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Fair Value (Tables) | 12 Months Ended
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Dec. 31, 2017
Text block1 [abstract] |
Summary of Carrying Amount and Fair Value of Financial Instruments by Category | Carrying amount and fair value of financial instruments by category as of December 31, 2016 and 2017, are as follows:
|  | 2016 |  | 2017
(In millions of Korean won) |  | Carrying amount |  | Fair value |  | Carrying amount |  | Fair value
Financial assets |  |  |  |  |  |  |  |
Cash and cash equivalents1 |  | ￦2,900,311 |  | ￦— |  | ￦1,928,182 |  | ￦—
Trade and other receivables1 |  | 6,036,363 |  | — |  | 6,643,115 |  | —
Other financial assets |  |  |  |  |  |  |  |
Financial instruments at fair value through profit or loss |  | 6,277 |  | 6,277 |  | 5,813 |  | 5,813
Derivative financial instruments for hedging purpose |  | 227,318 |  | 227,318 |  | 7,389 |  | 7,389
Time deposits and others1 |  | 716,769 |  | — |  | 1,333,317 |  | —
Held-to-maturity |  | 30,143 |  | 30,143 |  | 151 |  | 151
Available-for-sale financial assets2 |  | 299,001 |  | 299,001 |  | 319,402 |  | 319,402
|  | ￦10,216,182 |  | ￦— |  | ￦10,237,369 |  | ￦—
Financial liabilities |  |  |  |  |  |  |  |
Trade and other liabilities1 |  | ￦8,328,082 |  | ￦— |  | ￦8,425,503 |  | ￦—
Borrowings |  | 8,120,791 |  | 8,184,195 |  | 6,683,662 |  | 6,738,326
Other financial liabilities |  |  |  |  |  |  |  |
Financial instruments at fair value through profit or loss |  | 1,973 |  | 1,973 |  | 5,051 |  | 5,051
Derivative financial instruments for hedging purpose |  | 14,928 |  | 14,928 |  | 93,770 |  | 93,770
Other1 |  | 91,763 |  | — |  | 87,670 |  | —
|  | ￦16,557,537 |  | ￦— |  | ￦15,295,656 |  | ￦—
| 1 | The Group did not conduct fair value estimation since the book amount is a reasonable approximation of the fair value.
| 2 | Equity instruments that do not have a quoted price in an active market are measured at cost because their fair value cannot be measured reliably and excluded from the fair value disclosures.
Summary of Available-for-sale Financial Assets Measured at Cost | Available-for-sale financial assets measured at cost as of December 31, 2016 and 2017, are as follows:
(In millions of Korean won) |  | 2016 |  |  | 2017 |
K-Bank |  | ￦ | 36,500 |  |  | ￦ | — |
IBK-AUCTUS Green Growth Private Equity Fund |  |  | 9,506 |  |  |  | 8,518 |
WALDEN No.6 Fund |  |  | 4,710 |  |  |  | 4,670 |
TRANSLINK No.2 Fund |  |  | 9,395 |  |  |  | 9,395 |
Storm IV Fund |  |  | 7,550 |  |  |  | 8,453 |
CBC II Fund |  |  | 8,601 |  |  |  | 7,298 |
Others |  |  | 29,511 |  |  |  | 23,217 |
|  | ￦ | 105,773 |  |  | ￦ | 61,551 |
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 of December 31, 2016 and 2017, are as follows:
|  | 2016 |
(In millions of Korean won) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Recurring fair value measurements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through profit or loss |  | ￦ | — |  |  | ￦ | — |  |  | ￦ | 6,277 |  |  | ￦ | 6,277 |
Derivative financial assets for hedging purpose |  |  | — |  |  |  | 227,318 |  |  |  | — |  |  |  | 227,318 |
Available-for-sale financial assets |  |  | 5,387 |  |  |  | 5,725 |  |  |  | 287,889 |  |  |  | 299,001 |
|  |  | 5,387 |  |  |  | 233,043 |  |  |  | 294,166 |  |  |  | 532,596 |
Disclosed fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Associates and joint ventures |  |  | 3,940 |  |  |  | — |  |  |  | — |  |  |  | 3,940 |
Investment properties1 |  |  | — |  |  |  | — |  |  |  | 1,962,779 |  |  |  | 1,962,779 |
|  |  | 3,940 |  |  |  | — |  |  |  | 1,962,779 |  |  |  | 1,966,719 |
