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Asset Impairment, Exit, and Restructuring Costs (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Asset Impairment Charges And Exit Costs [Line Items]    
Asset Impairment Charges   $ 11
Restructuring Costs and Asset Impairment Charges $ 4  
Agricultural Services [Member]    
Asset Impairment Charges And Exit Costs [Line Items]    
Restructuring Charges $ 6