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Net Sales - Summary of Disaggregation of Net Sales by Geographical Region and Segment and Product Group (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	$ 4,969	$ 5,526	$ 6,638
North America [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	1,914	2,144	2,378
Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	1,384	1,543	1,720
Europe, the Middle East, and Africa [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	1,086	1,163	1,685
Latin America [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	585	676	855
Topic 606 [Member] | Transferred at a Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	4,969	5,526	6,638
Topic 606 [Member] | Transferred at a Point in Time [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	1,914	2,144	2,378
Topic 606 [Member] | Transferred at a Point in Time [Member] | North America [Member] | Titanium Technologies [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	776	727	894
Topic 606 [Member] | Transferred at a Point in Time [Member] | North America [Member] | Thermal & Specialized Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	520	592	619
Topic 606 [Member] | Transferred at a Point in Time [Member] | North America [Member] | Advanced Performance Materials [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	407	512	524
Topic 606 [Member] | Transferred at a Point in Time [Member] | North America [Member] | Chemical Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	211	313	341
Topic 606 [Member] | Transferred at a Point in Time [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	1,384	1,543	1,720
Topic 606 [Member] | Transferred at a Point in Time [Member] | Asia Pacific [Member] | Titanium Technologies [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	778	809	964
Topic 606 [Member] | Transferred at a Point in Time [Member] | Asia Pacific [Member] | Thermal & Specialized Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	134	166	160
Topic 606 [Member] | Transferred at a Point in Time [Member] | Asia Pacific [Member] | Advanced Performance Materials [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	450	507	515
Topic 606 [Member] | Transferred at a Point in Time [Member] | Asia Pacific [Member] | Chemical Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	22	61	81
Topic 606 [Member] | Transferred at a Point in Time [Member] | Europe, the Middle East, and Africa [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	1,086	1,163	1,685
Topic 606 [Member] | Transferred at a Point in Time [Member] | Europe, the Middle East, and Africa [Member] | Titanium Technologies [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	528	474	842
Topic 606 [Member] | Transferred at a Point in Time [Member] | Europe, the Middle East, and Africa [Member] | Thermal & Specialized Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	331	408	555
Topic 606 [Member] | Transferred at a Point in Time [Member] | Europe, the Middle East, and Africa [Member] | Advanced Performance Materials [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	202	258	270
Topic 606 [Member] | Transferred at a Point in Time [Member] | Europe, the Middle East, and Africa [Member] | Chemical Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	25	23	18
Topic 606 [Member] | Transferred at a Point in Time [Member] | Latin America [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	585	676	855
Topic 606 [Member] | Transferred at a Point in Time [Member] | Latin America [Member] | Titanium Technologies [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	320	335	474
Topic 606 [Member] | Transferred at a Point in Time [Member] | Latin America [Member] | Thermal & Specialized Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	120	152	163
Topic 606 [Member] | Transferred at a Point in Time [Member] | Latin America [Member] | Advanced Performance Materials [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	45	53	56
Topic 606 [Member] | Transferred at a Point in Time [Member] | Latin America [Member] | Chemical Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	100	136	162
Topic 606 [Member] | Transferred at a Point in Time [Member] | Titanium Dioxide and Other Minerals [Member] | Titanium Technologies [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	2,402	2,345	3,174
Topic 606 [Member] | Transferred at a Point in Time [Member] | Refrigerants [Member] | Thermal & Specialized Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	889	1,086	1,238
Topic 606 [Member] | Transferred at a Point in Time [Member] | Foam, Propellants, and Other [Member] | Thermal & Specialized Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	216	232	259
Topic 606 [Member] | Transferred at a Point in Time [Member] | Fluoropolymers and Advanced Materials [Member] | Advanced Performance Materials [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	1,104	1,330	1,365
Topic 606 [Member] | Transferred at a Point in Time [Member] | Mining Solutions [Member] | Chemical Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	203	268	289
Topic 606 [Member] | Transferred at a Point in Time [Member] | Performance Chemicals and Intermediates [Member] | Chemical Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales	$ 155	$ 265	$ 313

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