Revenue (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 464	$ 526	$ 578	$ 562	$ 484	$ 533	$ 626	$ 622	$ 2,130	$ 2,265	$ 2,209
Minimum
Disaggregation of Revenue [Line Items]
Payment period									30 days
Maximum
Disaggregation of Revenue [Line Items]
Payment period									90 days
TiO2
Disaggregation of Revenue [Line Items]
Revenue									$ 1,614	1,666	1,604
Color Pigments
Disaggregation of Revenue [Line Items]
Revenue									258	294	302
Functional Additives
Disaggregation of Revenue [Line Items]
Revenue									118	140	130
Timber Treatment
Disaggregation of Revenue [Line Items]
Revenue									118	142	151
Water Treatment
Disaggregation of Revenue [Line Items]
Revenue									22	23	22
Europe
Disaggregation of Revenue [Line Items]
Revenue									968	1,034	988
North America
Disaggregation of Revenue [Line Items]
Revenue									546	573	582
Asia
Disaggregation of Revenue [Line Items]
Revenue									430	466	446
Other
Disaggregation of Revenue [Line Items]
Revenue									186	192	193
Titanium Dioxide
Disaggregation of Revenue [Line Items]
Revenue									1,614	1,666	1,604
Titanium Dioxide | TiO2
Disaggregation of Revenue [Line Items]
Revenue									1,614	1,666	1,604
Titanium Dioxide | Color Pigments
Disaggregation of Revenue [Line Items]
Revenue									0	0	0
Titanium Dioxide | Functional Additives
Disaggregation of Revenue [Line Items]
Revenue									0	0	0
Titanium Dioxide | Timber Treatment
Disaggregation of Revenue [Line Items]
Revenue									0	0	0
Titanium Dioxide | Water Treatment
Disaggregation of Revenue [Line Items]
Revenue									0	0	0
Titanium Dioxide | Europe
Disaggregation of Revenue [Line Items]
Revenue									786	828	794
Titanium Dioxide | North America
Disaggregation of Revenue [Line Items]
Revenue									320	296	281
Titanium Dioxide | Asia
Disaggregation of Revenue [Line Items]
Revenue									343	368	349
Titanium Dioxide | Other
Disaggregation of Revenue [Line Items]
Revenue									165	174	180
Performance Additives
Disaggregation of Revenue [Line Items]
Revenue									516	599	605
Performance Additives | TiO2
Disaggregation of Revenue [Line Items]
Revenue									0	0	0
Performance Additives | Color Pigments
Disaggregation of Revenue [Line Items]
Revenue									258	294	302
Performance Additives | Functional Additives
Disaggregation of Revenue [Line Items]
Revenue									118	140	130
Performance Additives | Timber Treatment
Disaggregation of Revenue [Line Items]
Revenue									118	142	151
Performance Additives | Water Treatment
Disaggregation of Revenue [Line Items]
Revenue									22	23	22
Performance Additives | Europe
Disaggregation of Revenue [Line Items]
Revenue									182	206	194
Performance Additives | North America
Disaggregation of Revenue [Line Items]
Revenue									226	277	301
Performance Additives | Asia
Disaggregation of Revenue [Line Items]
Revenue									87	98	97
Performance Additives | Other
Disaggregation of Revenue [Line Items]
Revenue									$ 21	$ 18	$ 13