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Acquisitions and Divestitures - Narrative (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2019
USD ($)
Apr. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2016
a
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Apr. 02, 2018
USD ($)
Business Acquisition [Line Items]                  
Goodwill           $ 153,000,000 $ 153,000,000    
Recognized gain on sale of land     $ 42,000,000     8,000,000 10,000,000 $ 45,000,000  
Net cash proceeds of transaction     39,000,000     5,000,000 9,000,000 46,000,000  
Environmental remediation activities amount     $ 3,000,000     $ 71,000,000 200,000,000 101,000,000  
Linden, New Jersey [Member]                  
Business Acquisition [Line Items]                  
Number of acre of land for sale | a       210          
Southern Ionics Minerals, LLC [Member]                  
Business Acquisition [Line Items]                  
Estimated total consideration $ 25,000,000                
Upfront payment 10,000,000                
Installment payment 10,000,000       $ 10,000,000        
Contingent considerations with estimated fair value 5,000,000                
Goodwill $ 0                
Southern Ionics Minerals, LLC [Member] | Maximum [Member]                  
Business Acquisition [Line Items]                  
Acquisition-related expenses             1,000,000    
ICOR International, Inc. [Member]                  
Business Acquisition [Line Items]                  
Goodwill               4,000,000 $ 6,000,000
Total consideration in all cash acquisition   $ 37,000,000              
ICOR International, Inc. [Member] | Maximum [Member]                  
Business Acquisition [Line Items]                  
Acquisition-related expenses               $ 1,000,000  
Methylamines and Methylamides Business [Member]                  
Business Acquisition [Line Items]                  
Maximum agreed loss on sale of business under asset purchase agreement             2,000,000    
Cash proceeds received             2,000,000    
Accelerated depreciation             34,000,000    
Additional pre-tax loss on sale             $ 2,000,000