial assets for hedging |  |  | 7,684 |  |  |  | 2 |  |  | DCF Model
Investment properties |  |  | 2,645,482 |  |  |  | 3 |  |  | DCF Model
Liabilities |  |  |  |  |  |  |  |  |  |
Other financial liabilities |  |  |  |  |  |  |  |  |  |
Financial liabilities at fair value through profit or loss |  | ￦ | 2,682 |  |  |  | 2,3 |  |  | DCF Model, Binomial Option Pricing
Derivative financial liabilities for hedging |  |  | 127,929 |  |  |  | 2,3 |  |  | Hull-White model, DCF Model
Summary of Details and Changes of Total Deferred Difference | In relation to this, details and changes of the total deferred difference for the years ended December 31, 2019 and 2020, are as follows:
|  | 2019 |  |  | 2020 |
(In millions of Korean won) |  | Derivatives used for hedging |  |  | Derivative held for trading |  |  | Derivatives used for hedging |  |  | Derivative held for trading |
I. Beginning balance |  | ￦ | 5,107 |  |  | ￦ | (2,824 | ) |  | ￦ | 3,682 |  |  | ￦ | — |
II. New transactions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
III. Recognized at fair value through profit or loss |  |  | (1,425 | ) |  |  | 2,824 |  |  |  | (1,425 | ) |  |  | — |
IV. Ending balance (I+II+III) |  | ￦ | 3,682 |  |  | ￦ | — |  |  | ￦ | 2,257 |  |  | ￦ | — |

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