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Sales
 12 Months Ended
Dec. 31, 2018
Revenue [Abstract]  
Sales
38.

Sales

 

  Details

of sales for the years ended December 31, 2016, 2017 and 2018 are as follows:

 

          2016     2017     2018  
          Domestic     Overseas     Domestic     Overseas     Domestic     Overseas  
          In millions of won  

[Type of goods and services]

              

Sales of goods

   ￦       54,982,095       397,392       55,373,316       399,232       57,514,866       382,938  

Electricity

       54,304,529       —         54,649,882       —         56,842,011       —    

Heat supply

       181,597       —         205,838       —         216,117       —    

Others

       495,969       397,392       517,596       399,232       456,738       382,938  

Sales of service

       195,697       161,046       186,990       164,167       176,539       216,328  

Sales of construction services

       132,219       3,894,638       92,501       3,119,683       108,586       1,633,805  
   

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  
  ￦       55,310,011       4,453,076       55,652,807       3,683,082       57,799,991       2,233,071  
   

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  

[Timing of revenue recognition]

 

Performance obligations satisfied at a point in time

   ￦       54,982,095       397,392       55,373,316       399,232       57,514,866       382,938  

Performance obligations satisfied over time

       327,916       4,055,684       279,491       3,283,850       285,125       1,850,133  
   

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

 

  
  ￦       55,310,011       4,453,076       55,652,807       3,683,082       57,799,991       2,233,071