INCOME TAXES - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Federal tax expense (benefit) at statutory rate	$ (17,293)	$ 24,899	$ 108,513
State income taxes, net of federal impact	(66,814)	6,436	26,527
Minority interest	(5,662)	(5,494)	(5,914)
Changes in the valuation allowance	5,598	13,847	20,176
Change in New York state rate to measure deferred taxes, net of federal impact	0	0	112,117
Other changes in the state rates used to measure deferred taxes, net of federal impact	(5,350)	23,909	(9,603)
Unrecognized Tax Benefits, Period Increase (Decrease)	63,941	(14,311)	36,281
Tax credits	3,987	4,201	3,544
Excess tax deficiencies related to share-based compensation including non-deductible carried unit plans	12,353	11,696	10,321
Non-deductible officers compensation	3,027	3,934	4,916
Foreign losses of disregarded entities	(8,361)	(6,097)	6,352
Business dispositions	0	(46,591)	0
Goodwill impairment and other permanent differences	16,887	34,241	0
Other, net	1,590	(2,740)	2,402
Income tax expense (benefit)	(4,071)	39,528	295,840
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	279	326
Prepaid Expense and Other Assets, Current	141,897	174,859
Other Accrued Liabilities, Current	425,459	470,096
Related Party
Prepaid Expense and Other Assets, Current	314	407
Other Accrued Liabilities, Current	26,944	71,523
Altice Management Americas | Related Party
Prepaid Expense and Other Assets, Current	44	137
Other Related Party | Related Party
Prepaid Expense and Other Assets, Current	270	270
Altice Management International | Related Party
Other Accrued Liabilities, Current	26,944	71,523
CSC Holdings
Federal tax expense (benefit) at statutory rate	(17,995)	24,899	108,513
State income taxes, net of federal impact	(72,536)	9,842	28,768
Minority interest	(5,662)	(5,494)	(5,914)
Changes in the valuation allowance	7,821	14,099	15,494
Change in New York state rate to measure deferred taxes, net of federal impact	0	0	112,117
Other changes in the state rates used to measure deferred taxes, net of federal impact	(5,350)	23,300	(10,849)
Unrecognized Tax Benefits, Period Increase (Decrease)	63,941	(14,311)	36,281
Tax credits	3,987	4,201	3,544
Excess tax deficiencies related to share-based compensation including non-deductible carried unit plans	12,353	11,696	10,321
Non-deductible officers compensation	3,027	3,934	4,916
Foreign losses of disregarded entities	(8,361)	(6,097)	6,352
Business dispositions	0	(46,591)	0
Goodwill impairment and other permanent differences	16,887	34,241	0
Other, net	1,590	(2,740)	2,401
Income tax expense (benefit)	(8,272)	42,577	$ 292,152
Prepaid Expense and Other Assets, Current	142,694	174,859
Other Accrued Liabilities, Current	407,540	470,097
CSC Holdings | Related Party
Prepaid Expense and Other Assets, Current	905	407
Other Accrued Liabilities, Current	$ 26,944	$ 71,523