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v3.19.3.a.u2

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

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- 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

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- 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

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