DEBT - Credit Silo Combination (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020
Debt Instrument [Line Items]
Principal amount	$ 25,126,605	$ 26,676,545
Long-term debt	25,074,961	26,587,733
Face Amount of Senior Debt and Senior Secured Debt	8,660,000	7,660,000
Carrying amount of Senior Debt and Senior Secured Debt	8,635,472	7,638,443
Face amount of Credit Facility Debt	7,741,655	8,557,298
Carrying value of Credit Facility Debt	7,685,784	8,488,017
Finance Lease, Liability	228,356	244,595
Long-Term Debt, Current Maturities	(359,407)	(2,075,077)
Finance Lease, Liability, Current	123,636	129,657
Long-term debt, net of current maturities	24,715,554	24,512,656
Principal Amount	25,126,605	26,676,545
Carrying amount of Senior Notes	6,925,311	6,916,148
Face Amount of Senior Notes	6,875,000	6,875,000
Cablevision Lightpath
Debt Instrument [Line Items]
Face Amount of Senior Debt and Senior Secured Debt	1,447,000	1,453,000
Carrying amount of Senior Debt and Senior Secured Debt	1,425,444	1,426,614
Credit Facility [Domain]
Debt Instrument [Line Items]
Long-Term Debt, Current Maturities	(61,177)	(71,643)
Loans Payable
Debt Instrument [Line Items]
Principal amount	174,594	127,496
Long-term debt	174,594	127,496
Principal Amount	174,594	127,496
Short-term Debt
Debt Instrument [Line Items]
Principal amount	359,407	2,087,813
Long-Term Debt, Current Maturities	(359,407)	(2,075,077)
Principal Amount	359,407	2,087,813
Collateralized Debt Obligations [Member]
Debt Instrument [Line Items]
Principal amount	0	1,759,017
Debt Instrument, Collateral Amount	0	(1,746,281)
Principal Amount	0	1,759,017
Incremental Term Loan B-3 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 521,744	527,014
Stated interest rate	7.726%
Credit facility	$ 520,988	525,883
Principal Amount	521,744	527,014
CSC Holdings Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount	$ 825,000	1,575,000
Stated interest rate	7.712%
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,475,000
Credit facility	821,632	1,570,730
Principal Amount	825,000	1,575,000
CSC Holdings Term Loan B | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 1,520,483	1,535,842
Stated interest rate	7.726%
Credit facility	$ 1,518,530	1,532,644
Principal Amount	1,520,483	1,535,842
Line of credit facility, periodic payment amount	3,840
Incremental Term Loan B-5 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 2,887,500	2,917,500
Stated interest rate	7.976%
Credit facility	$ 2,876,131	2,902,921
Principal Amount	2,887,500	2,917,500
Loans Payable
Debt Instrument [Line Items]
Principal amount	174,454	123,880
Principal Amount	174,454	123,880
Cablevision Lightpath Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount	0
Line of Credit Facility, Maximum Borrowing Capacity	100,000
Credit facility	0
Principal Amount	0
Cablevision Lightpath Term B Loan | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 582,000	588,000	$ 600,000
Stated interest rate	8.726%
Credit facility	$ 571,898	575,478
Principal Amount	582,000	588,000	$ 600,000
Incremental Term Loan B-6 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 1,986,928	2,001,942
Stated interest rate	9.862%
Credit facility	$ 1,948,503	1,955,839
Principal Amount	1,986,928	2,001,942
Collateralized Debt Obligations [Member]
Debt Instrument [Line Items]
Principal amount	0	1,759,017
Long-term debt	0	1,746,281
Principal Amount	0	1,759,017
Notes Payable and Supply Chain Financing
Debt Instrument [Line Items]
Principal amount	174,594	127,635
