XML 136 R121.htm IDEA: XBRL DOCUMENT v3.8.0.1
Restricted Deposits (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Restricted Cash and Cash Equivalents, Current [Abstract]    
Escrow accounts ₩ 53 ₩ 91
Deposits for government project 15,365 16,457
Collateral provided for borrowings 79,569 80,327
Collateral provided for lawsuit 2 241
Deposits for transmission regional support program 2,320 2,137
Non-current available-for-sale financial asset [Abstract]    
Decommissioning costs of nuclear power plants 214,156 437,015
Short-term financial instruments [Abstract]    
Bidding guarantees 119 118
Restriction on withdrawal related to 'win-win growth program' for small and medium enterprises 34,000 33,000
Other current receivables [Abstract]    
Deposit for lawsuit   16,000
Financial assets at fair value through profit or loss [Abstract]    
Decommissioning costs of nuclear power plants 108,512  
Long-term financial instruments [Abstract]    
Guarantee deposits for checking account 2 2
Guarantee deposits for banking accounts at oversea branches 302 342
Decommissioning costs of nuclear power plants 337,234 214,121
Funds for developing small and medium enterprises [1] 200,000 200,000
Total Restricted Deposits ₩ 991,634 ₩ 999,851
[1] Deposits for small and medium enterprise at IBK and others for construction of Bitgaram Energy Valley and support for the high potential businesses as of December 31, 2017 and 2016.