Organization, Description of the Business and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Organization, Description of the Business and Summary of Significant Accounting Policies	Organization, Description of the Business and Summary of Significant Accounting Policies Orion Engineered Carbons S.A.’s unaudited Condensed Consolidated Financial Information includes Orion Engineered Carbons S.A. and its subsidiaries (“Orion” or the “Company”). The unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for annual financial statements. These financial statements should be read in conjunction with the Consolidated Financial Statements included in our Annual Report in Form 10-K for the fiscal year ended December 31, 2020. The accompanying unaudited Condensed Consolidated Financial Statements include all adjustments that are necessary for the fair presentation of our results for the interim periods presented. Results for interim periods are not necessarily indicative of results to be expected for the full year. Summary of Significant Accounting Policies Adoption of accounting standards In January 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2020-01, Investments - Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815). The amendments in this update clarify the interaction of the accounting for equity securities under Topic 321 and investments accounted for under the equity method of accounting in Topic 323 and the accounting for certain forward contracts and purchased options accounted for under Topic 815. The amendments in this update are effective for fiscal years beginning after December 15, 2020, and interim periods within those fiscal years. We adopted this standard on January 1, 2021. The adoption of this standard did not materially impact our Consolidated Financial Statements. Reference Rate Reform (Topic 848)—In March 2020, FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (ASU 2020-04), a new standard. In January 2021, FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope, which refines the scope of ASC 848 and clarifies some of its guidance as part of the Board’s monitoring of global reference rate reform. This guidance permits entities to elect certain optional expedients and exceptions when accounting for contract modifications for receivables, debt, and leases related to reference rate reform as well as derivative contracts and certain hedging relationships affected by reference rate reform activities under way in global financial markets. The Company adopted this guidance prospectively from July 1, 2021. The adoption of this standard did not impact our Consolidated Financial Statements. The adoption of this ASU will enable us to update our assessments of effectiveness, probability, and hedged risk in order to continue hedge accounting for the designated hedges that reference LIBOR, which is expected to be discontinued as a result of reference rate reform. The Company will continue to evaluate the guidance to determine the timing and extent to which we will apply other accounting relief provided by the guidance.