DEBT - Senior Guaranteed Notes, Senior Secured Notes, and Senior Notes and Debentures (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Apr. 25, 2023
Debt Instrument [Line Items]
Principal amount	$ 25,126,605,000	$ 26,676,545,000
Repayments of Debt	(2,688,009,000)	(4,469,727,000)	$ (4,870,108,000)
Gain (Loss) on Extinguishment of Debt	(4,393,000)	575,000	$ 51,712,000
Supply chain financing arrangement credit limit	$ 175,000,000
Secured Debt [Member] | Synthetic LIBOR Rate (one month)
Debt Instrument [Line Items]
Basis spread on variable rate	0.11448%
Secured Debt [Member] | Synthetic LIBOR Rate (three months)
Debt Instrument [Line Items]
Basis spread on variable rate	0.26161%
Secured Debt [Member] | Synthetic LIBOR Rate (six months)
Debt Instrument [Line Items]
Basis spread on variable rate	0.42826%
CSC Holdings Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount	$ 825,000,000	1,575,000,000
Line of Credit Facility, Maximum Borrowing Capacity	2,475,000,000
Line of credit facility, remaining borrowing capacity	1,516,488,000
Credit facility	$ 821,632,000	1,570,730,000
CSC Holdings Revolving Credit Facility | Secured Debt [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Cablevision Lightpath Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount	$ 0
Line of Credit Facility, Maximum Borrowing Capacity	100,000,000
Credit facility	0
Incremental Term Loan B-3 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	521,744,000	527,014,000
Credit facility	$ 520,988,000	525,883,000
Cablevision Lightpath Term B Loan
Debt Instrument [Line Items]
Senior Debt Covenant, Leverage Ratio	6.75
Incurrence Test	4.75
Cablevision Lightpath Term B Loan | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 582,000,000	588,000,000		$ 600,000,000
Line of Credit Facility, Periodic Payment	1,500,000
Credit facility	$ 571,898,000	575,478,000
Debt discount rate				99.50%
Cablevision Lightpath Term B Loan | Secured Debt [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%
Cablevision Lightpath Term B Loan | Secured Debt [Member] | Synthetic LIBOR Rate (one month)
Debt Instrument [Line Items]
Basis spread on variable rate	0.11448%
Cablevision Lightpath Term B Loan | Secured Debt [Member] | Synthetic LIBOR Rate (six months)
Debt Instrument [Line Items]
Basis spread on variable rate	0.42826%
Cablevision Lightpath Term B Loan | Secured Debt [Member] | Alternate base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Incremental Term Loan B-5 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 2,887,500,000	2,917,500,000
Credit facility	2,876,131,000	2,902,921,000
Incremental Term Loan B-6 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	1,986,928,000	2,001,942,000
Credit facility	$ 1,948,503,000	1,955,839,000
Revolving Credit Facility | Secured Debt [Member] | Credit Adjustment Spread
Debt Instrument [Line Items]
Basis spread on variable rate	0.10%
CSC Holdings Term B-5 | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, periodic payment amount	$ 7,500,000
CSC Holdings Term B-5 | Secured Debt [Member] | libor
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
CSC Holdings Term Loan B | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 1,520,483,000	1,535,842,000
Line of credit facility, periodic payment amount	3,840,000
Credit facility	$ 1,518,530,000	1,532,644,000
CSC Holdings Term Loan B | Secured Debt [Member] | libor
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
CSC Holdings Term Loan B-3 | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, periodic payment amount	$ 1,318,000
CSC Holdings Term Loan B-3 | Secured Debt [Member] | libor
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
CSC Holdings Term Loan B-6 | Secured Debt [Member]
Debt Instrument [Line Items]
Line of credit facility, periodic payment amount	$ 5,005,000
CSC Credit Facilities
Debt Instrument [Line Items]
Line of credit facility, covenant, leverage ratio	5.0
Loans Payable
Debt Instrument [Line Items]
Principal amount	$ 174,454,000	123,880,000
Proceeds from Loans	213,325,000
Repayments of Debt	(162,751,000)
Senior Notes | CSC Holdings 5.750% Notes due January 15, 2030
Debt Instrument [Line Items]
Principal amount	$ 2,250,000,000
Stated interest rate	5.75%
Senior Notes | CSC Holdings 4.625% Notes due December 1, 2030
Debt Instrument [Line Items]
Principal amount	$ 2,325,000,000
Stated interest rate	4.625%
Senior Notes | Cablevision Lightpath LLC 5.625% Notes due September 15, 2028
Debt Instrument [Line Items]
Principal amount		415,000,000
Stated interest rate	5.625%
Senior Notes | Cablevision 7.500% Notes due April 1, 2028
Debt Instrument [Line Items]
Principal amount	$ 4,118,000
Stated interest rate	7.50%
Senior Notes | CSC Holdings 5.000% Notes due November 15, 2031
Debt Instrument [Line Items]
Principal amount	$ 500,000,000
Stated interest rate	5.00%
Senior Notes | CSC Holdings 11.2500% Senior Guaranteed Notes due May 15, 2028
Debt Instrument [Line Items]
Principal amount					$ 1,000,000,000
Stated interest rate					11.25%
Secured Debt [Member] | 5.5% Notes due April 15, 2027
Debt Instrument [Line Items]
Principal amount		1,310,000,000
Stated interest rate	5.50%
Secured Debt [Member] | CSC Holdings 4.125% Notes due December 1, 2030
Debt Instrument [Line Items]
Principal amount		1,100,000,000
Stated interest rate	4.125%
Secured Debt [Member] | CSC Holdings 3.375% Notes due February 15, 2031
Debt Instrument [Line Items]
Principal amount		1,000,000,000
Stated interest rate	3.375%
Secured Debt [Member] | Cablevision Lightpath LLC 3.875% Notes due September 15, 2027
Debt Instrument [Line Items]
Principal amount		450,000,000
Stated interest rate	3.875%
Secured Debt [Member] | CSC Holdings 4.500% Senior Guaranteed Notes due November 15, 2031
Debt Instrument [Line Items]
Principal amount		1,500,000,000
Stated interest rate	4.50%
Long-term Debt
Debt Instrument [Line Items]
Principal amount	$ 24,767,198,000	$ 24,588,732,000