Restructuring, Impairment, and Plant Closing and Transition Costs - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		57 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2024
Restructuring, impairment and plant closing costs
Restructuring expense			$ 11
Proceeds from sale of business/assets			6	$ 0
Gain (loss) on disposition of business/assets			6	0
Accelerated depreciation	$ 9	$ 7	11	19
Cash charges	1	5	11	19
Workforce reductions
Restructuring, impairment and plant closing costs
Restructuring expense			4
Titanium Dioxide
Restructuring, impairment and plant closing costs
Restructuring expense			10
Company wide | Workforce reductions
Restructuring, impairment and plant closing costs
Restructuring expense	0	1	0	5
South Africa | Titanium Dioxide
Restructuring, impairment and plant closing costs
Restructuring expense	0	0	0	1
Proceeds from sale of business/assets	6
Gain (loss) on disposition of business/assets	6
Calais, France | Titanium Dioxide
Restructuring, impairment and plant closing costs
Restructuring expense	0	3	4	5
Additional restructuring charges remaining	13		13
Pori, Finland | Titanium Dioxide | Facility closing
Restructuring, impairment and plant closing costs
Restructuring expense	10		18	11
Additional restructuring charges remaining	87		87
Accelerated depreciation	9	6	11	17
Severance costs		1	2	5
Plant shut down costs	1	1	5	3
Other noncash charges	9	6	11	3
Cash charges	1	2	7	8
Gain (loss) on restructuring		8		14
Beltsville, Maryland
Restructuring, impairment and plant closing costs
Accelerated depreciation	$ 0	$ 0	$ 0	$ 2
Forecast | Pori, Finland | Titanium Dioxide | Facility closing
Restructuring, impairment and plant closing costs
Accelerated depreciation					$ 7
Severance costs					1
Plant shut down costs					77
Other noncash charges					9
Cash charges					78
Write off of other assets					$ 2