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Operating Segments (Sales by Business Lines) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Operating segment data [Line Items]      
Sales $ 5,418 $ 5,363 $ 5,405
Percentage of sales 100.00% 100.00% 100.00%
Specialty Solutions Segment [Member]      
Operating segment data [Line Items]      
Sales $ 2,666 $ 2,577 $ 2,428
Percentage of sales 49.00% 48.00% 44.00%
Advanced Additives [Member]      
Operating segment data [Line Items]      
Sales $ 877 $ 798 $ 781
Percentage of sales 16.00% 15.00% 14.00%
Industrial Products [Member]      
Operating segment data [Line Items]      
Sales $ 1,193 $ 1,120 $ 1,034
Percentage of sales 22.00% 21.00% 19.00%
Food Specialties [Member]      
Operating segment data [Line Items]      
Sales $ 596 $ 659 $ 613
Percentage of sales 11.00% 12.00% 11.00%
Essential Minerals Segment [Member]      
Operating segment data [Line Items]      
Sales $ 3,127 $ 3,162 $ 3,259
Percentage of sales 58.00% 59.00% 61.00%
Potash & Magnesium [Member]      
Operating segment data [Line Items]      
Sales $ 1,383 $ 1,338 $ 1,515
Percentage of sales 26.00% 25.00% 28.00%
Phosphate [Member]      
Operating segment data [Line Items]      
Sales $ 1,052 $ 1,163 $ 1,064
Percentage of sales 19.00% 22.00% 20.00%
Specialty Fertilizers [Member]      
Operating segment data [Line Items]      
Sales $ 692 $ 661 $ 680
Percentage of sales 13.00% 12.00% 13.00%
Other activities and intercompany sales [Member]      
Operating segment data [Line Items]      
Sales $ (375) $ (376) $ (282)
Percentage of sales (7.00%) (7.00%) (5.00%)