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Net Sales - Summary of Disaggregation of Net Sales by Geographical Region and Segment and Product Group (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]
Disaggregation of Net Sales	$ 1,353	$ 1,390	$ 1,408	$ 1,376	$ 1,464	$ 1,628	$ 1,816	$ 1,730	$ 5,526	$ 6,638	$ 6,183
Fluorochemicals [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									1,318	1,497	1,378
Fluoropolymers [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									1,330	1,365	1,276
Mining Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									268	289	261
Performance Chemicals and Intermediates [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									265	313	306
Titanium Dioxide and Other Minerals [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									2,345	3,174	2,958
North America [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									2,144	2,378	2,255
Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									1,543	1,720	1,593
Europe, the Middle East, and Africa [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									1,163	1,685	1,506
Latin America [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									676	855	$ 829
Topic 606 [Member] | Transferred at a Point in Time [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									5,526	6,638
Topic 606 [Member] | Transferred at a Point in Time [Member] | Fluoroproducts [Member] | Fluorochemicals [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									1,318	1,497
Topic 606 [Member] | Transferred at a Point in Time [Member] | Fluoroproducts [Member] | Fluoropolymers [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									1,330	1,365
Topic 606 [Member] | Transferred at a Point in Time [Member] | Chemical Solutions [Member] | Mining Solutions [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									268	289
Topic 606 [Member] | Transferred at a Point in Time [Member] | Chemical Solutions [Member] | Performance Chemicals and Intermediates [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									265	313
Topic 606 [Member] | Transferred at a Point in Time [Member] | Titanium Technologies [Member] | Titanium Dioxide and Other Minerals [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									2,345	3,174
Topic 606 [Member] | Transferred at a Point in Time [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									2,144	2,378
Topic 606 [Member] | Transferred at a Point in Time [Member] | North America [Member] | Fluoroproducts [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									1,104	1,143
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									313	341
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									727	894
Topic 606 [Member] | Transferred at a Point in Time [Member] | Asia Pacific [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									1,543	1,720
Topic 606 [Member] | Transferred at a Point in Time [Member] | Asia Pacific [Member] | Fluoroproducts [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									673	675
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									61	81
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									809	964
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									1,163	1,685
Topic 606 [Member] | Transferred at a Point in Time [Member] | Europe, the Middle East, and Africa [Member] | Fluoroproducts [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									666	825
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									23	18
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									474	842
Topic 606 [Member] | Transferred at a Point in Time [Member] | Latin America [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									676	855
Topic 606 [Member] | Transferred at a Point in Time [Member] | Latin America [Member] | Fluoroproducts [Member]
Disaggregation Of Revenue [Line Items]
Disaggregation of Net Sales									205	219
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									136	162
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									$ 335	$ 474

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