Additional number of shares issued during the period as a result of an employee stock purchase plan.

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Common stock, shares issued upon conversion of equity award.

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Employee stock purchase plan initial offering period.

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Number of purchase periods in offer period.

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Share based compensation arrangement by share based payment award consecutive offering period.

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Share based compensation, shares issued upon conversion of equity stock option award granted.

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Share based compensation, shares issued upon conversion of equity stock other than option awards granted.

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Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Target Award Available for Grant

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

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Aggregate number of common shares reserved for future issuance.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Discount rate from fair value on purchase date that participants pay for shares.

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The weighted average fair value at grant date for nonvested equity-based awards issued 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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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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Number of additional shares authorized for issuance under share-based payment arrangement.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.

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Stock-based Compensation - Narrative (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 26, 2017 Period shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($) $ / shares shares	Apr. 26, 2017 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense \| $		$ 16	$ 19	$ 24
Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense \| $		$ 9	$ 9	$ 8
Expiration period		10 years	10 years	10 years
Stock-based compensation award vesting period		3 years	3 years	3 years
Total intrinsic value of options exercised \| $		$ 12	$ 2	$ 37
Unrecognized stock-based compensation expense related to stock options \| $		$ 7
Unrecognized stock-based compensation expense period for recognition		1 year 9 months 10 days
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense \| $		$ 7	$ 7	$ 7
Stock-based compensation award vesting period		3 years
Unrecognized stock-based compensation expense period for recognition		1 year 2 months 23 days
Shares issued upon conversion of equity award		1
Unrecognized compensation cost related to equity awards other than options \| $		$ 12
Weighted-average fair value at grant date (in dollars per share) \| $ / shares		$ 17.01	$ 26.89	$ 48.35
Performance Share Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense \| $		$ 1	$ 3	$ 9
Stock-based compensation award vesting period		3 years
Shares issued upon conversion of equity award		1
Percentage of target award available for grant		100.00%	100.00%	100.00%
Weighted-average fair value at grant date (in dollars per share) \| $ / shares		$ 17.14	$ 44.38	$ 52.34
Number of additional shares to be awarded		1,100,000
Number of common stock shares reserved for issuance	7,000,000
Consecutive offering periods	12 months
Number of purchase periods in offer period \| Period	2
Employee stock purchase plan initial offering period	Oct. 02, 2017
Percentage of common stock discount rate equal to the fair value	95.00%
Stock purchased under employee stock purchase plan, Shares		226,000
Additional stock purchased under employee stock purchase plan, Shares				12,411
Stock purchased under employee stock purchase plan, Value \| $		$ 5
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]
Percentage of target award available for grant		250.00%
Chemours Company 2017 Equity and Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for grants (in shares)		10,200,000			0
Shares authorized for grants (in shares)					19,000,000
Chemours Company Equity and Incentive Plan (the "Prior Plan") [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued upon conversion of equity stock option awards granted					1
Shares issued upon conversion of equity stock other than option awards granted					1.5