CSC HOLDINGS - CONSOLIDATED STATEMENT OF MEMBER'S EQUITY - USD ($) $ in Thousands	Total	CSC Holdings	Parent [Member]	Parent [Member] CSC Holdings	Retained Earnings	Member's Equity (Deficiency)	Member's Equity (Deficiency) CSC Holdings	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) CSC Holdings	Non-controlling Interests	Non-controlling Interests CSC Holdings
Beginning balance at Dec. 31, 2022	$ (503,912)	$ (512,552)	$ (475,211)	$ (483,851)	$ (654,273)	$ 182,701	$ (475,650)	$ (8,201)	$ (8,201)	$ (28,701)	$ (28,701)
Net income attributable to CSC Holdings' sole member	(53,198)	(50,149)	(53,198)	(50,149)
Net income attributable to noncontrolling interests	25,839	25,839								25,839	25,839
Distributions to noncontrolling interests	1,077	1,077								1,077	1,077
Pension liability adjustments, net of income taxes	3,961	3,961	3,961	3,961				3,961	3,961
Foreign currency translation adjustment	697	697	689	689				689	689	(8)	(8)
Share-based compensation expense (equity classified)	19,090	19,090	19,090	19,090		19,090	19,090
Contributions from parent, net	8,183
Non-cash distributions to parent		(8,183)		(8,183)			(8,183)
Change in noncontrolling interest	(21,106)	21,106	(12,815)	(12,815)		(12,815)	(12,815)			8,291	8,291
Other	(1,792)		(1,792)			(1,790)
Cash distribution payments to Optimum Communications, net		(1,793)		(1,793)
Revenue	9,237,064	9,237,064
Programming and other direct costs (including charges from affiliates of $6,491, $11,645 and $13,794, respectively) (See Note 16)	3,029,842	3,029,842
Other Cost and Expense, Operating	2,646,258	2,646,258
Restructuring, impairments and other operating items	214,727	214,727
Depreciation and amortization	1,644,297	1,644,297
Interest expense, net	(1,639,120)	(1,639,120)
Gain on investments and sale of affiliate interests, net	180,237	180,237
Loss on derivative contracts, net	(166,489)	(166,489)
Gain on interest rate swap contracts, net	32,664	32,664
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	4,393	4,393
Other income (expense), net	4,940	4,940
Income tax benefit (expense)	(39,528)	(42,577)
Transfer of a business to an entity under common control	0
Ending balance at Dec. 31, 2023	(434,418)	(437,925)	(422,180)	(425,687)	(601,075)	187,186	(412,836)	(12,851)	(12,851)	(12,238)	(12,238)
Net income attributable to CSC Holdings' sole member	102,918	102,061	102,918	102,061
Net income attributable to noncontrolling interests	24,641	24,641								24,641	24,641
Pension liability adjustments, net of income taxes	(9,449)	(9,449)	(9,449)	(9,449)				(9,449)	(9,449)
Foreign currency translation adjustment	424	424	424	424				424	424	0	0
Share-based compensation expense (equity classified)	49,305	49,305	49,305	49,305		49,305	49,305
Contributions from parent, net	5,794
Non-cash distributions to parent		(5,794)		(5,794)			(5,794)
Other	(2,467)		(2,467)			(2,538)
Cash distribution payments to Optimum Communications, net		(8,399)		(8,399)
Revenue	8,954,417	8,954,417
Programming and other direct costs (including charges from affiliates of $6,491, $11,645 and $13,794, respectively) (See Note 16)	2,896,570	2,896,570
Other Cost and Expense, Operating	2,711,828	2,713,642
Restructuring, impairments and other operating items	23,696	23,696
Depreciation and amortization	1,642,231	1,642,231
Interest expense, net	(1,763,166)	(1,764,696)
Gain on investments and sale of affiliate interests, net	670	670
Loss on derivative contracts, net	0	0
Gain on interest rate swap contracts, net	18,632	18,632
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	(12,901)	(12,901)
Other income (expense), net	(5,675)	(5,675)
Income tax benefit (expense)	4,071	8,272
Transfer of a business to an entity under common control	0
Ending balance at Dec. 31, 2024	(456,832)	(459,620)	(469,235)	(472,023)	(703,993)	233,953	(468,197)	(3,826)	(3,826)	12,403	12,403
Net income attributable to CSC Holdings' sole member	1,869,024	1,881,356	1,869,024	1,881,356
Net income attributable to noncontrolling interests	35,977	35,977									35,977
Distributions to noncontrolling interests		26,452		(26,452)
Pension liability adjustments, net of income taxes	116	116	116	116				116	116
Foreign currency translation adjustment	(594)	(594)	(594)	(594)				(594)	(594)		0
Share-based compensation expense (equity classified)	45,131	45,131	45,131	45,131		45,131	45,131
Contributions from parent, net	43
Cash distributions to parent		9,695		9,695			9,695
Other	(11,993)		(11,993)			(12,066)
Cash distribution payments to Optimum Communications, net		(9,738)
Revenue	8,590,467	8,590,467
Programming and other direct costs (including charges from affiliates of $6,491, $11,645 and $13,794, respectively) (See Note 16)	2,637,181	2,637,181
Other Cost and Expense, Operating	2,681,740	2,691,793
Restructuring, impairments and other operating items	1,687,130	1,687,130
Depreciation and amortization	1,696,974	1,696,974
Interest expense, net	(1,791,462)	(1,797,008)
Gain on investments and sale of affiliate interests, net	5	5
Loss on derivative contracts, net	0	0
Gain on interest rate swap contracts, net	613	613
Gain (loss) on extinguishment of debt and write-off of deferred financing costs	(23,502)	(23,502)
Other income (expense), net	(3,051)	(3,051)
Income tax benefit (expense)	96,908	100,175
Transfer of a business to an entity under common control	9,513	(9,513)	9,513	(9,513)		14,465	(14,465)	(4,952)	(4,952)
Ending balance at Dec. 31, 2025	$ (2,292,228)	$ (2,305,050)	$ (2,314,156)	$ (2,326,978)	$ (2,573,017)	$ 252,553	$ (2,328,582)	$ 1,604	$ 1,604	$ 21,928	$ 21,928