XML 88 R99.htm IDEA: XBRL DOCUMENT v3.20.1
Other Financial Assets and Liabilities - Summary of Other Financial Assets and Liabilities (Parenthetical) (Detail) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]    
Other financial assets ₩ 1,690,046 ₩ 1,617,956
Ustream Inc. [member]    
Disclosure of detailed information about financial instruments [line items]    
Proceeds from the disposal of Subsidiary 91,445 60,978
Money Market Wrap and Money Market Trust [member]    
Disclosure of detailed information about financial instruments [line items]    
Other financial assets ₩ 406,062 ₩ 610,862