|  | ￦ | 9,327 |  |  | ￦ | 233,043 |  |  | ￦ | 2,256,945 |  |  | ￦ | 2,499,315 |
Recurring fair value measurements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial liabilities at fair value through profit or loss |  | ￦ | — |  |  | ￦ | — |  |  | ￦ | 1,973 |  |  | ￦ | 1,973 |
Derivative financial liabilities for hedging purpose |  |  | — |  |  |  | 14,928 |  |  |  | — |  |  |  | 14,928 |
|  |  | — |  |  |  | 14,928 |  |  |  | 1,973 |  |  |  | 16,901 |
Disclosed fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | — |  |  |  | — |  |  |  | 8,184,195 |  |  |  | 8,184,195 |
|  |  | — |  |  |  | — |  |  |  | 8,184,195 |  |  |  | 8,184,195 |
|  | ￦ | — |  |  | ￦ | 14,928 |  |  | ￦ | 8,186,168 |  |  | ￦ | 8,201,096 |
|  | 2017 |
(In millions of Korean won) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Recurring fair value measurements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets at fair value through profit or loss |  | ￦ | — |  |  | ￦ | — |  |  | ￦ | 5,813 |  |  | ￦ | 5,813 |
Derivative financial assets for hedging purpose |  |  | — |  |  |  | 7,389 |  |  |  | — |  |  |  | 7,389 |
Available-for-sale financial assets |  |  | 6,859 |  |  |  | 5,466 |  |  |  | 307,077 |  |  |  | 319,402 |
|  |  | 6,859 |  |  |  | 12,855 |  |  |  | 312,890 |  |  |  | 332,604 |
Disclosed fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment properties1 |  |  | — |  |  |  | — |  |  |  | 1,755,600 |  |  |  | 1,755,600 |
|  |  | — |  |  |  | — |  |  |  | 1,755,600 |  |  |  | 1,755,600 |
|  | ￦ | 6,859 |  |  | ￦ | 12,855 |  |  | ￦ | 2,068,490 |  |  | ￦ | 2,088,204 |
Recurring fair value measurements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial liabilities at fair value through profit or loss |  | ￦ | — |  |  | ￦ | — |  |  | ￦ | 5,051 |  |  | ￦ | 5,051 |
Derivative financial liabilities for hedging purpose |  |  | — |  |  |  | 76,045 |  |  |  | 17,725 |  |  |  | 93,770 |
|  |  | — |  |  |  | 76,045 |  |  |  | 22,776 |  |  |  | 98,821 |
Disclosed fair value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | — |  |  |  | — |  |  |  | 6,738,326 |  |  |  | 6,738,326 |
|  |  | — |  |  |  | — |  |  |  | 6,738,326 |  |  |  | 6,738,326 |
|  | ￦ | — |  |  | ￦ | 76,045 |  |  | ￦ | 6,761,102 |  |  | ￦ | 6,837,147 |
| 1 | The highest and best use of a non-financial asset does not differ from its current use.
Summary of Changes in Level 3 of Fair Value Hierarchy for Recurring Fair Value Measurements |
| (b) | Details of changes in Level 3 of the fair value hierarchy for the recurring fair value measurements are as follows:
|  | 2016 |
(In millions of Korean won) |  | Financial assets at fair value through profit or loss |  |  | Available-for-sale |  |  | Other derivative financial liabilities |
Beginning balance |  | ￦ | 18 |  |  | ￦ | 267,337 |  |  | ￦ | 2,006 |
Reclassification |  |  | — |  |  |  | 5,723 |  |  |  | — |
Amount recognized in other comprehensive income |  |  | — |  |  |  | 15,099 |  |  |  | — |
Purchases |  |  | 13,461 |  |  |  | 1,561 |  |  |  | — |
Amount recognized in profit or loss |  |  | (7,184 | ) |  |  | (426 | ) |  |  | (33 | )
Sales |  |  | (18 | ) |  |  | (1,405 | ) |  |  | — |
Ending balance |  | ￦ | 6,277 |  |  | ￦ | 287,889 |  |  | ￦ | 1,973 |
|  | 2017 |
(In millions of Korean won) |  | Financial assets at fair value through profit or loss |  |  | Available-for-sale |  |  | Other derivative financial liabilities |  |  | Derivative financial liabilities for hedging purpose |
Beginning balance |  | ￦ | 6,277 |  |  | ￦ | 287,889 |  |  | ￦ | 1,973 |  |  | ￦ | — |
Reclassification |  |  | — |  |  |  | (277 | ) |  |  | — |  |  |  | — |
Amount recognized in other comprehensive income |  |  | — |  |  |  | 58,450 |  |  |  | — |  |  |  | (1,909 | )
