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Segment Information - Summary of Segment Information (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of operating segments [line items] |  |  |
Revenue | ₩ 413,938 | ₩ 405,953 | ₩ 360,967
Depreciation Amortization | 6,318 | 4,920 | 3,653
Operating profit | 96,719 | 88,368 | 48,663
Operating Segments |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 460,468 | 466,608 | 414,412
Depreciation Amortization | 6,318 | 4,920 | 3,653
Operating profit | 97,205 | 88,118 | 46,971
Operating Segments | Online |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 90,123 | 107,949 | 48,182
Depreciation Amortization | 1,975 | 1,609 | 1,401
Operating profit | 31,266 | 45,115 | 7,754
Operating Segments | Mobile |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 346,928 | 336,326 | 346,878
Depreciation Amortization | 1,875 | 1,823 | 1,145
Operating profit | 65,179 | 42,493 | 38,655
Operating Segments | Other |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | 23,417 | 22,333 | 19,352
Depreciation Amortization | 2,468 | 1,488 | 1,107
Operating profit | 760 | 510 | 562
Inter- Segment Eliminations |  |  |
Disclosure of operating segments [line items] |  |  |
Revenue | (46,530) | (60,655) | (53,445)
Depreciation Amortization | 0 | 0 | 0
Operating profit | ₩ (486) | ₩ 250 | ₩ 1,692

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