Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 794	$ 945	$ 1,502	$ 1,910
TiO2
Disaggregation of Revenue [Line Items]
Net sales	611	769	1,171	1,542
Zircon
Disaggregation of Revenue [Line Items]
Net sales	95	111	167	219
Other products
Disaggregation of Revenue [Line Items]
Net sales	88	65	164	149
North America
Disaggregation of Revenue [Line Items]
Net sales	204	205	393	400
South and Central America
Disaggregation of Revenue [Line Items]
Net sales	41	73	82	140
Europe, Middle-East and Africa
Disaggregation of Revenue [Line Items]
Net sales	319	361	602	738
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	$ 230	$ 306	$ 425	$ 632