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Restructuring and other charges.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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Restructuring, Asset-Related, and Other Charges - Schedule of Restructuring Program (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended			24 Months Ended
	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Employee separation charges		$ 19	$ 25	$ 9
Decommissioning and other charges		14	31	2
Total restructuring and other charges		33	56	11
Asset-related charges		27	97	5
Total restructuring, asset-related, and other charges		60	153	16
Titanium Technologies Transformation Plan [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges		(1)	21
Decommissioning and other charges		11	27
Asset-related charges			78
Other Asset-related Charges
Restructuring Cost and Reserve [Line Items]
Asset-related charges			8
2023 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges			4		$ 4
2024 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges		20
Decommissioning and other charges		3
Asset-related charges		27
2022 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges			(1)
ERP Implementation Abandonment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges	$ 1		1
Decommissioning and other charges			4
Asset-related charges			11
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges		6	1	4
Decommissioning and other charges			4
Total restructuring and other charges		6	5	4
Asset-related charges			12
Total restructuring, asset-related, and other charges		6	17	4
Corporate [Member] \| Titanium Technologies Transformation Plan [Member]
Restructuring Cost and Reserve [Line Items]
Asset-related charges			1
Corporate [Member] \| 2023 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges			1		1
Corporate [Member] \| 2024 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges		6
Corporate [Member] \| 2022 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges			(1)
Corporate [Member] \| ERP Implementation Abandonment Charges [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges			1
Decommissioning and other charges			4
Asset-related charges			11
Titanium Technologies [Member] \| Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges		(1)	21	1
Decommissioning and other charges		11	27
Total restructuring and other charges		10	48	1
Asset-related charges			77	5
Total restructuring, asset-related, and other charges		10	125	6
Titanium Technologies [Member] \| Operating Segments [Member] \| Titanium Technologies Transformation Plan [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges		(1)	21
Decommissioning and other charges		11	27
Asset-related charges			77
Thermal & Specialized Solutions [Member] \| Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges			1	1
Total restructuring and other charges			1	1
Asset-related charges			8
Total restructuring, asset-related, and other charges			9	1
Thermal & Specialized Solutions [Member] \| Operating Segments [Member] \| Other Asset-related Charges
Restructuring Cost and Reserve [Line Items]
Asset-related charges			8
Thermal & Specialized Solutions [Member] \| Operating Segments [Member] \| 2022 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges			1
Advanced Performance Materials [Member] \| 2023 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges					$ 3
Advanced Performance Materials [Member] \| Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges		14	2	3
Decommissioning and other charges		3
Total restructuring and other charges		17	2	3
Asset-related charges		27
Total restructuring, asset-related, and other charges		44	2	3
Advanced Performance Materials [Member] \| Operating Segments [Member] \| 2023 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges			3
Advanced Performance Materials [Member] \| Operating Segments [Member] \| 2024 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges		14
Decommissioning and other charges		3
Asset-related charges		$ 27
Advanced Performance Materials [Member] \| Operating Segments [Member] \| 2022 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges			$ (1)
Other Segment [Member] \| Operating Segments [Member]
Restructuring Cost and Reserve [Line Items]
Decommissioning and other charges				2
Total restructuring and other charges				2
Total restructuring, asset-related, and other charges				$ 2