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Other Assets and Liabilities - Summary of Other Assets and Liabilities (Detail) - KRW (₩) ₩ in Millions | Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Other assets |  |  |
Advance payments | ₩ 179,475 |  | ₩ 162,784
Prepaid expenses | 1,935,037 |  | 1,667,372
Contract assets | 557,041 |  | 398,797
Others | 14,243 |  | 4,490
Less: Non-current | (685,488) |  | (545,895)
Current | 2,000,308 |  | 1,687,548
Other liabilities |  |  |
Advances received | 333,344 |  | 518,914
Withholdings | 99,844 |  | 89,403
Unearned revenue | 65,228 |  | 39,528
Lease liabilities | 807,233 | ₩ 807,233 | 163,858
Contract liabilities | 365,610 |  | 347,462
Others | 23,297 |  | 24,909
Less: Non-current | (584,504) |  | (528,160)
Current | ₩ 1,031,958 |  | ₩ 655,914

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