CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Accounts receivable, trade allowance for doubtful accounts	$ 27,931	$ 25,198
Due from Related Parties, Current	3,776
Property, plant and equipment, accumulated depreciation	7,142,852	6,431,843
Amortizable intangible assets, accumulated amortization	5,051,149	4,409,312
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Due to Affiliate, Current	$ 31,810	$ 8,538
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 outstanding (in shares)	0	0
Treasury Stock, Shares, Acquired	20,887	6,629,415
CSC Holdings
ASSETS
Accounts receivable, trade allowance for doubtful accounts	$ 27,931	$ 25,198
Due from Related Parties, Current		4,262
Property, plant and equipment, accumulated depreciation	7,142,852	6,431,843
Amortizable intangible assets, accumulated amortization	(5,051,149)	(4,409,312)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Due to Affiliate, Current	$ 31,810	$ 8,538
Common Class A
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000
Common stock, shares issued (in shares)	270,341,685	297,203,087
Common stock, shares outstanding (in shares)	270,320,798	290,573,672
Common Class B
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000
Common stock, shares issued (in shares)	490,086,674
Common stock, shares outstanding (in shares)	184,333,342	185,895,903
Common Class C
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock, par value (in dollars per share)	$ 0.01
Common stock, shares authorized (in shares)	4,000,000,000
Common stock, shares outstanding (in shares)	0