CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Assets [Abstract]
Accounts receivable, trade allowance for doubtful accounts	$ 27,945	$ 27,931
Due from Related Parties, Current	3,830	3,776
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(7,362,691)	(7,142,852)
Finite-Lived Intangible Assets, Accumulated Amortization	$ 5,198,304	$ 5,051,149
Stockholders' Deficiency:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Treasury Stock, Shares, Acquired	20,209
Other assets	$ 129,013	$ 76,653
Accumulated other comprehensive income	8,170	6,497
CSC Holdings
LIABILITIES AND STOCKHOLDERS' DEFICIENCY
Due to Affiliate, Current	22,872	31,810
Stockholders' Deficiency:
Other assets	129,013	76,653
Accumulated other comprehensive income	$ 8,170	$ 6,497
Common Class A
Stockholders' Deficiency:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000	4,000,000,000
Common stock, shares issued (in shares)	270,344,035	270,341,685
Common stock, shares outstanding (in shares)	270,323,826	270,320,798
Common Class B
Stockholders' Deficiency:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	490,086,674
Common stock, shares outstanding (in shares)	184,330,992	184,333,342
Common Class C
Stockholders' Deficiency:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000	4,000,000,000
Common stock, shares issued (in shares)	0	0
Common stock, shares outstanding (in shares)	0	0