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Contractual interest rate for funds borrowed, under the debt agreement.

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DEBT - Senior Guaranteed Notes, Senior Secured Notes, and Senior Notes and Debentures (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Debt Instrument [Line Items]
Principal amount	$ 26,456,208,000				$ 26,456,208,000		$ 26,671,018,000
Long-term debt	26,373,100,000				26,373,100,000		26,546,760,000
Gain (Loss) on Extinguishment of Debt	0		$ 51,712,000		0	$ 51,712,000
Stock Issued During Period, Value, New Issues	6,000	$ 10,000	$ 8,885,000	$ 2,044,000
Notes Payable that will be reclassed to collateralized debt upon maturity				$ 59,451,000
Supply chain financing to be paid within one year	$ 107,581,000				$ 107,581,000		89,898,000
Cablevision Lightpath LLC \| Cablevision Lightpath LLC
Debt Instrument [Line Items]
Ownership percentage of noncontrolling interest	50.01%				50.01%
Cablevision Lightpath Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount	$ 0				$ 0		0
Cablevision Lightpath Term B Loan \| Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	591,000,000				591,000,000		594,000,000
Line of Credit Facility, Maximum Borrowing Capacity	100,000,000				$ 100,000,000
Cablevision Lightpath Term B Loan \| Secured Debt [Member] \| Alternate Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					2.25%
Cablevision Lightpath Term B Loan \| Secured Debt [Member] \| Eurodollar
Debt Instrument [Line Items]
Basis spread on variable rate					3.25%
Senior Notes \| CSC Holdings 5.750% Notes due January 15, 2030
Debt Instrument [Line Items]
Principal amount	$ 2,250,000,000				$ 2,250,000,000		2,250,000,000
Stated interest rate	5.75%				5.75%
Senior Notes \| CSC Holdings 4.500% Senior Guaranteed Notes due November 15, 2021
Debt Instrument [Line Items]
Principal amount	$ 1,500,000,000				$ 1,500,000,000		1,500,000,000
Stated interest rate	4.50%				4.50%
Senior Notes \| CSC Holdings 5.000% Notes due November 15, 2031
Debt Instrument [Line Items]
Principal amount	$ 500,000,000				$ 500,000,000		500,000,000
Stated interest rate	5.00%				5.00%
Secured Debt [Member] \| 5.5% Notes due April 15, 2027
Debt Instrument [Line Items]
Principal amount	$ 1,310,000,000				$ 1,310,000,000		1,310,000,000
Stated interest rate	5.50%				5.50%
Long-term Debt
Debt Instrument [Line Items]
Principal amount	$ 23,725,682,000				$ 23,725,682,000		$ 25,739,991,000