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Stock-based Compensation - Performance Share Units Activity (Parenthetical) (Details) - Performance Share Units [Member] - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of shares vested 176,000 761,000 19,000
Number of non-issued shares cancelled 51,000 57,000  
Chemours Company Equity and Incentive Plan (the "Prior Plan") [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of shares vested   1,520,000  
Number of non-issued shares cancelled   680,000