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Investments in Affiliates - Schedule of Investments in Affiliates (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Investments in Affiliates        
Investments in affiliates $ 167 $ 162 $ 160 $ 173
Chemours-Mitsui Fluorochemicals Company, Ltd. [Member] | Japan [Member]        
Investments in Affiliates        
Investments in affiliates $ 104 $ 96    
Ownership 50.00% 50.00%    
The Chemours Chenguang Fluoromaterials Company Limited [Member] | China [Member]        
Investments in Affiliates        
Investments in affiliates $ 32 $ 33    
Ownership 50.00% 50.00%    
Changshu 3F Zhonghao New Chemical Materials Co., Ltd. [Member] | China [Member]        
Investments in Affiliates        
Investments in affiliates $ 31 $ 33    
Ownership 10.00% 10.00%