OPERATING SEGMENT INFORMATION - FINANCIAL INFORMATION BY SEGMENT (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) segment	Sep. 30, 2016 USD ($)
OPERATING SEGMENT INFORMATION
Number of reportable segments | segment			2
Revenues	$ 582	$ 532	$ 1,681	$ 1,648
Segment adjusted EBITDA	134	21	277	38
Reconciliation of adjusted EBITDA to net income (loss):
Interest expense	(30)	(14)	(54)	(44)
Interest income	22	2	25	13
Income tax (expense) benefit- continuing operations	(14)	7	(26)	14
Depreciation and amortization	(35)	(30)	(95)	(84)
Net income attributable to noncontrolling interests	2	3	8	8
Other adjustments:
Business acquisition and integration expenses	(4)	(3)	(2)	(11)
Gain on disposition of businesses/assets		23		23
Income from discontinued operations, net of tax		2	8	8
Certain legal settlements and related expenses			(1)	(1)
Amortization of pension and postretirement actuarial losses	(5)	(3)	(13)	(8)
Net plant incident (costs) credits	(1)	(3)	(4)	2
Restructuring, impairment and plant closing costs	(16)	(7)	(49)	(31)
Net income (loss)	53	(2)	74	(73)
Operating segments
OPERATING SEGMENT INFORMATION
Segment adjusted EBITDA	142	38	325	84
Operating segments | Titanium Dioxide
OPERATING SEGMENT INFORMATION
Revenues	431	392	1,217	1,197
Segment adjusted EBITDA	127	22	268	28
Operating segments | Performance Additives
OPERATING SEGMENT INFORMATION
Revenues	151	140	464	451
Segment adjusted EBITDA	15	16	57	56
Corporate and Other
OPERATING SEGMENT INFORMATION
Segment adjusted EBITDA	$ (8)	$ (17)	$ (48)	$ (46)