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Other Financial Assets - Summary of Other Financial Assets (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Other Financial Assets [Line Items] |  |
Current Other financial assets | ₩ 1,365,603 | ₩ 1,561,445
Non-Current Other financial assets | 1,271,976 | 1,290,820
Loans and receivables |  |
Other Financial Assets [Line Items] |  |
Current Other financial assets | 87,589 | 77,963
Non-Current Other financial assets | 821,482 | 712,199
Loans and receivables | Gross amount |  |
Other Financial Assets [Line Items] |  |
Current Other financial assets | 88,406 | 78,806
Non-Current Other financial assets | 903,397 | 762,555
Loans and receivables | Allowance for doubtful accounts |  |
Other Financial Assets [Line Items] |  |
Current Other financial assets | (10) | (1)
Non-Current Other financial assets | (52,667) | (20,266)
Loans and receivables | Present value discount |  |
Other Financial Assets [Line Items] |  |
Current Other financial assets | (807) | (842)
Non-Current Other financial assets | (29,248) | (30,090)
Short-term financial instruments |  |
Other Financial Assets [Line Items] |  |
Current Other financial assets | 1,278,014 | 1,483,482
Long-term financial instruments |  |
Other Financial Assets [Line Items] |  |
Non-Current Other financial assets | ₩ 450,494 | ₩ 578,621

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