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Asset Impairment, Exit, and Restructuring Costs	3 Months Ended
Asset Impairment, Exit, and Restructuring Costs	Mar. 31, 2018
Restructuring, Settlement and Impairment Provisions [Abstract]
Asset Impairment, Exit, and Restructuring Costs	Asset Impairment, Exit, and Restructuring Costs Asset impairment, exit, and restructuring costs in the three months ended March 31, 2018 consisted of $12 million of an equity investment impairment in the Carbohydrate Solutions segment and $4 million of individually insignificant restructuring charges. Asset impairment, exit, and restructuring costs in the three months ended March 31, 2017 consisted of $6 million of restructuring charges in the Origination segment and $4 million of other individually insignificant fixed asset impairments and restructuring charges.