SUPPLEMENTAL CASH FLOW INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Non-Cash Investing and Financing Activities - Continuing Operations [Abstract]
Property and equipment accrued but unpaid	$ 48,824	$ 65,391	$ 93,760
Capital lease obligations	30,603us-gaap_CapitalLeaseObligationsIncurred	11,499us-gaap_CapitalLeaseObligationsIncurred	27,535us-gaap_CapitalLeaseObligationsIncurred
Intangible asset obligations	525	2,498	1,435
Notes payable to vendor	34,522us-gaap_NotesIssued1	1,202us-gaap_NotesIssued1	0us-gaap_NotesIssued1
Reduction in capital lease obligation as a result of not exercising a bargain purchase option	0cvc_ReductionInCapitalLeaseObligation	22,950cvc_ReductionInCapitalLeaseObligation	0cvc_ReductionInCapitalLeaseObligation
Supplemental Data [Abstract]
Cash interest paid - continuing operations	550,241us-gaap_InterestPaid	580,906us-gaap_InterestPaid	646,346us-gaap_InterestPaid
Income taxes paid, net - continuing operations	10,598us-gaap_IncomeTaxesPaidNet	16,470us-gaap_IncomeTaxesPaidNet	13,418us-gaap_IncomeTaxesPaidNet
Cash interest paid - discontinued operations	0	26,606	61,927
Restricted Stock
Non-Cash Investing and Financing Activities - Continuing Operations [Abstract]
Dividends payable on unvested restricted share awards	3,809	3,466	3,119
CSC Holdings, LLC
Non-Cash Investing and Financing Activities - Continuing Operations [Abstract]
Property and equipment accrued but unpaid	48,824	65,391	93,760
Capital lease obligations	30,603	11,499	27,535
Intangible asset obligations	525	2,498	1,435
Notes payable to vendor	34,522	1,202	0
Reduction in capital lease obligation as a result of not exercising a bargain purchase option	0	22,950	0
Distribution of Cablevision senior notes to Cablevision	0	142,262	0
Supplemental Data [Abstract]
Cash interest paid - continuing operations	335,175	362,365	469,502
Income taxes paid, net - continuing operations	10,598	16,470	13,437
Cash interest paid - discontinued operations	$ 0	$ 26,606	$ 61,927

Distribution of Cablevision senior notes by CSC Holdings to Cablevision.

No definition available.

Name:	cvc_DistributionOfSeniorNotes
Namespace Prefix:	cvc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of dividends declared but not paid during the period on unvested restricted share awards.

+ References

No definition available.

+ Details

Name:	cvc_DividendsPayableOnUnvestedRestrictedShareAwards
Namespace Prefix:	cvc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The decrease during the period in capital lease obligation as a result of not exercising a bargain purchase option.

+ References

No definition available.

+ Details

Name:	cvc_ReductionInCapitalLeaseObligation
Namespace Prefix:	cvc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Future cash outflow to pay for purchases of fixed assets that have occurred.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

Name:	us-gaap_CapitalExpendituresIncurredButNotYetPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The increase during the period in capital lease obligations due to entering into new capital leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

Name:	us-gaap_CapitalLeaseObligationsIncurred
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

+ References

+ Details

Name:	us-gaap_IncomeTaxesPaidNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of cash paid for interest during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

+ Details

Name:	us-gaap_InterestPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of cash paid during the current period for interest owed on debt associated with discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 24

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585

+ Details

Name:	us-gaap_InterestPaidDiscontinuedOperations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of intangibles that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

+ Details

Name:	us-gaap_NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The fair value of notes issued in noncash investing and financing activities.

+ References

+ Details

Name:	us-gaap_NotesIssued1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=us-gaap_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: