DEBT - CSC Holdings Credit Facilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Principal amount	$ 25,126,605	$ 26,676,545
Gain (Loss) on Extinguishment of Debt	(4,393)	575	$ 51,712
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	4,393	(575)	(51,712)
Repayment of debt	2,688,009	4,469,727	4,870,108
CSC Holdings
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt	(4,393)	575	51,712
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	4,393	(575)	(51,712)
Repayment of debt	$ 2,688,009	4,469,727	$ 4,870,108
5.5% Notes due April 15, 2027 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount		1,310,000
Stated interest rate	5.50%
CSC Credit Facilities
Debt Instrument [Line Items]
Percentage of proceeds from asset sales required to pay down term loans	100.00%
Percentage of excess cash flow required when minimum leverage ratio is not met	50.00%
Percentage of excess cash flow required to pay down term loans when minimum leverage ratio is fulfilled	0.00%
Minimum debt leverage ratio required for zero percent of excess cash flow obligation to prepay debt	4.5
Line of credit facility, covenant, leverage ratio	5.0
Secured Debt [Member] | Synthetic LIBOR Rate (three months)
Debt Instrument [Line Items]
Basis spread on variable rate	0.26161%
Secured Debt [Member] | CSC Holdings Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Secured Debt [Member] | Incremental Term Loan B-3
Debt Instrument [Line Items]
Principal amount	$ 521,744	527,014
Secured Debt [Member] | Incremental Term Loan B-5
Debt Instrument [Line Items]
Principal amount	2,887,500	2,917,500
Secured Debt [Member] | CSC Holdings Term Loan B
Debt Instrument [Line Items]
Principal amount	1,520,483	1,535,842
Line of credit facility, periodic payment amount	3,840
Secured Debt [Member] | Incremental Term Loan B-6
Debt Instrument [Line Items]
Principal amount	1,986,928	2,001,942
Secured Debt [Member] | Cablevision Lightpath Term B Loan
Debt Instrument [Line Items]
Principal amount	$ 582,000	588,000		$ 600,000
Debt discount rate				99.50%
Secured Debt [Member] | Cablevision Lightpath Term B Loan | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%
Secured Debt [Member] | Cablevision Lightpath Term B Loan | Alternate base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Secured Debt [Member] | CSC Holdings Term Loan B-6
Debt Instrument [Line Items]
Line of credit facility, periodic payment amount	$ 5,005
Revolving Credit Facility | CSC Holdings Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	2,475,000
Principal amount	825,000	$ 1,575,000
Proceeds from long-term debt	1,700,000
Repayments of line of credit	2,450,000
Line of credit facility, remaining borrowing capacity	$ 1,516,488