Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net sales	$ 1,464	$ 1,628	$ 1,816	$ 1,730	$ 1,575	$ 1,584	$ 1,588	$ 1,437	$ 6,638	$ 6,183	$ 5,400
Cost of goods sold	1,064	1,151	1,259	1,193	1,090	1,119	1,150	1,081	4,667	4,438	4,297
Gross profit									1,971	1,745	1,103
Selling, general, and administrative expense									657	626	946
Research and development expense									82	81	81
Restructuring, asset-related, and other charges									49	57	170
Total other operating expenses									788	764	1,197
Equity in earnings of affiliates									43	33	29
Interest expense, net									(195)	(214)	(219)
(Loss) gain on extinguishment of debt									(38)	(1)	6
Other income, net									162	113	267
Income (loss) before income taxes	182	269	323	381	264	250	225	173	1,155	912	(11)
Provision for (benefit from) income taxes									159	165	(18)
Net income (loss)	142	275	282	297	228	207	161	151	996	747	7
Less: Net income attributable to non-controlling interests									1	1	0
Net income (loss) attributable to Chemours	$ 142	$ 275	$ 281	$ 297	$ 228	$ 207	$ 161	$ 150	$ 995	$ 746	$ 7
Per share data
Basic earnings per share of common stock	$ 0.83	$ 1.56	$ 1.58	$ 1.63	$ 1.23	$ 1.12	$ 0.87	$ 0.82	$ 5.62	$ 4.04	$ 0.04
Diluted earnings per share of common stock	$ 0.81	$ 1.51	$ 1.53	$ 1.58	$ 1.19	$ 1.08	$ 0.84	$ 0.79	$ 5.45	$ 3.91	$ 0.04