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Cash and Cash Equivalents (Tables)
12 Months Ended
Dec. 31, 2020
Text block [abstract]  
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