DEBT - Senior Guaranteed Notes and Senior Notes and Debentures (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Debt Instrument [Line Items]
Principal amount	$ 25,066,345,000		$ 26,676,545,000
Face Amount of Senior Notes and Senior Guaranteed Notes	7,660,000,000		7,660,000,000
Carrying amount of Senior Notes and Senior Guaranteed Notes	7,639,158,000		7,638,443,000
Face amount of Credit Facility Debt	8,669,640,000		8,557,298,000
Carrying value of Credit Facility Debt	8,603,632,000		8,488,017,000
Finance Lease, Liability	241,909,000		244,595,000
Long-term debt	24,997,611,000		26,587,733,000
Debt	373,174,000		2,075,077,000
Finance Lease, Liability, Current	128,369,000		129,657,000
Long-term debt, net of current maturities	24,624,437,000		24,512,656,000
Repayments of line of credit	268,936,000	$ 329,688,000
Gain on extinguishment of debt and write-off of deferred financing costs	4,393,000	$ 0
Loans Payable
Debt Instrument [Line Items]
Principal amount			127,496,000
Long-term debt	168,157,000		127,496,000
Short-term Debt
Debt Instrument [Line Items]
Principal amount	373,174,000		2,087,813,000
Debt	373,174,000		2,075,077,000
Credit Facility [Domain]
Debt Instrument [Line Items]
Principal amount			71,643,000
Debt	76,648,000		71,643,000
Incremental Term Loan B-3 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 525,696,000		527,014,000
Stated interest rate	6.934%
Credit facility	$ 524,666,000		525,883,000
Incremental Term Loan B-5 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 2,910,000,000		2,917,500,000
Stated interest rate	7.184%
Credit facility	$ 2,896,201,000		2,902,921,000
Loans Payable
Debt Instrument [Line Items]
Principal amount	168,296,000		127,635,000
Long-term debt	168,296,000		127,635,000
CSC Holdings Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount	$ 1,700,000,000		1,575,000,000
Stated interest rate	7.177%
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,475,000,000
Credit facility	$ 1,695,951,000		1,570,730,000
Secured Debt [Member] | 5.5% Notes due April 15, 2027
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.50%
Principal amount	$ 1,310,000,000		1,310,000,000
Carrying Amount	$ 1,307,241,000		1,307,091,000
Secured Debt [Member] | 5.375% Senior Guaranteed Notes Due February 1, 2028
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.375%
Principal amount	$ 1,000,000,000		1,000,000,000
Carrying Amount	$ 995,286,000		995,078,000
Secured Debt [Member] | CSC Holdings 6.500% Notes due February 1, 2029
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.50%
Principal amount	$ 1,750,000,000		1,750,000,000
Carrying Amount	1,747,868,000		1,747,795,000
Long-term Debt
Debt Instrument [Line Items]
Principal amount	24,693,171,000		24,588,732,000
Long-term debt, net of current maturities	$ 24,624,437,000		24,512,656,000
Senior Notes | 5.25% Notes due June 1, 2024
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.25%
Principal amount	$ 750,000,000		750,000,000
Carrying Amount	$ 730,273,000		726,343,000
Senior Notes | CSC Holdings 7.500% Notes due April 1, 2028
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Principal amount	$ 1,045,882,000		1,045,882,000
Carrying Amount	$ 1,044,794,000		1,044,752,000
Senior Notes | 8.0% Notes due April 15, 2020
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.375%
Principal amount	$ 1,000,000,000		1,000,000,000
Carrying Amount	$ 997,330,000		997,258,000
Senior Notes | Cablevision 7.500% Notes due April 1, 2028
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Principal amount	$ 4,118,000		4,118,000
Carrying Amount	$ 4,114,000		4,113,000
Senior Notes | CSC Holdings 5.750% Notes due January 15, 2030
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.75%
Principal amount	$ 2,250,000,000		2,250,000,000
Carrying Amount	$ 2,278,620,000		$ 2,279,483,000