CSC HOLDINGS - CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 1,012,201,000	$ 256,534,000
Restricted cash	107,384,000	290,000
Accounts receivable, trade (less allowance for credit losses of $35,389 and $24,232, respectively)	335,820,000	332,271,000
Prepaid expenses and other current assets ($2,821 and $905 due from affiliates, respectively)	189,391,000	141,897,000
Total current assets	1,644,796,000	730,992,000
Property, plant and equipment, net of accumulated depreciation of $9,835,958 and $8,762,014, respectively	8,351,391,000	8,414,632,000
Right-of-use operating lease assets	243,626,000	248,013,000
Other assets	120,341,000	94,403,000
Finite-Lived Intangible Assets, Net	702,467,000	960,805,000
Indefinite-lived cable franchise rights	11,600,000,000	13,211,308,000	$ 13,216,355,000	$ 13,216,355,000
Goodwill	8,041,217,000	8,041,217,000	8,044,716,000	8,208,773,000
Total assets	30,703,838,000	31,701,370,000
Liabilities, Current [Abstract]
Accounts payable	816,860,000	971,499,000
Interest payable	413,709,000	406,208,000
Accrued employee related costs	206,192,000	191,990,000
Deferred revenue	147,139,000	74,167,000
Long-Term Debt, Current Maturities	60,842,000	185,473,000
Other current liabilities	406,280,000	425,459,000
Liabilities, Current, Total	2,051,022,000	2,254,796,000
Other liabilities	316,398,000	320,435,000
Deferred tax liability	4,232,867,000	4,455,840,000
Right-of-use operating lease liability	250,407,000	255,116,000
Long-term debt, net of current maturities	26,145,372,000	24,872,015,000
Liabilities, Total	32,996,066,000	32,158,202,000
Limited Liability Company (LLC) Members' Equity [Abstract]
Accumulated other comprehensive income (loss)	1,604,000	(3,826,000)
Noncontrolling interests	21,928,000	12,403,000
Total stockholders' deficiency	(2,292,228,000)	(456,832,000)	(434,418,000)	(503,912,000)
Total liabilities and member's deficiency	30,703,838,000	31,701,370,000
Related Party
Current Assets:
Prepaid expenses and other current assets ($2,821 and $905 due from affiliates, respectively)	475,000	314,000
Liabilities, Current [Abstract]
Other current liabilities	27,029,000	26,944,000
CSC Holdings
Current Assets:
Cash and cash equivalents	1,001,919,000	246,326,000
Restricted cash	107,384,000	290,000
Accounts receivable, trade (less allowance for credit losses of $35,389 and $24,232, respectively)	335,820,000	332,271,000
Prepaid expenses and other current assets ($2,821 and $905 due from affiliates, respectively)	191,909,000	142,694,000
Total current assets	1,637,032,000	721,581,000
Property, plant and equipment, net of accumulated depreciation of $9,835,958 and $8,762,014, respectively	8,351,391,000	8,414,632,000
Right-of-use operating lease assets	243,626,000	248,013,000
Other assets	132,205,000	108,855,000
Finite-Lived Intangible Assets, Net	702,467,000	960,805,000
Indefinite-lived cable franchise rights	11,600,000,000	13,211,308,000
Goodwill	8,041,217,000	8,041,217,000
Total assets	30,707,938,000	31,706,411,000
Liabilities, Current [Abstract]
Long-Term Debt, Current Maturities	60,842,000	185,473,000
Other current liabilities	388,298,000	407,540,000
Liabilities, Current, Total	2,115,540,000	2,327,377,000
Other liabilities	268,802,000	255,683,000
Deferred tax liability	4,232,867,000	4,455,840,000
Right-of-use operating lease liability	250,407,000	255,116,000
Long-term debt, net of current maturities	26,145,372,000	24,872,015,000
Liabilities, Total	33,012,988,000	32,166,031,000
Limited Liability Company (LLC) Members' Equity [Abstract]
Member's deficiency (100 membership units issued and outstanding)	(2,328,582,000)	(468,197,000)
Accumulated other comprehensive income (loss)	1,604,000	(3,826,000)
Total member's deficiency	(2,326,978,000)	(472,023,000)
Noncontrolling interests	21,928,000	12,403,000
Total stockholders' deficiency	(2,305,050,000)	(459,620,000)	$ (437,925,000)	$ (512,552,000)
Total liabilities and member's deficiency	30,707,938,000	31,706,411,000
CSC Holdings | Related Party
Current Assets:
Prepaid expenses and other current assets ($2,821 and $905 due from affiliates, respectively)	2,821,000	905,000
Liabilities, Current [Abstract]
Accounts payable	816,860,000	971,499,000
Interest payable	413,709,000	406,208,000
Accrued employee related costs	206,192,000	191,990,000
Deferred revenue	147,139,000	74,167,000
Note payable to the Captive		$ 90,500,000
Other current liabilities	$ 26,944,000