XML 125 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Feb. 17, 2020
Jun. 30, 2019
Cover page.      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 1-13888    
Entity Registrant Name GRAFTECH INTERNATIONAL LTD.    
Entity Incorporation, State DE    
Entity Tax Identification Number 27-2496053    
Entity Address, Street 982 Keynote Circle    
Entity Address, City Brooklyn Heights    
Entity Address, State OH    
Entity Address, Zip Code 44131    
City Area Code 216    
Local Phone Number 676-2000    
Title of each class: Common Stock, $0.01 par value per share    
Trading Symbol(s) EAF    
Name of each exchange on which registered NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 702.5
Entity Common Stock, Shares Outstanding   268,930,987  
Documents Incorporated by Reference
Portions of the definitive proxy statement (the “Definitive Proxy Statement”) to be filed with the Securities and Exchange Commission relative to the registrant’s 2020 Annual Meeting of Stockholders are incorporated by reference into Part III of this Report.
    
Entity Central Index Key 0000931148    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Amendment Flag false