Guarantor Condensed Consolidating Financial Information - Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) - 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
Condensed Income Statements, Captions [Line Items]
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
Equity in earnings of subsidiaries									0	0	0
Interest (expense) income, net									(195)	(214)	(219)
(Loss) gain on extinguishment of debt									(38)	(1)	6
Intercompany interest income (expense), net									0	0	0
Other income (expense), net									162	113	267
Income (loss) before income taxes	182	269	323	381	264	250	225	173	1,155	912	(11)
(Benefit from) provision for 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
Comprehensive (loss) income attributable to Chemours									873	881	(34)
Eliminations and Adjustments [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									(1,820)	(1,734)	(1,571)
Cost of goods sold									(1,825)	(1,691)	(1,543)
Gross profit									5	(43)	(28)
Selling, general, and administrative expense									(24)	(38)	(20)
Research and development expense									0	0	0
Restructuring, asset-related, and other charges									0	0	0
Total other operating expenses									(24)	(38)	(20)
Equity in earnings of affiliates									0	0	0
Equity in earnings of subsidiaries									(1,157)	(849)	(100)
Interest (expense) income, net									0	0	0
(Loss) gain on extinguishment of debt									0	0	0
Intercompany interest income (expense), net									0	0	0
Other income (expense), net									(22)	(34)	(20)
Income (loss) before income taxes									(1,150)	(888)	(128)
(Benefit from) provision for income taxes									0	(4)	(7)
Net income (loss)									(1,150)	(884)	(121)
Less: Net income attributable to non-controlling interests									0	0	0
Net income (loss) attributable to Chemours									(1,150)	(884)	(121)
Comprehensive (loss) income attributable to Chemours									(1,012)	(1,081)	(66)
Parent Issuer [Member] | Reportable Legal Entities [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									0	0	0
Cost of goods sold									0	0	0
Gross profit									0	0	0
Selling, general, and administrative expense									33	36	21
Research and development expense									0	0	0
Restructuring, asset-related, and other charges									0	0	0
Total other operating expenses									33	36	21
Equity in earnings of affiliates									0	0	0
Equity in earnings of subsidiaries									1,155	849	100
Interest (expense) income, net									(210)	(220)	(217)
(Loss) gain on extinguishment of debt									(38)	(1)	6
Intercompany interest income (expense), net									47	64	60
Other income (expense), net									25	29	20
Income (loss) before income taxes									946	685	(52)
(Benefit from) provision for income taxes									(50)	(62)	(59)
Net income (loss)									996	747	7
Less: Net income attributable to non-controlling interests									0	0	0
Net income (loss) attributable to Chemours									996	747	7
Comprehensive (loss) income attributable to Chemours									873	881	(34)
Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									3,974	3,887	3,749
Cost of goods sold									3,112	3,084	3,218
Gross profit									862	803	531
Selling, general, and administrative expense									485	449	794
Research and development expense									76	74	77
Restructuring, asset-related, and other charges									46	56	168
Total other operating expenses									607	579	1,039
Equity in earnings of affiliates									0	0	4
Equity in earnings of subsidiaries									2	0	0
Interest (expense) income, net									5	3	(3)
(Loss) gain on extinguishment of debt									0	0	0
Intercompany interest income (expense), net									10	0	4
Other income (expense), net									199	139	193
Income (loss) before income taxes									471	366	(310)
(Benefit from) provision for income taxes									98	117	(52)
Net income (loss)									373	249	(258)
Less: Net income attributable to non-controlling interests									0	0	0
Net income (loss) attributable to Chemours									373	249	(258)
Comprehensive (loss) income attributable to Chemours									375	253	(255)
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									4,484	4,030	3,222
Cost of goods sold									3,380	3,045	2,622
Gross profit									1,104	985	600
Selling, general, and administrative expense									163	179	151
Research and development expense									6	7	4
Restructuring, asset-related, and other charges									3	1	2
Total other operating expenses									172	187	157
Equity in earnings of affiliates									43	33	25
Equity in earnings of subsidiaries									0	0	0
Interest (expense) income, net									10	3	1
(Loss) gain on extinguishment of debt									0	0	0
Intercompany interest income (expense), net									(57)	(64)	(64)
Other income (expense), net									(40)	(21)	74
Income (loss) before income taxes									888	749	479
(Benefit from) provision for income taxes									111	114	100
Net income (loss)									777	635	379
Less: Net income attributable to non-controlling interests									1	1	0
Net income (loss) attributable to Chemours									776	634	379
Comprehensive (loss) income attributable to Chemours									$ 637	$ 828	$ 321