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Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Commitments and Contingencies [Line Items]      
Programming $ 2,459chtr_ProgrammingExpense $ 2,146chtr_ProgrammingExpense $ 1,965chtr_ProgrammingExpense
Franchise fees and other franchise-related costs 208us-gaap_FranchiseCosts 190us-gaap_FranchiseCosts 176us-gaap_FranchiseCosts
Letters of credit, amount 85us-gaap_LettersOfCreditOutstandingAmount    
Minimum [Member]      
Commitments and Contingencies [Line Items]      
Programming fee term (in years) 3 years    
Maximum [Member]      
Commitments and Contingencies [Line Items]      
Programming fee term (in years) 10 years    
Operating Leases and Rentals [Member]      
Commitments and Contingencies [Line Items]      
Lease and rental costs charged to expense 43us-gaap_LeaseAndRentalExpense
/ chtr_ContractualObligationAxis
= chtr_OperatingLeasesAndRentalsMember
34us-gaap_LeaseAndRentalExpense
/ chtr_ContractualObligationAxis
= chtr_OperatingLeasesAndRentalsMember
28us-gaap_LeaseAndRentalExpense
/ chtr_ContractualObligationAxis
= chtr_OperatingLeasesAndRentalsMember
Utility Pole Rental Agreement [Member]      
Commitments and Contingencies [Line Items]      
Lease and rental costs charged to expense 49us-gaap_LeaseAndRentalExpense
/ chtr_ContractualObligationAxis
= chtr_UtilityPoleRentalAgreementMember
49us-gaap_LeaseAndRentalExpense
/ chtr_ContractualObligationAxis
= chtr_UtilityPoleRentalAgreementMember
47us-gaap_LeaseAndRentalExpense
/ chtr_ContractualObligationAxis
= chtr_UtilityPoleRentalAgreementMember
Montana Department of Revenue [Member]      
Commitments and Contingencies [Line Items]      
Property Tax Assessment on Cable Companies (percentage) 3.00%chtr_PropertyTaxAssessmentonCableCompaniespercentage
/ chtr_BresnanCableLegalMattersAxis
= chtr_MontanaDepartmentofRevenueMember
   
Property Tax Assessment on Phone Companies (percentage) 6.00%chtr_PropertyTaxAssessmentonPhoneCompaniespercentage
/ chtr_BresnanCableLegalMattersAxis
= chtr_MontanaDepartmentofRevenueMember
   
Reduction in Bresnan acquisition liabilities 8chtr_ReductioninBresnanacquisitionliabilities
/ chtr_BresnanCableLegalMattersAxis
= chtr_MontanaDepartmentofRevenueMember
   
Reduction in expenses for post-acquisition settlements $ 3chtr_Reductioninexpensesforpostacquisitionsettlements
/ chtr_BresnanCableLegalMattersAxis
= chtr_MontanaDepartmentofRevenueMember