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Operating Revenues (Tables) | 12 Months Ended
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Dec. 31, 2017
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Summary of Operating Revenues | Operating revenues for the years ended December 31, 2015, 2016 and 2017, are as follows:
(In millions of Korean won) |  | 2015 |  |  | 2016 |  |  | 2017 |
Services provided |  | ￦ | 19,455,693 |  |  | ￦ | 19,935,865 |  |  | ￦ | 19,898,725 |
Sale of goods |  |  | 2,755,980 |  |  |  | 2,819,141 |  |  |  | 3,360,816 |
Others |  |  | 488,183 |  |  |  | 365,872 |  |  |  | 287,388 |
Total |  | ￦ | 22,699,856 |  |  | ￦ | 23,120,878 |  |  | ￦ | 23,546,929 |

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