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Document And Entity Information (USD $)	6 Months Ended		6 Months Ended
Document And Entity Information (USD $)	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2010 CSC Holdings, LLC [Member]	Aug. 05, 2011 CSC Holdings, LLC [Member]	Aug. 05, 2011 CNYG Class A Common Stock [Member]	Aug. 05, 2011 CNYG Class B Common Stock [Member]
Entity Information [Line Items]
Entity Registrant Name	CABLEVISION SYSTEMS CORP /NY		CSC HOLDINGS LLC
Entity Central Index Key	0001053112		0000784681
Current Fiscal Year End Date	--12-31		--12-31
Entity Well-known Seasoned Issuer	No		No
Entity Voluntary Filers	No		No
Entity Current Reporting Status	Yes		Yes
Entity Filer Category	Large Accelerated Filer		Non-accelerated Filer
Entity Public Float		$ 5,779,402,596
Entity Common Stock, Shares Outstanding				14,432,750	230,682,904	54,137,673
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2011