Guarantor Condensed Consolidating Financial Information - Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Cash (used for) provided by operating activities		$ 1,140	$ 640	$ 594
Cash flows from investing activities
Purchases of property, plant, and equipment		(498)	(411)	(338)
Acquisition of business, net		(37)	0	0
Proceeds from sales of assets and businesses, net	$ 39	46	39	708
Intercompany investing activities		0	0	0
Investments in affiliates		0	0	(1)
Foreign exchange contract settlements, net		2	2	(12)
Cash (used for) provided by investing activities		(487)	(370)	357
Cash flows from financing activities
Intercompany short-term borrowings, net			0	0
Proceeds from issuance of debt, net		520	495	0
Debt repayments		(679)	(27)	(381)
Payments related to extinguishment of debt		(29)	(1)	0
Payments of debt issuance costs		(12)	(6)	(4)
Purchases of treasury stock, at cost		(644)	(106)	0
Intercompany financing activities		0
Proceeds from exercised stock options, net		16	31	11
Payments related to tax withholdings on vested restricted stock units		(17)	(12)	0
Payments of dividends		(148)	(22)	(22)
Cash (used for) provided by financing activities		(993)	352	(396)
Effect of exchange rate changes on cash and cash equivalents		(15)	32	(19)
(Decrease) increase in cash and cash equivalents		(355)	654	536
Cash and cash equivalents at January 1,		1,556	902	366
Cash and cash equivalents at December 31,		1,201	1,556	902
Eliminations and Adjustments [Member]
Cash flows from operating activities
Cash (used for) provided by operating activities		0	0	0
Cash flows from investing activities
Purchases of property, plant, and equipment		0	0	0
Acquisition of business, net		0
Proceeds from sales of assets and businesses, net		0	0	0
Intercompany investing activities		1,152	(220)	560
Investments in affiliates				0
Foreign exchange contract settlements, net		0	0	0
Cash (used for) provided by investing activities		1,152	(220)	560
Cash flows from financing activities
Intercompany short-term borrowings, net			220	(560)
Proceeds from issuance of debt, net		0	0
Debt repayments		0	0	0
Payments related to extinguishment of debt		0	0
Payments of debt issuance costs		0	0	0
Purchases of treasury stock, at cost		0	0
Intercompany financing activities		(1,152)
Proceeds from exercised stock options, net		0	0	0
Payments related to tax withholdings on vested restricted stock units		0	0
Payments of dividends		0	0	0
Cash (used for) provided by financing activities		(1,152)	220	(560)
Effect of exchange rate changes on cash and cash equivalents		0	0	0
(Decrease) increase in cash and cash equivalents		0	0	0
Cash and cash equivalents at January 1,		0	0	0
Cash and cash equivalents at December 31,		0	0	0
Parent Issuer [Member] \| Reportable Legal Entities [Member]
Cash flows from operating activities
Cash (used for) provided by operating activities		(159)	(132)	(176)
Cash flows from investing activities
Purchases of property, plant, and equipment		0	0	0
Acquisition of business, net		0
Proceeds from sales of assets and businesses, net		0	0	0
Intercompany investing activities		0	0	0
Investments in affiliates				0
Foreign exchange contract settlements, net		0	0	0
Cash (used for) provided by investing activities		0	0	0
Cash flows from financing activities
Intercompany short-term borrowings, net			(220)	560
Proceeds from issuance of debt, net		520	495
Debt repayments		(679)	(27)	(369)
Payments related to extinguishment of debt		(29)	(1)
Payments of debt issuance costs		(12)	(6)	(4)
Purchases of treasury stock, at cost		(644)	(106)
Intercompany financing activities		1,152
Proceeds from exercised stock options, net		16	31	11
Payments related to tax withholdings on vested restricted stock units		(17)	(12)
Payments of dividends		(148)	(22)	(22)
Cash (used for) provided by financing activities		159	132	176
Effect of exchange rate changes on cash and cash equivalents		0	0	0
(Decrease) increase in cash and cash equivalents		0	0	0
Cash and cash equivalents at January 1,		0	0	0
Cash and cash equivalents at December 31,		0	0	0
Guarantor Subsidiaries [Member] \| Reportable Legal Entities [Member]
Cash flows from operating activities
Cash (used for) provided by operating activities		10	603	355
Cash flows from investing activities
Purchases of property, plant, and equipment		(390)	(327)	(233)
Acquisition of business, net		(37)
Proceeds from sales of assets and businesses, net		46	39	591
Intercompany investing activities		(153)	220	(560)
Investments in affiliates				0
Foreign exchange contract settlements, net		2	2	(12)
Cash (used for) provided by investing activities		(532)	(66)	(214)
Cash flows from financing activities
Intercompany short-term borrowings, net			0	0
Proceeds from issuance of debt, net		0	0
Debt repayments		0	0	(12)
Payments related to extinguishment of debt		0	0
Payments of debt issuance costs		0	0	0
Purchases of treasury stock, at cost		0	0
Intercompany financing activities		0
Proceeds from exercised stock options, net		0	0	0
Payments related to tax withholdings on vested restricted stock units		0	0
Payments of dividends		0	0	0
Cash (used for) provided by financing activities		0	0	(12)
Effect of exchange rate changes on cash and cash equivalents		0	0	0
(Decrease) increase in cash and cash equivalents		(522)	537	129
Cash and cash equivalents at January 1,		761	224	95
Cash and cash equivalents at December 31,		239	761	224
Non-Guarantor Subsidiaries [Member] \| Reportable Legal Entities [Member]
Cash flows from operating activities
Cash (used for) provided by operating activities		1,289	169	415
Cash flows from investing activities
Purchases of property, plant, and equipment		(108)	(84)	(105)
Acquisition of business, net		0
Proceeds from sales of assets and businesses, net		0	0	117
Intercompany investing activities		(999)	0	0
Investments in affiliates				(1)
Foreign exchange contract settlements, net		0	0	0
Cash (used for) provided by investing activities		(1,107)	(84)	11
Cash flows from financing activities
Intercompany short-term borrowings, net			0	0
Proceeds from issuance of debt, net		0	0
Debt repayments		0	0	0
Payments related to extinguishment of debt		0	0
Payments of debt issuance costs		0	0	0
Purchases of treasury stock, at cost		0	0
Intercompany financing activities		0
Proceeds from exercised stock options, net		0	0	0
Payments related to tax withholdings on vested restricted stock units		0	0
Payments of dividends		0	0	0
Cash (used for) provided by financing activities		0	0	0
Effect of exchange rate changes on cash and cash equivalents		(15)	32	(19)
(Decrease) increase in cash and cash equivalents		167	117	407
Cash and cash equivalents at January 1,		795	678	271
Cash and cash equivalents at December 31,		$ 962	$ 795	$ 678

