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Other Liabilities - Schedule of Other Liabilities (Parenthetical) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Liabilities Noncurrent [Abstract]
Accrued indemnification liability	$ 37	$ 41

X

- Definition

Accrued indemnification liability.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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