DEBT - Senior Guaranteed Notes and Senior Notes and Debentures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Principal amount	$ 25,096,412	$ 25,126,605
Face Amount of Senior Debt and Senior Secured Debt	10,710,000	8,660,000
Carrying amount of Senior Debt and Senior Secured Debt	10,673,478	8,635,472
Face amount of Credit Facility Debt	6,524,408	7,741,655
Carrying value of Credit Facility Debt	6,483,882	7,685,784
Finance Lease, Liability	145,362	228,356
Long-term debt	25,057,488	25,074,961
Long-Term Debt, Current Maturities	185,473	359,407
Finance Lease, Liability, Current	77,770	123,636
Long-term debt, net of current maturities	24,872,015	24,715,554
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	(12,901)	4,393	$ (575)
Loans Payable
Debt Instrument [Line Items]
Principal amount	50,642	174,594
Long-term debt	50,642	174,594
Short-term Debt
Debt Instrument [Line Items]
Principal amount	185,473	359,407
Long-Term Debt, Current Maturities	185,473	359,407
Credit Facility [Domain]
Debt Instrument [Line Items]
Long-Term Debt, Current Maturities	$ 57,061	61,177
5.25% Notes due June 1, 2024
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.25%
Incremental Term Loan B-3 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 0	521,744
Credit facility	0	520,988
Incremental Term Loan B-5 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 2,857,500	2,887,500
Stated interest rate	7.174%
Credit facility	$ 2,849,460	2,876,131
Loans Payable
Debt Instrument [Line Items]
Principal amount	50,642	174,454	$ 123,880
CSC Holdings Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount	$ 1,700,000	825,000
Stated interest rate	6.747%
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,475,000
Credit facility	1,697,559	821,632
Repayments of line of credit	$ 1,150,000
Secured Debt [Member] | 5.5% Notes due April 15, 2027
Debt Instrument [Line Items]
Principal amount		1,310,000
Debt Instrument, Interest Rate, Stated Percentage	5.50%
Carrying Amount	$ 1,308,363	1,307,709
Secured Debt [Member] | 5.375% Senior Guaranteed Notes Due February 1, 2028
Debt Instrument [Line Items]
Principal amount		1,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.375%
Carrying Amount	$ 996,853	995,940
Secured Debt [Member] | CSC Holdings 6.500% Notes due February 1, 2029
Debt Instrument [Line Items]
Principal amount		1,750,000
Debt Instrument, Interest Rate, Stated Percentage	6.50%
Carrying Amount	$ 1,748,423	1,748,098
Long-term Debt
Debt Instrument [Line Items]
Principal amount	24,910,939	24,767,198
Long-term debt, net of current maturities	24,872,015	24,715,554
Senior Notes | 5.25% Notes due June 1, 2024
Debt Instrument [Line Items]
Principal amount	750,000
Carrying Amount	742,746
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	(4,437)
Senior Notes | CSC Holdings 7.500% Notes due April 1, 2028
Debt Instrument [Line Items]
Principal amount	$ 1,045,882
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Carrying Amount	$ 1,045,130	1,044,933
Senior Notes | Cablevision 7.500% Notes due April 1, 2028
Debt Instrument [Line Items]
Principal amount	$ 4,118
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Carrying Amount	$ 4,115	4,114
Senior Notes | CSC Holdings 5.750% Notes due January 15, 2030
Debt Instrument [Line Items]
Principal amount	$ 2,250,000
Debt Instrument, Interest Rate, Stated Percentage	5.75%
Carrying Amount	$ 2,272,150	$ 2,275,915