Restricted Group Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Condensed Balance Sheet Statements, Captions [Line Items]
Total current assets	$ 1,644,796	$ 730,992
Total assets	30,703,838	31,701,370
Total current liabilities	2,051,022	2,254,796
Long-term debt, net of current maturities	26,145,372	24,872,015
Liabilities	32,996,066	32,158,202
Noncontrolling interests	21,928	12,403
Liabilities and Equity	30,703,838	31,701,370
CSC Holdings
Condensed Balance Sheet Statements, Captions [Line Items]
Total current assets	1,637,032	721,581
Assets, long term	29,070,906	30,984,830
Total assets	30,707,938	31,706,411
Total current liabilities	2,115,540	2,327,377
Long-term debt, net of current maturities	26,145,372	24,872,015
Liabilities, Other than Long-Term Debt, Noncurrent	4,752,076	4,966,639
Liabilities	33,012,988	32,166,031
Membership equity before noncontrolling interest	(2,326,978)	(472,023)
Noncontrolling interests	21,928	12,403
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	(2,305,050)	(459,620)
Liabilities and Equity	30,707,938	31,706,411
CSC Holdings Restricted Group
Condensed Balance Sheet Statements, Captions [Line Items]
Total current assets	1,627,555	773,050
Assets, long term	9,067,171	10,782,713
Total assets	10,694,726	11,555,763
Total current liabilities	1,104,672	1,314,432
Long-term debt, net of current maturities	21,841,184	23,344,591
Liabilities, Other than Long-Term Debt, Noncurrent	3,007,478	3,185,142
Liabilities	25,953,334	27,844,165
Membership equity before noncontrolling interest	(15,258,608)	(16,288,402)
Noncontrolling interests	0	0
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	(15,258,608)	(16,288,402)
Liabilities and Equity	10,694,726	11,555,763
Unrestricted Group
Condensed Balance Sheet Statements, Captions [Line Items]
Total current assets	433,473	358,100
Assets, long term	20,005,634	20,203,037
Total assets	20,439,107	20,561,137
Total current liabilities	1,448,584	1,434,428
Long-term debt, net of current maturities	4,304,188	1,527,424
Liabilities, Other than Long-Term Debt, Noncurrent	1,752,947	1,786,638
Liabilities	7,505,719	4,748,490
Membership equity before noncontrolling interest	12,905,013	15,796,020
Noncontrolling interests	28,375	16,627
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	12,933,388	15,812,647
Liabilities and Equity	20,439,107	20,561,137
Consolidation, Eliminations
Condensed Balance Sheet Statements, Captions [Line Items]
Total current assets	(423,996)	(409,569)
Assets, long term	(1,899)	(920)
Total assets	(425,895)	(410,489)
Total current liabilities	(437,716)	(421,483)
Long-term debt, net of current maturities	0	0
Liabilities, Other than Long-Term Debt, Noncurrent	(8,349)	(5,141)
Liabilities	(446,065)	(426,624)
Membership equity before noncontrolling interest	26,617	20,359
Noncontrolling interests	(6,447)	(4,224)
Limited Liability Company (LLC) Members' Equity, Including Portion Attributable to Noncontrolling Interest	20,170	16,135
Liabilities and Equity	$ (425,895)	$ (410,489)