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Other Assets and Liabilities - Summary of Other Assets and Liabilities (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Other assets |  |
Advance payments | ₩ 164,950 | ₩ 148,299
Prepaid expenses | 241,078 | 255,464
Others | 5,998 | 13,471
Less: Non-current | (107,165) | (106,099)
Current | 304,860 | 311,135
Other liabilities |  |
Advances received | 375,792 | 281,071
Withholdings | 85,142 | 89,679
Unearned revenue | 23,036 | 24,142
Others | 11,629 | 6,160
Less: Non-current | (237,284) | (58,761)
Current | ₩ 258,315 | ₩ 342,291

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