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General, Description of Business, Recent Developments and Basis of Presentation (Details)
 9 Months Ended
Sep. 30, 2020
facility
segment
OPERATING SEGMENT INFORMATION  
Number of reportable segments | segment 2
Titanium Dioxide  
OPERATING SEGMENT INFORMATION  
Number of manufacturing and processing facilities 7
Performance Additives  
OPERATING SEGMENT INFORMATION  
Number of manufacturing and processing facilities 16