DEBT - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Debt Instrument [Line Items]
Proceeds from long-term debt	$ 3,875,000,000	$ 2,350,000,000
Repayments of line of credit	3,891,175,000	$ 2,215,112,000
Principal Amount	25,100,746,000		$ 25,126,605,000
Supply chain financing arrangement credit limit	175,000,000
2027 Revolving Credit Commitments
Debt Instrument [Line Items]
Line of credit facility, periodic payment amount	95,000
2025 Revolving Credit Commitments
Debt Instrument [Line Items]
Line of credit facility, periodic payment amount	20,000
CSC Holdings 11.7400% Senior Guaranteed Notes due Jan 31, 2029 | Secured Debt [Member]
Debt Instrument [Line Items]
Principal Amount	$ 2,050,000,000
Stated interest rate	11.75%
CSC Holdings Term Loans B and B-3
Debt Instrument [Line Items]
Write-off of deferred financings costs	$ 2,598,000
5.25% Notes due June 1, 2024
Debt Instrument [Line Items]
Stated interest rate	5.25%
Write-off of deferred financings costs	$ 4,437,000
Revolving Credit Facility | CSC Holdings Revolving Credit Facility
Debt Instrument [Line Items]
Proceeds from long-term debt	1,825,000
Repayments of line of credit	950,000
Principal Amount	1,700,000,000		825,000,000
Line of Credit Facility, Maximum Borrowing Capacity	2,475,000
Revolving Credit Facility | Cablevision Lightpath Revolving Credit Facility
Debt Instrument [Line Items]
Principal Amount	0		0
Line of Credit Facility, Increase (Decrease), Net	15,000
Line of Credit Facility, Maximum Borrowing Capacity	115,000
Secured Debt [Member] | Cablevision Lightpath Term B Loan
Debt Instrument [Line Items]
Principal Amount	$ 577,500,000		$ 582,000,000
Secured Debt [Member] | Cablevision Lightpath Term B Loan | Alternate base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Secured Debt [Member] | Cablevision Lightpath Term B Loan | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%