Binding settlement agreement, class size

No definition available.

Name:	cc_BindingSettlementAgreementClassSize
Namespace Prefix:	cc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Cost of preparation of natural resource damage assessment plan and access to related documents.

+ References

No definition available.

+ Details

Name:	cc_CostOfPreparationOfNaturalResourceDamageAssessmentPlanAndAccessToRelatedDocuments
Namespace Prefix:	cc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Date of agreement month and year.

+ References

No definition available.

+ Details

Name:	cc_DateOfAgreementMonthAndYear
Namespace Prefix:	cc_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Escrow deposit disbursements.

+ References

No definition available.

+ Details

Name:	cc_EscrowDepositDisbursements
Namespace Prefix:	cc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Lawsuits alleging personal injury which have been filed.

+ References

No definition available.

+ Details

Name:	cc_LawsuitsAllegingPersonalInjuryFiled
Namespace Prefix:	cc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Loss contingency number of lawsuits pending.

+ References

No definition available.

+ Details

Name:	cc_LossContingencyNumberOfLawsuitsPending
Namespace Prefix:	cc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Loss contingency, number of water districts to provide treatment.

+ References

No definition available.

+ Details

Name:	cc_LossContingencyNumberOfWaterDistrictsToProvideTreatment
Namespace Prefix:	cc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of loss contingency lawsuits filed.

+ References

No definition available.

+ Details

Name:	cc_NumberOfLossContingencyLawsuitsFiled
Namespace Prefix:	cc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of water suppliers filed lawsuits.

+ References

No definition available.

+ Details

Name:	cc_NumberOfWaterSuppliersFiledLawsuits
Namespace Prefix:	cc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of payments.

+ References

No definition available.

+ Details

Name:	cc_PeriodOfPayments
Namespace Prefix:	cc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

+ Details

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of early contract termination fees included in liabilities subject to compromise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56145-112766

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=116635682&loc=d3e55717-112764

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6918054&loc=d3e56015-112765

+ Details

Name:	us-gaap_LiabilitiesSubjectToCompromiseEarlyContractTerminationFees
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

+ Details

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash outflow reducing loss contingency liability.

+ References

+ Details

Name:	us-gaap_LossContingencyAccrualPayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118943654&loc=d3e12021-110248

+ Details

Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyNumberOfPlaintiffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599

+ Details

Name:	us-gaap_NoncurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6787-107765

+ Details

Name:	us-gaap_OtherPrepaidExpenseCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	srt_ProductOrServiceAxis=cc_MiningSolutionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=cc_FundingForMedicalMonitoringProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=cc_MDLSettlementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=cc_PFOAMDLSettlementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=cc_BenzeneRelatedIllnessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=cc_PFOAMattersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=cc_PfoaMattersDrinkingWaterActionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=cc_PFOAMattersAdditionalActionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=cc_DuPontMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=cc_BusinessSeekingToRecoverLossesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=cc_ScheduledInJanuaryTwoThousandTwentyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=cc_ScheduledInJuneTwoThousandTwentyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=cc_AqueousFilmFormingFoamMattersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=us-gaap_AsbestosIssueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingent Liabilities - Litigation - Narrative (Details)		1 Months Ended		3 Months Ended	12 Months Ended
	May 23, 2017 USD ($)	Aug. 31, 2019 Supplier	Mar. 31, 2019 USD ($) lawsuit	Mar. 31, 2017 USD ($)	Dec. 31, 2019 USD ($) lawsuit water_district plaintiff	Dec. 31, 2004 resident	Sep. 30, 2019 lawsuit	Dec. 31, 2018 USD ($) lawsuit	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Accrual balance					$ 60,000,000			$ 64,000,000
Number of water suppliers filed lawsuits \| Supplier		8
Contract termination fees					26,000,000
Mining Solutions [Member]
Loss Contingencies [Line Items]
Long-lived assets					144,000,000
Goodwill					51,000,000
Other related prepaid costs					7,000,000
Maximum [Member]
Loss Contingencies [Line Items]
Loss contingency, potential additional loss									$ 530,000,000
Funding for medical monitoring program [Member]
Loss Contingencies [Line Items]
Escrow deposit disbursements					$ 1,700,000
MDL Settlement [Member]
Loss Contingencies [Line Items]
Date of agreement month and year					2017-03
Total settlement amount				$ 670,700,000
PFOA MDL Settlement [Member]
Loss Contingencies [Line Items]
Lawsuits alleging personal injury - Filed \| lawsuit					61
Settlement payments	$ 335,000,000
Benzene Related Illness [Member]
Loss Contingencies [Line Items]
Lawsuits alleging illness \| lawsuit					16			19
PFOA Matters [Member]
Loss Contingencies [Line Items]
Accrual balance					$ 20,000,000			$ 22,000,000
Number of lawsuits filed \| lawsuit			4
Cost of preparation of natural resource damage assessment plan and access to related documents			$ 100,000
PFOA Matters [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Settlement payments					$ 25,000,000
Period of payments					5 years
PFOA Matters: Drinking Water Actions [Member]
Loss Contingencies [Line Items]
Accrual balance					$ 20,000,000			$ 22,000,000
Binding settlement agreement, class size \| resident						80,000
Number of water districts Company must provide treatment \| water_district					6
PFOA Matters: Drinking Water Actions [Member] \| Funding for medical monitoring program [Member]
Loss Contingencies [Line Items]
Loss contingency, potential additional loss					$ 235,000,000
PFOA Matters: Additional Actions [Member]
Loss Contingencies [Line Items]
Lawsuits alleging personal injury - Filed \| lawsuit					3,500
DuPont [Member]
Loss Contingencies [Line Items]
Lawsuits alleging illness \| lawsuit					51
DuPont [Member] \| Maximum [Member]
Loss Contingencies [Line Items]
Settlement payments					$ 25,000,000
DuPont [Member] \| Business Seeking to Recover Losses [Member]
Loss Contingencies [Line Items]
Lawsuits alleging illness \| lawsuit					2
Scheduled In January 2020 [Member] \| PFOA MDL Settlement [Member]
Loss Contingencies [Line Items]
Number of individual plaintiffs \| plaintiff					2
Scheduled In June 2020 [Member] \| PFOA MDL Settlement [Member]
Loss Contingencies [Line Items]
Number of individual plaintiffs \| plaintiff					6
AFFF [Member]
Loss Contingencies [Line Items]
Number of lawsuits pending \| lawsuit					8
Number of lawsuits filed \| lawsuit							4
Asbestos Issue [Member]
Loss Contingencies [Line Items]
Lawsuits alleging personal injury - Filed \| lawsuit					1,100			1,300
Accrual balance					$ 34,000,000			$ 37,000,000