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Property, Plant, and Equipment, Net - Summary of Property, Plant, and Equipment, Net Parenthetical (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Discovery Hub [Member]
Property Plant And Equipment [Line Items]
Build To Suit Lease Asset	$ 95	$ 55

X

- Definition

Build to suit lease asset.

+ References

No definition available.

+ Details

Name:	cc_BuildToSuitLeaseAsset
Namespace Prefix:	cc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

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

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=cc_DiscoveryHubMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: