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8-K Cover
 3 Months Ended
Feb. 18, 2021
Mar. 31, 2021
Cover [Abstract]    
Document Type 8-K  
Document Period End Date   May 06, 2021
Entity Registrant Name ORION ENGINEERED CARBONS S.A.  
Entity Incorporation, State or Country Code N4  
Entity File Number 001-36563  
Entity Tax Identification Number 00-0000000  
Entity Address, Address Line One 4501 Magnolia Cove Drive Suite 106  
Entity Address, City or Town Houston,  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77345  
City Area Code 281  
Local Phone Number 318-2959  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Title of 12(b) Security Common Shares, no par value  
Trading Symbol OEC  
Security Exchange Name NYSE  
Entity Emerging Growth Company false  
Entity Central Index Key 0001609804  
Amendment Flag false