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Other-Financial Assets (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Other Financial Assets [Line Items] |  |  |
Current Other financial assets |  | ₩ 1,991,939 | ₩ 1,945,417
Non-Current Other financial assets |  | 1,044,762 | 1,316,250
Loans and receivables |  |  |
Other Financial Assets [Line Items] |  |  |
Current Other financial assets |  | 122,653 | 243,333
Non-Current Other financial assets |  | 596,021 | 662,308
Loans and receivables | Gross amount |  |  |
Other Financial Assets [Line Items] |  |  |
Current Other financial assets |  | 123,657 | 244,309
Non-Current Other financial assets |  | 639,673 | 711,069
Loans and receivables | Allowance for doubtful accounts |  |  |
Other Financial Assets [Line Items] |  |  |
Current Other financial assets |  | (12) | 0
Non-Current Other financial assets |  | (4,940) | (8,948)
Loans and receivables | Present value discount |  |  |
Other Financial Assets [Line Items] |  |  |
Current Other financial assets |  | (992) | (976)
Non-Current Other financial assets |  | (38,712) | (39,813)
Short-term financial instruments |  |  |
Other Financial Assets [Line Items] |  |  |
Current Other financial assets | [1] | 1,869,286 | 1,702,084
Long-term financial instruments |  |  |
Other Financial Assets [Line Items] |  |  |
Non-Current Other financial assets | [1] | 448,741 | 542,430
Financial assets at fair value through profit or loss |  |  |
Other Financial Assets [Line Items] |  |  |
Current Other financial assets | [1] | 0 | 0
Non-Current Other financial assets | [1] | ₩ 0 | ₩ 111,512
[1] | Certain financial assets at fair value previously recognized as other financial assets is reclassified to financial assets at fair value through profit or loss upon the adoption of IFRS 9 'Financial Instruments'.

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