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Non-financial Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Other Liabilities Disclosure [Abstract] |
Non-financial Liabilities | Non-financial liabilities as of December 31, 2017 and 2018 are as follows:
|  |  |  |  | 2017 |  |  | 2018 |
|  |  |  |  | Current |  |  | Non-current |  |  | Current |  |  | Non-current |
|  |  |  |  | In millions of won |
Advance received |  | ￦ |  |  |  |  | 3,772,713 |  |  |  | 181,612 |  |  |  | 3,724,238 |  |  |  | 80,937 |
Unearned revenue |  |  |  |  |  |  | 41,593 |  |  |  | 19,718 |  |  |  | 63,038 |  |  |  | 4,690 |
Deferred revenue |  |  |  |  |  |  | 476,631 |  |  |  | 7,848,550 |  |  |  | 556,072 |  |  |  | 8,050,491 |
Withholdings |  |  |  |  |  |  | 164,370 |  |  |  | 10,529 |  |  |  | 172,454 |  |  |  | 10,856 |
Others |  |  |  |  |  |  | 1,129,001 |  |  |  | 12,025 |  |  |  | 1,058,239 |  |  |  | 13,059 |
|  | ￦ |  |  |  |  | 5,584,308 |  |  |  | 8,072,434 |  |  |  | 5,574,041 |  |  |  | 8,160,033 |

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