XML 235 R220.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair value measurement of liabilities (Details) - At fair value [Member] - KRW (₩)
₩ in Millions
Dec. 31, 2017
Dec. 31, 2016
Disclosure of fair value measurement of liabilities [Line Items]    
Derivative liabilities ₩ 428,059 ₩ 138,686
Level 2 [Member]    
Disclosure of fair value measurement of liabilities [Line Items]    
Derivative liabilities ₩ 428,059 ₩ 138,686