Senior debt carrying value.

No definition available.

Name:	cc_SeniorDebtCarryingValue
Namespace Prefix:	cc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Senior debt fair value.

+ References

No definition available.

+ Details

Name:	cc_SeniorDebtFairValue
Namespace Prefix:	cc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
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-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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

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

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
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+ Details

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

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

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-Topic 210
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than 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 S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Name Accounting Standards Codification
-Topic 944
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-Paragraph 1
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-Name Accounting Standards Codification
-Topic 942
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-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=cc_SeniorSecuredTrancheBTwoUSDollarTermLoanDueAprilTwoThousandTwentyFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=cc_SeniorSecuredTrancheBTwoEuroTermLoanDueAprilTwoThousandTwentyFiveMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=cc_SecuritizationFacilityMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cc_SeniorUnsecuredNotesSixPointSixTwoFiveDueMayTwoThousandTwentyThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cc_SeniorUnsecuredNotesSevenPointZeroZeroZeroDueMayTwoThousandTwentyFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cc_SeniorUnsecuredNotesFourPointZeroZeroZeroDueMayTwoThousandTwentySixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cc_SeniorUnsecuredNotesFivePointSevenFiveZeroDueNovemberTwoThousandTwentyEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=cc_SeniorUnsecuredNotesFivePointThreeSevenFiveDueMayTwoThousandTwentySevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Debt - Estimated Fair Values of Senior Debt Issues (Details) € in Millions, $ in Millions	Dec. 31, 2020 USD ($)	Dec. 31, 2020 EUR (€)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)
Debt Instrument [Line Items]
Less: Unamortized issue discounts	$ (7)		$ (8)
Less: Unamortized debt issuance costs	(28)		(28)
Senior Secured Tranche B-2 U.S Dollar Term Loan Due April 2025 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	875		884
Senior Secured Tranche B-2 Euro Term Loan Due April 2025 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	417	€ 340	383	€ 344
Securitization Facility [Member]
Debt Instrument [Line Items]
Short-term debt, Carrying Value			110
6.625% Senior Unsecured Notes Due May 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value			908
7.000% Senior Unsecured Notes Due May 2025 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	750		750
4.000% Senior Unsecured Notes Due May 2026 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	551	€ 450	501	€ 450
5.750% Senior Unsecured Notes Due November 2028 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	800
5.375% Senior Unsecured Notes Due May 2027 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	500		500
Level 2 [Member]
Debt Instrument [Line Items]
Total senior debt principal, Carrying Value	3,893		4,036
Total senior debt principal, Fair Value	3,957		3,930
Less: Unamortized issue discounts	(7)		(8)
Less: Unamortized debt issuance costs	(28)		(28)
Total senior debt, net	3,858		4,000
Level 2 [Member] \| Senior Secured Tranche B-2 U.S Dollar Term Loan Due April 2025 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	875		884
Long-term debt, Fair Value	862		865
Level 2 [Member] \| Senior Secured Tranche B-2 Euro Term Loan Due April 2025 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	417		383
Long-term debt, Fair Value	413		378
Level 2 [Member] \| Securitization Facility [Member]
Debt Instrument [Line Items]
Short-term debt, Carrying Value			110
Short-term debt, Fair Value			110
Level 2 [Member] \| 6.625% Senior Unsecured Notes Due May 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value			908
Long-term debt, Fair Value			917
Level 2 [Member] \| 7.000% Senior Unsecured Notes Due May 2025 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	750		750
Long-term debt, Fair Value	774		755
Level 2 [Member] \| 4.000% Senior Unsecured Notes Due May 2026 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	551		501
Long-term debt, Fair Value	551		455
Level 2 [Member] \| 5.750% Senior Unsecured Notes Due November 2028 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	800
Long-term debt, Fair Value	821
Level 2 [Member] \| 5.375% Senior Unsecured Notes Due May 2027 [Member]
Debt Instrument [Line Items]
Long-term debt, Carrying Value	500		500
Long-term debt, Fair Value	$ 536		$ 450