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Impairment Testing (Carrying Amounts of Intangible Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Intangible assets [Line Items]    
Intangible assets having an indefined useful life $ 357 $ 409
Goodwill [Member]    
Intangible assets [Line Items]    
Intangible assets having an indefined useful life 326 377
Trademarks [Member]    
Intangible assets [Line Items]    
Intangible assets having an indefined useful life 31 32
Industrial Products, United States [Member] | Trademarks [Member]    
Intangible assets [Line Items]    
Intangible assets having an indefined useful life 13 13
Advanced Additives, United States [Member] | Trademarks [Member]    
Intangible assets [Line Items]    
Intangible assets having an indefined useful life 7 9
Food, United States [Member] | Trademarks [Member]    
Intangible assets [Line Items]    
Intangible assets having an indefined useful life 5 5
Industrial Products, Europe [Member] | Trademarks [Member]    
Intangible assets [Line Items]    
Intangible assets having an indefined useful life 6 5
Specialty Solutions segment [Member] | Goodwill [Member]    
Intangible assets [Line Items]    
Intangible assets having an indefined useful life 207 211
Essential Minerals segment [Member] | Goodwill [Member]    
Intangible assets [Line Items]    
Intangible assets having an indefined useful life $ 119 $ 166