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Income Taxes - Deferred tax assets and liabilities (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Components of Deferred Tax Assets and Liabilities [Abstract]    
Goodwill $ 251chtr_DeferredTaxAssetGoodwill $ 274chtr_DeferredTaxAssetGoodwill
Investment in partnership 293us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries 289us-gaap_DeferredTaxAssetsInvestmentInSubsidiaries
Loss carryforwards 3,595us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 3,170us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Other intangibles 112chtr_DeferredTaxAssetOtherIntangibles 48chtr_DeferredTaxAssetOtherIntangibles
Accrued and other 172us-gaap_DeferredTaxAssetsOther 112us-gaap_DeferredTaxAssetsOther
Total gross deferred tax assets 4,423us-gaap_DeferredTaxAssetsGross 3,893us-gaap_DeferredTaxAssetsGross
Less: valuation allowance (3,149)us-gaap_DeferredTaxAssetsValuationAllowance (2,961)us-gaap_DeferredTaxAssetsValuationAllowance
Deferred tax assets 1,274us-gaap_DeferredTaxAssetsNet 932us-gaap_DeferredTaxAssetsNet
Indefinite life intangibles (1,428)chtr_DeferredTaxLiabilitiesIndefiniteLifeIntangibles (1,205)chtr_DeferredTaxLiabilitiesIndefiniteLifeIntangibles
Property, plant and equipment (1,247)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (901)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Deferred tax liabilities (2,922)us-gaap_DeferredIncomeTaxLiabilities (2,347)us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax liabilities (1,648)us-gaap_DeferredTaxLiabilities (1,415)us-gaap_DeferredTaxLiabilities
Indirect corporate subsidiaries [Member]    
Components of Deferred Tax Assets and Liabilities [Abstract]    
Indefinite life intangibles (122)chtr_DeferredTaxLiabilitiesIndefiniteLifeIntangibles
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
(122)chtr_DeferredTaxLiabilitiesIndefiniteLifeIntangibles
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
Other $ (125)us-gaap_DeferredTaxLiabilitiesOther
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
$ (119)us-gaap_DeferredTaxLiabilitiesOther
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember