RESTRUCTURING, IMPAIRMENT AND PLANT CLOSING AND TRANSITION COSTS - RESERVES FOR RESTRUCTURING, IMPAIRMENT AND PLANT CLOSING COSTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accrued restructuring costs roll forward
Accrued liabilities at the beginning of the period	$ 21	$ 90	$ 59
Restructuring charges	45	25	113
Reversal of reserves no longer required	(1)
Distribution of prefunded restructuring costs		(36)
Adjustment to Titanium Dioxide and Performance Additives opening balance sheet liabilities			1
Foreign currency effect on liability balance	1		(6)
Accrued liabilities at the end of the period	34	21	90
Current portion of restructuring reserves	11	14
Long-term portion of restructuring reserves	23	7
2014 initiatives and prior
Accrued restructuring costs roll forward
Restructuring charges			82
Restructuring payments			(59)
2015 initiatives
Accrued restructuring costs roll forward
Restructuring charges			29
Restructuring payments			(16)
2015 initiatives and prior
Accrued restructuring costs roll forward
Accrued liabilities at the beginning of the period	21	90
Restructuring charges		19
Restructuring payments		(52)
Accrued liabilities at the end of the period	9	21	90
2016 initiatives
Accrued restructuring costs roll forward
Restructuring charges		6
Restructuring payments		(6)
2016 initiatives and prior
Accrued restructuring costs roll forward
Restructuring charges	8
Restructuring payments	(20)
2017 initiatives
Accrued restructuring costs roll forward
Restructuring charges	37
Restructuring payments	(12)
Accrued liabilities at the end of the period	25
Titanium Dioxide
Accrued restructuring costs roll forward
Accrued liabilities at the beginning of the period	12	57	49
Reversal of reserves no longer required	(1)
Distribution of prefunded restructuring costs		(23)
Foreign currency effect on liability balance		(2)	(5)
Accrued liabilities at the end of the period	30	12	57
Current portion of restructuring reserves	7
Long-term portion of restructuring reserves	23
Titanium Dioxide | 2014 initiatives and prior
Accrued restructuring costs roll forward
Restructuring charges			46
Restructuring payments			(46)
Titanium Dioxide | 2015 initiatives
Accrued restructuring costs roll forward
Restructuring charges			29
Restructuring payments			(16)
Titanium Dioxide | 2015 initiatives and prior
Accrued restructuring costs roll forward
Restructuring charges		3
Restructuring payments		(23)
Titanium Dioxide | 2016 initiatives
Accrued restructuring costs roll forward
Restructuring charges		6
Restructuring payments		(6)
Titanium Dioxide | 2016 initiatives and prior
Accrued restructuring costs roll forward
Restructuring charges	4
Restructuring payments	(9)
Titanium Dioxide | 2017 initiatives
Accrued restructuring costs roll forward
Restructuring charges	34
Restructuring payments	(10)
Performance Additives
Accrued restructuring costs roll forward
Accrued liabilities at the beginning of the period	9	33	10
Distribution of prefunded restructuring costs		(13)
Adjustment to Titanium Dioxide and Performance Additives opening balance sheet liabilities			1
Foreign currency effect on liability balance	1	2	(1)
Accrued liabilities at the end of the period	4	9	33
Current portion of restructuring reserves	4
Performance Additives | 2014 initiatives and prior
Accrued restructuring costs roll forward
Restructuring charges			36
Restructuring payments			$ (13)
Performance Additives | 2015 initiatives and prior
Accrued restructuring costs roll forward
Restructuring charges		16
Restructuring payments		$ (29)
Performance Additives | 2016 initiatives and prior
Accrued restructuring costs roll forward
Restructuring charges	4
Restructuring payments	(11)
Performance Additives | 2017 initiatives
Accrued restructuring costs roll forward
Restructuring charges	3
Restructuring payments	$ (2)