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Summary of Significant Accounting Policies (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Significant Accounting Policies      
Impairment of long-lived assets held-for-use $ 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse $ 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse $ 0us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Governmental imposed fees passed through to the customer 283,000,000chtr_GovernmentalAuthoritiesFees 263,000,000chtr_GovernmentalAuthoritiesFees 260,000,000chtr_GovernmentalAuthoritiesFees
Programming fee incentive 19,000,000chtr_ProgrammingFeeIncentives 7,000,000chtr_ProgrammingFeeIncentives 6,000,000chtr_ProgrammingFeeIncentives
Programming 2,459,000,000chtr_ProgrammingExpense 2,146,000,000chtr_ProgrammingExpense 1,965,000,000chtr_ProgrammingExpense
Advertising expense 380,000,000us-gaap_AdvertisingExpense 357,000,000us-gaap_AdvertisingExpense 325,000,000us-gaap_AdvertisingExpense
Stock compensation expense $ 55,000,000us-gaap_AllocatedShareBasedCompensationExpense $ 48,000,000us-gaap_AllocatedShareBasedCompensationExpense $ 50,000,000us-gaap_AllocatedShareBasedCompensationExpense
Risk free interest rate (percentage) 2.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 1.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 1.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Volatility rate (percentage) 36.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate 37.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate 38.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
Expected lives (in years) 6 years 6 months 6 years 4 months 6 years 4 months
Cost of equity (percentage)   16.20%chtr_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsCostOfEquityAwardsInterestRate 16.20%chtr_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsCostOfEquityAwardsInterestRate
Minimum [Member] | Cable distribution systems [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 7 years    
Minimum [Member] | Customer equipment and installations [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 3 years    
Minimum [Member] | Vehicles and equipment [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 3 years    
Minimum [Member] | Buildings and leashold improvements [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 15 years    
Minimum [Member] | Furniture, fixtures and equipment [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 6 years    
Maximum [Member] | Cable distribution systems [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 20 years    
Maximum [Member] | Customer equipment and installations [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 8 years    
Maximum [Member] | Vehicles and equipment [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 6 years    
Maximum [Member] | Buildings and leashold improvements [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 40 years    
Maximum [Member] | Furniture, fixtures and equipment [Member]      
Significant Accounting Policies      
Property, plant and equipment, useful life (in years) 10 years