Purchases |  |  | — |  |  |  | 85,287 |  |  |  | — |  |  |  | — |
Amount recognized in profit or loss |  |  | (464 | ) |  |  | (113 | ) |  |  | 3,078 |  |  |  | 19,634 |
Sales |  |  | — |  |  |  | (124,159 | ) |  |  | — |  |  |  | — |
Ending balance |  | ￦ | 5,813 |  |  | ￦ | 307,077 |  |  | ￦ | 5,051 |  |  | ￦ | 17,725 |
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 of December 31, 2016 and 2017, are as follows:
|  | 2016 |
(In millions of Korean won) |  | Fair value |  |  | Level |  |  | Valuation techniques |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Recurring fair value measurements |  |  |  |  |  |  |  |  |  |  |  |
Other financial assets |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial assets for hedging purpose |  | ￦ | 227,318 |  |  |  | 2 |  |  |  | Discounted cash flow model |
Available-for-sale financial assets |  |  | 293,614 |  |  |  | 2,3 |  |  |  | Discounted cash flow model |
Others |  |  | 6,277 |  |  |  | 3 |  |  |  | Discounted cash flow model |
Disclosed fair value |  |  |  |  |  |  |  |  |  |  |  |
Investment properties |  |  | 1,962,779 |  |  |  | 3 |  |  |  | Discounted cash flow model |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Recurring fair value measurements |  |  |  |  |  |  |  |  |  |  |  |
Other financial liabilities |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial liabilities for hedging purpose |  |  | 14,928 |  |  |  | 2 |  |  |  | Discounted cash flow model |
Other derivative financial liabilities |  |  | 1,973 |  |  |  | 3 |  |  |  | Discounted cash flow model Comparable Company Analysis |
Disclosed fair value |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 8,184,195 |  |  |  | 3 |  |  |  | Discounted cash flow model |
|  | 2017
(In millions of Korean won) |  | Fair value |  |  | Level |  |  | Valuation techniques
Assets |  |  |  |  |  |  |  |  |  |
Recurring fair value measurements |  |  |  |  |  |  |  |  |  |
Other financial assets |  |  |  |  |  |  |  |  |  |
Derivative financial assets for hedging purpose |  | ￦ | 7,389 |  |  |  | 2 |  |  | Discounted cash flow model
Available-for-sale financial assets |  |  | 312,543 |  |  |  | 2,3 |  |  | Discounted cash flow model
Others |  |  | 5,813 |  |  |  | 3 |  |  | Discounted cash flow model
Disclosed fair value |  |  |  |  |  |  |  |  |  |
Investment properties |  |  | 1,755,600 |  |  |  | 3 |  |  | Discounted cash flow model
Liabilities |  |  |  |  |  |  |  |  |  |
Recurring fair value measurements |  |  |  |  |  |  |  |  |  |
Other financial liabilities |  |  |  |  |  |  |  |  |  |
Derivative financial liabilities for hedging purpose |  |  | 93,770 |  |  |  | 2,3 |  |  | Hull-White Model,
|  |  |  |  |  |  |  |  |  | Discounted cash flow model
Other derivative financial liabilities |  |  | 5,051 |  |  |  | 3 |  |  | Discounted cash flow model Comparable Company Analysis
Disclosed fair value |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 6,738,326 |  |  |  | 3 |  |  | Discounted cash flow 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, 2016 and 2017, are as follows:
(In millions of Korean won) |  | 2016 |  |  | 2017 |
|  | Other derivative financial assets |  |  | Other derivative financial liabilities |  |  | Other derivative financial assets |  |  | Other derivative financial liabilities |
Beginning balance |  | ￦ | 11,293 |  |  | ￦ | — |  |  | ￦ | 8,470 |  |  | ￦ | — |
New transactions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 7,126 |
Disposal |  |  | (2,823 | ) |  |  | — |  |  |  | (2,823 | ) |  |  | (594 | )
Ending balance |  | ￦ | 8,470 |  |  | ￦ | — |  |  | ￦ | 5,647 |  |  | ￦ | 6,532 |

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