Long-term debt	174,594	127,635
Principal Amount	174,594	127,635
Senior Notes | 5.25% Notes due June 1, 2024
Debt Instrument [Line Items]
Principal amount	$ 750,000
Stated interest rate	5.25%
Outstanding debt	$ 726,343
Principal Amount	750,000
Senior Notes | Cablevision 7.500% Notes due April 1, 2028
Debt Instrument [Line Items]
Principal amount	$ 4,118
Stated interest rate	7.50%
Outstanding debt	$ 4,114	4,113
Principal Amount	4,118
Senior Notes | CSC Holdings 7.500% Notes due April 1, 2028
Debt Instrument [Line Items]
Principal amount	$ 1,045,882
Stated interest rate	7.50%
Outstanding debt	$ 1,044,933	1,044,752
Principal Amount	1,045,882
Senior Notes | CSC Holdings 5.750% Notes due January 15, 2030
Debt Instrument [Line Items]
Principal amount	$ 2,250,000
Stated interest rate	5.75%
Outstanding debt	$ 2,275,915	2,279,483
Principal Amount	2,250,000
Senior Notes | CSC Holdings 4.625% Notes due December 1, 2030
Debt Instrument [Line Items]
Principal amount	$ 2,325,000
Stated interest rate	4.625%
Outstanding debt	$ 2,359,078	2,363,082
Principal Amount	$ 2,325,000
Senior Notes | Cablevision Lightpath LLC 5.625% Notes due September 15, 2028
Debt Instrument [Line Items]
Principal amount		415,000
Stated interest rate	5.625%
Outstanding debt	$ 409,136	408,090
Principal Amount		415,000
Senior Notes | CSC Holdings 5.000% Notes due November 15, 2031
Debt Instrument [Line Items]
Principal amount	$ 500,000
Stated interest rate	5.00%
Outstanding debt	$ 498,525	498,375
Principal Amount	$ 500,000
Secured Debt [Member] | 5.5% Notes due April 15, 2027
Debt Instrument [Line Items]
Principal amount		1,310,000
Stated interest rate	5.50%
Outstanding debt	$ 1,307,709	1,307,091
Principal Amount		1,310,000
Secured Debt [Member] | 5.375% Senior Guaranteed Notes Due February 1, 2028
Debt Instrument [Line Items]
Principal amount		1,000,000
Stated interest rate	5.375%
Outstanding debt	$ 995,940	995,078
Principal Amount		1,000,000
Secured Debt [Member] | CSC Holdings 6.500% Notes due February 1, 2029
Debt Instrument [Line Items]
Principal amount		1,750,000
Stated interest rate	6.50%
Outstanding debt	$ 1,748,098	1,747,795
Principal Amount		1,750,000
Secured Debt [Member] | CSC Holdings 4.125% Notes due December 1, 2030
Debt Instrument [Line Items]
Principal amount		1,100,000
Stated interest rate	4.125%
Outstanding debt	$ 1,096,499	1,096,077
Principal Amount		1,100,000
Secured Debt [Member] | CSC Holdings 3.375% Notes due February 15, 2031
Debt Instrument [Line Items]
Principal amount		1,000,000
Stated interest rate	3.375%
Outstanding debt	$ 997,556	997,258
Principal Amount		1,000,000
Secured Debt [Member] | Cablevision Lightpath LLC 3.875% Notes due September 15, 2027
Debt Instrument [Line Items]
Principal amount		450,000
Stated interest rate	3.875%
Outstanding debt	$ 444,410	443,046
Principal Amount		450,000
Secured Debt [Member] | CSC Holdings 4.500% Senior Guaranteed Notes due November 15, 2031
Debt Instrument [Line Items]
Principal amount		1,500,000
Stated interest rate	4.50%
Outstanding debt	$ 1,495,598	1,495,144
Principal Amount		1,500,000
Secured Debt [Member] | CSC Holdings 11.250% Senior Guaranteed Notes due May 15, 2028
Debt Instrument [Line Items]
Principal amount	$ 1,000,000	0
Stated interest rate	11.25%
Outstanding debt	$ 994,072	0
Principal Amount	1,000,000	0
Long-term Debt
Debt Instrument [Line Items]
Principal amount	24,767,198	24,588,732
Long-term debt, net of current maturities	24,715,554	24,512,656
Principal Amount	$ 24,767,198	$ 24,588,732