Payments for proceeds from intercompany financing activities.

No definition available.

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

- Definition

Payments for (Proceeds from) Intercompany Investing Activities

+ References

No definition available.

+ Details

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

- Definition

Payments for (Proceeds from) Intercompany Short-term Borrowings

+ References

No definition available.

+ Details

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

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.

+ References

No definition available.

+ Details

Name:	us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 230
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906

+ Details

Name:	us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585

+ Details

Name:	us-gaap_NetCashProvidedByUsedInFinancingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

+ References

+ Details

Name:	us-gaap_NetCashProvidedByUsedInInvestingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

+ Details

Name:	us-gaap_NetCashProvidedByUsedInOperatingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

The net cash outflow or inflow from derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

+ Details

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

- Definition

The cash outflow to reacquire common stock during the period.

+ References

+ Details

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

- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

+ Details

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

- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

+ Details

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

- Definition

Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

+ References

+ Details

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

- Definition

Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 25
-Paragraph 19A
-URI http://asc.fasb.org/extlink&oid=107668666&loc=SL79513924-113897

+ Details

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

- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

+ Details

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

- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

+ Details

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

- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

+ Details

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

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=SL79508275-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromStockOptionsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

+ Details

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

- Details

Name:	srt_ConsolidationItemsAxis=srt_ConsolidationEliminationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=srt_ReportableLegalEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_GuarantorSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_NonGuarantorSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: