Organization And Summary Of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Organization And Summary Of Significant Accounting Policies	Organization and Summary of Significant Accounting Policies A. Organization GrafTech International Ltd. (the “Company”) is a leading manufacturer of high-quality graphite electrode products essential to the production of electric arc furnace ("EAF") steel and other ferrous and non-ferrous metals. References herein to “GTI,” “we,” “our,” or “us” refer collectively to the Company and its subsidiaries. On August 15, 2015, GTI became an indirect wholly owned subsidiary of Brookfield. In April 2018, we completed our initial public offering ("IPO") of 38,097,525 shares of our common stock held by Brookfield at a price of $15.00 per share. We did not receive any proceeds related to the IPO. Our common stock is listed on the New York Stock Exchange under the symbol “EAF.” Brookfield has since distributed a portion of its GrafTech common stock to the owners in the Brookfield consortium and sold shares of GrafTech common stock in public and private transactions, resulting in a reduction of Brookfield's ownership of outstanding shares of GrafTech common stock to 24.3% as of December 31, 2021 and 24.6% as of March 31, 2022. The Company’s only reportable segment, Industrial Materials, is comprised of our two major product categories: graphite electrodes and petroleum needle coke products. Petroleum needle coke is a key raw material used in the production of graphite electrodes. The Company's vision is to provide highly engineered graphite electrode products, services and solutions to electric arc furnace operators. B. Basis of Presentation The interim condensed consolidated financial statements are unaudited; however, in the opinion of management, they have been prepared in accordance with Rule 10-01 of Regulation S-X and in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The December 31, 2021 Consolidated Balance Sheet data included herein was derived from the audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2021, filed on February 22, 2022, but does not include all disclosures required by GAAP in audited financial statements. These interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements, including the accompanying notes, contained in our Annual Report on Form 10-K. The unaudited condensed consolidated financial statements reflect all adjustments (all of which are of a normal, recurring nature) which management considers necessary for a fair presentation of our financial statements for the interim periods presented. The results for the interim periods are not necessarily indicative of results which may be expected for any other interim period or for the full year. Certain items previously reported in specific financial statement captions within the Condensed Consolidated Statements of Cash Flows have been reclassified between lines within cash flow from operations and between lines within financing activities to conform to the current presentation. In addition, items previously presented under Related party Tax Receivable Agreement expense (benefit) on the Condensed Consolidated Statement of Operations have been collapsed into "Other income, net" to conform to the current year presentation. C. New Accounting Standards Recently Adopted Accounting Standards In January 2021, the Financial Accounting Standards Board issued Accounting Standards Update 2021-01, Reference Rate Reform (Topic 848): Scope, which amended Topic 848 reference rate reform to clarify the scope and availability of expedients for certain derivative instruments affected by reference rate reform. We have elected various optional expedients in Topic 848 related to hedging relationships and expect to make future elections related to contract modifications and other hedging relationships. The future election and application of these expedients are not expected to have a material impact on our financial position, results of operations and cash flows.