Announcement date of plant closing.

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Approved date of plant closing.

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contract termination charges.

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Decommissioning and other charges.

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Effective date of plant closing.

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Restructuring charges asset-related and other charges.

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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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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Restructuring, Asset-Related, and Other Charges - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended	32 Months Ended	267 Months Ended
	Jan. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2026	Mar. 31, 2026	Mar. 31, 2026
Restructuring Cost and Reserve [Line Items]
Restructuring, asset-related, and other charges		$ 13	$ 33
Asset-related impairment		1	12
Employee separation charges		9	13
Decommissioning and other charges		3	8
Cash payments		5
SPS CapstoneTM Exit [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, asset-related, and other charges		4
Asset-related impairment		1	12
Employee separation charges			13
Decommissioning and other charges	$ 4	3	2
2024 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges						$ 51
Asset-related impairment						27
Employee separation charges						19
Decommissioning and other charges			1			$ 5
Cash payments		1
2024 Restructuring Program [Member] \| Advanced Performance Materials [Member] \| Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Decommissioning and other charges				$ 2
2026 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		9
Employee separation charges		9
Cash payments		$ 4
Titanium Technologies Transformation Plan [Member]
Restructuring Cost and Reserve [Line Items]
Announcement date of plant closing		Jul. 27, 2023
Effective date of plant closing		Aug. 01, 2023
Approved date of plant closing		Jul. 26, 2023
Decommissioning and other charges			$ 5
Titanium Technologies Transformation Plan [Member] \| Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					$ 142
Asset-related impairment					78
Employee separation charges					20
Contract Termination Charges					14
Decommissioning and other charges					$ 30
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]					Restructuring, asset-related, and other charges
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, asset-related, and other charges		$ 2
Employee separation charges		2
Corporate [Member] \| 2026 Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Employee separation charges		$ 2