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Cash and Cash Equivalents (Tables) | 12 Months Ended
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Dec. 31, 2020
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Summary of Restricted Cash and Cash Equivalents | Restricted cash and cash equivalents as at December 31, 2019 and 2020, are as follows:
(In millions of Korean won) |  | December 31, 2019 |  | December 31, 2020 |  | Description
Bank deposits |  | ￦ 21,290 |  | ￦ 28,414 |  | Deposit restricted for government project and others

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