Operating Segment Information - Financial Information by Segment (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
OPERATING SEGMENT INFORMATION
Number of reportable segments | segment									2
Revenues:
Revenues									$ 2,130	$ 2,265	$ 2,209
Segment Adjusted EBITDA
Segment adjusted EBITDA									194	436	395
Reconciliation of adjusted EBITDA to net (loss) income:
Interest expense									(53)	(53)	(100)
Interest income									12	13	60
Income tax (expense) benefit—continuing operations									(150)	8	(50)
Depreciation and amortization									(110)	(132)	(127)
Net income attributable to noncontrolling interests									5	6	10
Other adjustments:
Business acquisition and integration expenses									1	(20)	(5)
Separation gain (expense), net									3	(2)	(7)
U.S. income tax reform									0	0	34
Net income of discontinued operations, net of tax									0	0	8
(Loss) gain on disposition of business/assets									(1)	(2)	0
Certain legal settlements and related expenses									(4)	0	(1)
Amortization of pension and postretirement actuarial losses									(14)	(15)	(17)
Net plant incident (costs) credits									(20)	232	(4)
Restructuring, impairment and plant closing and transition costs	$ (9)	$ (12)	$ 0	$ (12)	$ (55)	$ (428)	$ (136)	$ (9)	(33)	(628)	(52)
Net (loss) income	(173)	$ (17)	$ 22	$ (2)	(69)	$ (366)	$ 198	$ 80	(170)	(157)	144
Depreciation and Amortization:
Depreciation and amortization									110	132	127
Capital Expenditures:
Capital Expenditures									152	326	197
Total Assets
Total Assets	2,265				2,485				2,265	2,485
Operating segments
Segment Adjusted EBITDA
Segment adjusted EBITDA									244	479	459
Operating segments | Titanium Dioxide
Revenues:
Revenues									1,614	1,666	1,604
Segment Adjusted EBITDA
Segment adjusted EBITDA									197	417	387
Reconciliation of adjusted EBITDA to net (loss) income:
Depreciation and amortization									(79)	(93)	(85)
Depreciation and Amortization:
Depreciation and amortization									79	93	85
Capital Expenditures:
Capital Expenditures									133	301	178
Total Assets
Total Assets	1,670				1,631				1,670	1,631
Operating segments | Performance Additives
Revenues:
Revenues									516	599	605
Segment Adjusted EBITDA
Segment adjusted EBITDA									47	62	72
Reconciliation of adjusted EBITDA to net (loss) income:
Depreciation and amortization									(27)	(27)	(36)
Depreciation and Amortization:
Depreciation and amortization									27	27	36
Capital Expenditures:
Capital Expenditures									18	24	17
Total Assets
Total Assets	540				592				540	592
Corporate and Other
Segment Adjusted EBITDA
Segment adjusted EBITDA									(50)	(43)	(64)
Reconciliation of adjusted EBITDA to net (loss) income:
Depreciation and amortization									(4)	(12)	(6)
Depreciation and Amortization:
Depreciation and amortization									4	12	6
Capital Expenditures:
Capital Expenditures									1	1	$ 2
Total Assets
Total Assets	$ 55				$ 262				$ 55	$ 262