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FAIR VALUE MEASUREMENT, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Liabilities under derivative contracts [Abstract]    
Impairment charges for goodwill, indefinite-lived cable television franchises, trademarks and other indefinite-lived intangible assets $ 0us-gaap_AssetImpairmentCharges  
Fair Value Measured on a Recurring Basis    
Assets:    
Money market funds 783,234,000cvc_MoneyMarketFundsFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
736,330,000cvc_MoneyMarketFundsFairValueDisclosure
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= us-gaap_FairValueMeasurementsRecurringMember
Investment securities 137,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
132,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Investment securities pledged as collateral 1,212,841,000cvc_InvestmentSecuritiesPledgedAsCollateralFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
1,245,916,000cvc_InvestmentSecuritiesPledgedAsCollateralFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Prepaid forward contracts 25,497,000cvc_PrepaidForwardContractsAssetFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
7,317,000cvc_PrepaidForwardContractsAssetFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Liabilities under derivative contracts [Abstract]    
Prepaid forward contracts 58,342,000cvc_PrepaidForwardContractsLiabilityFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
102,217,000cvc_PrepaidForwardContractsLiabilityFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measured on a Recurring Basis | Level I    
Assets:    
Money market funds 783,234,000cvc_MoneyMarketFundsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
736,330,000cvc_MoneyMarketFundsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Investment securities 137,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
132,000us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Investment securities pledged as collateral 1,212,841,000cvc_InvestmentSecuritiesPledgedAsCollateralFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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1,245,916,000cvc_InvestmentSecuritiesPledgedAsCollateralFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Prepaid forward contracts 0cvc_PrepaidForwardContractsAssetFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
0cvc_PrepaidForwardContractsAssetFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Liabilities under derivative contracts [Abstract]    
Prepaid forward contracts 0cvc_PrepaidForwardContractsLiabilityFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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0cvc_PrepaidForwardContractsLiabilityFairValueDisclosure
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= us-gaap_FairValueInputsLevel1Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Fair Value Measured on a Recurring Basis | Level II    
Assets:    
Money market funds 0cvc_MoneyMarketFundsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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0cvc_MoneyMarketFundsFairValueDisclosure
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= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Investment securities 0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
0us-gaap_InvestmentsFairValueDisclosure
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= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Investment securities pledged as collateral 0cvc_InvestmentSecuritiesPledgedAsCollateralFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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0cvc_InvestmentSecuritiesPledgedAsCollateralFairValueDisclosure
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= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Prepaid forward contracts 25,497,000cvc_PrepaidForwardContractsAssetFairValueDisclosure
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7,317,000cvc_PrepaidForwardContractsAssetFairValueDisclosure
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= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Liabilities under derivative contracts [Abstract]    
Prepaid forward contracts 58,342,000cvc_PrepaidForwardContractsLiabilityFairValueDisclosure
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= us-gaap_FairValueInputsLevel2Member
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102,217,000cvc_PrepaidForwardContractsLiabilityFairValueDisclosure
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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Fair Value Measured on a Recurring Basis | Level III    
Assets:    
Money market funds 0cvc_MoneyMarketFundsFairValueDisclosure
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0cvc_MoneyMarketFundsFairValueDisclosure
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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Investment securities 0us-gaap_InvestmentsFairValueDisclosure
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= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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0us-gaap_InvestmentsFairValueDisclosure
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Investment securities pledged as collateral 0cvc_InvestmentSecuritiesPledgedAsCollateralFairValueDisclosure
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= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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0cvc_InvestmentSecuritiesPledgedAsCollateralFairValueDisclosure
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= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
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Prepaid forward contracts 0cvc_PrepaidForwardContractsAssetFairValueDisclosure
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0cvc_PrepaidForwardContractsAssetFairValueDisclosure
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= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
Liabilities under derivative contracts [Abstract]    
Prepaid forward contracts $ 0cvc_PrepaidForwardContractsLiabilityFairValueDisclosure
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/ us-gaap_FairValueByMeasurementFrequencyAxis
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$ 0cvc_PrepaidForwardContractsLiabilityFairValueDisclosure
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