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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Gross number of share options (or share units) granted during the period.

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Stock-based Compensation - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Mar. 02, 2026	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Apr. 24, 2026
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 7	$ 7	$ 14	$ 12
Chemours Equity and 2026 Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares authorized for grants (in shares)						6,375,275
Shares issued upon conversion of equity stock option awards granted						1
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 1	2	$ 2	4
Stock options outstanding		4,139,000		4,139,000
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 5	4	$ 11	7
Number of shares granted				1,076,000
Stock-based compensation award vesting period				3 years
Shares issued upon conversion of equity award		1		1
Number of shares non-vested		2,212,000		2,212,000
Restricted Stock Units (RSUs) [Member] \| Chemours Equity and 2026 Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted				89,000
Performance Share Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 1		$ 1
Stock-based compensation award vesting period	3 years
Number of shares granted	373,000
Shares issued upon conversion of equity award	1
Number of shares non-vested		620,000		620,000
Percentage of target award available for grant				100.00%
Performance Share Units [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of target award available for grant	0.00%
Performance Share Units [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense			1		1
Percentage of target award available for grant	200.00%
Performance Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense			$ 1		$ 1
Number of shares non-vested		886,000		886,000
Performance Stock Option [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		$ 1		$ 1