Operating Segment Information (Details) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2020 USD ($) segment	Sep. 30, 2019 USD ($)
OPERATING SEGMENT INFORMATION
Number of reportable segments | segment							2
Revenues:
Revenue	$ 474			$ 526			$ 1,462	$ 1,666
Segment Adjusted EBITDA
Segment adjusted EBITDA	17			50			111	171
Reconciliation of adjusted EBITDA to net (loss) income:
Interest expense	(18)			(13)			(46)	(40)
Interest income	3			3			9	9
Income tax expense	(3)			(8)			(3)	0
Depreciation and amortization	(29)			(27)			(85)	(82)
Net income attributable to noncontrolling interests	3			2			6	4
Other adjustments:
Business acquisition and integration expenses	0			(2)			(1)	(3)
Gain (loss) on disposition of business/assets	6			(1)			4	(1)
Certain legal expenses/settlements	0			2			3	3
Amortization of pension and postretirement actuarial losses	(3)			(3)			(10)	(11)
Net plant incident costs	(2)			(4)			(5)	(17)
Restructuring, impairment and plant closing and transition costs	(13)			(12)			(25)	(24)
Net (loss) income	(39)	$ (17)	$ 8	(17)	$ 22	$ (2)	(48)	3
Titanium Dioxide
Revenues:
Revenue	343			396			1,083	1,260
Performance Additives
Revenues:
Revenue	131			130			379	406
Operating segments
Segment Adjusted EBITDA
Segment adjusted EBITDA	26			64			142	211
Operating segments | Titanium Dioxide
Revenues:
Revenue	343			396			1,083	1,260
Segment Adjusted EBITDA
Segment adjusted EBITDA	21			51			102	167
Operating segments | Performance Additives
Revenues:
Revenue	131			130			379	406
Segment Adjusted EBITDA
Segment adjusted EBITDA	5			13			40	44
Corporate and other
Segment Adjusted EBITDA
Segment adjusted EBITDA	$ (9)			$ (14)			$ (31)	$ (40)