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Research and Development Expense	12 Months Ended
Research and Development Expense	Dec. 31, 2017
Research And Development [Abstract]
Research and Development Expense	Note 5. Research and Development Expense R&D expense incurred by Chemours was $80, $80, and $97 for the years ended December 31, 2017, 2016, and 2015, respectively. R&D expense for the year ended December 31, 2015 includes $10 of assigned costs, which are attributable to DuPont’s Corporate Central Research and Development (Central R&D) function’s long-term research activities. This assignment was based on the cost of research projects for which Chemours was determined to be the sponsor or co-sponsor. All research services previously provided to Chemours by DuPont’s Central R&D function were specifically requested by Chemours, covered by service-level agreements, and billed based on usage. DuPont’s R&D services were no longer used after the Separation Date.