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DEBT, Issuance of Debt Securities (Details) (USD $)
 12 Months Ended 1 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Sep. 30, 2014
May 31, 2014
Issuance of Debt Securities [Abstract]            
Repayments of credit facility debt $ 990,785,000us-gaap_RepaymentsOfBankDebt $ 3,445,751,000us-gaap_RepaymentsOfBankDebt $ 519,458,000us-gaap_RepaymentsOfBankDebt      
CSC Holdings, LLC            
Issuance of Debt Securities [Abstract]            
Repayments of credit facility debt 990,785,000us-gaap_RepaymentsOfBankDebt
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 3,445,751,000us-gaap_RepaymentsOfBankDebt
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		 519,458,000us-gaap_RepaymentsOfBankDebt
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		      
CSC Holdings, LLC | Term B-2 Extended Loan Facility            
Issuance of Debt Securities [Abstract]            
Pre-payment on credit facility       150,000,000us-gaap_RepaymentsOfLongTermLinesOfCredit
/ us-gaap_DebtInstrumentAxis
= cvc_TermB2ExtendedLoanFacilityMember
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember		    
Restricted Group | Term B Loan Facility            
Issuance of Debt Securities [Abstract]            
Repayments of credit facility debt         200,000,000us-gaap_RepaymentsOfBankDebt
/ us-gaap_DebtInstrumentAxis
= cvc_TermBLoanFacilityMember
/ dei_LegalEntityAxis
= cvc_RestrictedGroupMember		 750,000,000us-gaap_RepaymentsOfBankDebt
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= cvc_TermBLoanFacilityMember
/ dei_LegalEntityAxis
= cvc_RestrictedGroupMember
Senior Notes | CSC Holdings, LLC | Senior 5.25% Notes due June 1, 2024            
Issuance of Debt Securities [Abstract]            
Issue Amount 750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= cvc_DueJune12024Member
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 [1]         750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= cvc_DueJune12024Member
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
Redemption price, percentage of face value (in hundredths)           100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= cvc_DueJune12024Member
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
Interest rate (in hundredths) 5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= cvc_DueJune12024Member
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 [1]          
Deferred financing costs incurred           14,273,000us-gaap_DeferredFinanceCostsGross
/ us-gaap_DebtInstrumentAxis
= cvc_DueJune12024Member
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
Senior Notes | CSC Holdings, LLC | Senior 8.50% Notes due June 2015            
Issuance of Debt Securities [Abstract]            
Interest rate (in hundredths) 8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= cvc_DueJune152015Member
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= us-gaap_SubsidiariesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		          
Senior Notes | CSC Holdings, LLC | Senior 8.50% Notes due April 2014            
Issuance of Debt Securities [Abstract]            
Interest rate (in hundredths) 8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= cvc_DueApril152014Member
/ dei_LegalEntityAxis
= us-gaap_SubsidiariesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		          
Senior Notes | Cablevision Systems Corporation | Senior 5.875% Notes due September 2022            
Issuance of Debt Securities [Abstract]            
Issue Amount 750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= cvc_DueSeptember152022Member
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 [1]     750,000,000us-gaap_DebtInstrumentFaceAmount
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= cvc_DueSeptember152022Member
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		    
Redemption price, percentage of face value (in hundredths)       100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
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= cvc_DueSeptember152022Member
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		    
Net proceeds from issuance of debt       735,000,000us-gaap_ProceedsFromDebtNetOfIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= cvc_DueSeptember152022Member
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		    
Interest rate (in hundredths) 5.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= cvc_DueSeptember152022Member
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 [1]          
Deferred financing costs incurred       $ 16,195,000us-gaap_DeferredFinanceCostsGross
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= cvc_DueSeptember152022Member
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= us-gaap_ParentCompanyMember
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= us-gaap_SeniorNotesMember		    
[1] The Company may redeem some or all of the notes at any time at a specified "make-whole" price plus accrued and unpaid interest to the redemption date.