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Accumulated Other Comprehensive Income and Other Components of Equity (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Accumulated Other Comprehensive Income | As of December 31, 2016 and 2017, the details of the Controlling Company’s accumulated other comprehensive income are as follows:
(in millions of Korean won) |  | 2016 |  |  | 2017 |
Changes in investments in associates and joint ventures |  | ￦ | (10,883 | ) |  | ￦ | (735 | )
Loss on derivatives valuation |  |  | (34,309 | ) |  |  | (3,463 | )
Gain of valuation on available-for-sale |  |  | 54,106 |  |  |  | 52,673 |
Foreign currency translation adjustment |  |  | (10,346 | ) |  |  | (17,490 | )
Total |  | ￦ | (1,432 | ) |  | ￦ | 30,985 |
Summary of Changes in Accumulated Other Comprehensive Income | Changes in accumulated other comprehensive income for the years ended December 31, 2016 and 2017, are as follows:
|  | 2016 |
(in millions of Korean won) |  | Beginning |  |  | Increase /decrease |  |  | Reclassified to gain or loss |  |  | Ending |
Changes in investments in associates and joint ventures |  | ￦ | (10,312 | ) |  | ￦ | (571 | ) |  | ￦ | — |  |  | ￦ | (10,883 | )
Gain or loss on derivatives valuation |  |  | (23,234 | ) |  |  | 64,796 |  |  |  | (75,871 | ) |  |  | (34,309 | )
Gain or loss of valuation on available-for-sale |  |  | 52,415 |  |  |  | 5,204 |  |  |  | (3,513 | ) |  |  | 54,106 |
Foreign currency translation adjustment |  |  | (4,999 | ) |  |  | (5,347 | ) |  |  | — |  |  |  | (10,346 | )
Total |  | ￦ | 13,870 |  |  | ￦ | 64,082 |  |  | ￦ | (79,384 | ) |  | ￦ | (1,432 | )
|  | 2017 |
(in millions of Korean won) |  | Beginning |  |  | Increase /decrease |  |  | Reclassified to gain or loss |  |  | Ending |
Changes in investments in associates and joint ventures |  | ￦ | (10,883 | ) |  | ￦ | 10,148 |  |  | ￦ | — |  |  | ￦ | (735 | )
Gain or loss on derivatives valuation |  |  | (34,309 | ) |  |  | (111,083 | ) |  |  | 141,929 |  |  |  | (3,463 | )
Gain or loss of valuation on available-for-sale |  |  | 54,106 |  |  |  | 54,017 |  |  |  | (55,450 | ) |  |  | 52,673 |
Foreign currency translation adjustment |  |  | (10,346 | ) |  |  | (7,144 | ) |  |  | — |  |  |  | (17,490 | )
Total |  | ￦ | (1,432 | ) |  | ￦ | (54,062 | ) |  | ￦ | 86,479 |  |  | ￦ | 30,985 |
Summary of Other Components of Equity | As of December 31, 2016 and 2017, the other components of equity are as follows:
(in millions of Korean won) |  | 2016 |  |  | 2017 |
Treasury stock1 |  | ￦ | (859,789 | ) |  | ￦ | (853,108 | )
Loss on disposal of treasury stock2 |  |  | 607 |  |  |  | 873 |
Share-based payments |  |  | 5,762 |  |  |  | 6,483 |
Others3 |  |  | (364,514 | ) |  |  | (359,550 | )
Total |  | ￦ | (1,217,934 | ) |  | ￦ | (1,205,302 | )
| 1 | During the year ended December 31, 2017, the Group granted 125,412 treasury shares as share-based payment.
| 2 | The amount directly reflected in equity is ￦653 million (2016: ￦738 million) as of December 31, 2017.
| 3 | Profit or loss incurred from transactions with non-controlling interest and investment difference incurred from change in proportion of subsidiaries are included.
Summary of Treasury Stock | As of December 31, 2016 and 2017, the details of treasury stock are as follows:
|  | 2016 |  |  | 2017 |
Number of shares |  |  | 16,140,165 |  |  |  | 16,014,753 |
Amounts (In millions of Korean won) |  | ￦ | 859,789 |  |  | ￦ | 853,108 |

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