DEBT - Schedule of Gain (Loss) on Debt Extinguishment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Loss on extinguishment of debt and write-off of deferred financing costs	$ 12,901	$ (4,393)	$ 575
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	(12,901)	4,393	(575)
CSC Holdings
Debt Instrument [Line Items]
Loss on extinguishment of debt and write-off of deferred financing costs	12,901	(4,393)	575
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	(12,901)	4,393	$ (575)
CSC Holdings Term Loan B | Secured Debt [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt and write-off of deferred financing costs	2,598	575
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	(2,598)	$ (575)
5.25% Notes due June 1, 2024 | Senior Notes
Debt Instrument [Line Items]
Loss on extinguishment of debt and write-off of deferred financing costs	4,437
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	(4,437)
Cablevision Lightpath Term B Loan | Secured Debt [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt and write-off of deferred financing costs	5,866
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	$ (5,866)