XML 13 R1.htm IDEA: XBRL DOCUMENT v3.19.1
Document and Entity Information
 12 Months Ended
Dec. 31, 2018
shares
Document and entity information [abstract]  
Document Type 20-F
Amendment Flag false
Document Period End Date Dec. 31, 2018
Document Fiscal Year Focus 2018
Document Fiscal Period Focus FY
Trading Symbol KT
Entity Registrant Name KT Corporation
Entity Central Index Key 0000892450
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Emerging Growth Company false
Entity Shell Company false
Entity Ex Transition Period false
Entity Common Stock, Shares Outstanding 245,144,768