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Leases - Build-to-suit Lease Obligation - Narrative (Details) - Discovery Hub [Member] $ in Millions | Dec. 31, 2019 USD ($) | Oct. 31, 2017 ft²
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Lessee Lease Description [Line Items] |  |
Build to suit lease area of land | ft² |  | 312,000
Build to suit lease liability reclassified as financing obligation | $ 95 |
Build to suit lease asset capitalized in property, plant and equipment | $ 95 |

X
- Definition Build to suit lease area of land. + References No definition available. + Details
Name: | cc_BuildToSuitLeaseAreaOfLand
Namespace Prefix: | cc_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Build to suit lease asset capitalized in property plant and equipment net. + References No definition available. + Details
Name: | cc_BuildToSuitLeaseAssetCapitalizedInPropertyPlantAndEquipmentNet
Namespace Prefix: | cc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Build to suit lease liability reclassified as financing obligation. + References No definition available. + Details
Name: | cc_BuildToSuitLeaseLiabilityReclassifiedAsFinancingObligation
Namespace Prefix: | cc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_LesseeLeaseDescriptionLineItems
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: |