CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 195,711	$ 278,422
Restricted cash	264	264
Accounts receivable, trade (less allowance for doubtful accounts of $27,931 and $25,198)	406,952	442,581
Prepaid expenses and other current assets ($3,776 and $4,262 due from affiliates)	186,707	255,299
Total current assets	789,634	976,566
Property, plant and equipment, net of accumulated depreciation of $7,142,852 and $6,431,843	6,340,467	5,805,996
Right-of-use operating lease assets	222,124	241,342
Investment securities pledged as collateral	2,161,937	2,250,854
Other assets	76,653	92,203
Amortizable intangibles, net of accumulated amortization of $5,051,149 and $4,409,312	2,202,001	2,781,116
Indefinite-lived cable television franchises	13,216,355	13,068,017
Goodwill	8,205,863	8,160,566
Total assets	33,215,034	33,376,660
Current Liabilities:
Accounts payable	1,023,045	795,576
Interest payable	244,934	252,060
Accrued employee related costs	124,941	142,116
Deferred revenue	94,943	109,798
Debt	917,313	1,245,713
Other current liabilities ($31,810 and $8,538 due to affiliates)	329,943	552,840
Total current liabilities	2,735,119	3,098,103
Other liabilities	159,082	192,563
Deferred tax liability	5,048,129	5,006,167
Liabilities under derivative contracts	276,933	523,150
Right-of-use operating lease liability	237,226	257,424
Long-term debt, net of current maturities	25,629,447	25,476,629
Total liabilities	34,085,936	34,554,036
Redeemable equity	0	25,763
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred stock, $0.01 par value, 100,000,000 shares authorized, no shares issued and outstanding	0	0
Paid-in capital	18,005	0
Retained Earnings (Accumulated Deficit)	(848,836)	(985,641)
Total stockholders' equity before accumulated other comprehensive Income and non-controlling interest	(826,285)	(980,810)
Treasury stock, at cost (20,887 and 6,629,415 Class A common shares at December 31, 2021 and 2020, respectively)	0	163,866
Accumulated other comprehensive income	6,497	3,646
Total Altice USA stockholders' deficiency	(819,788)	(1,141,030)
Noncontrolling interests	(51,114)	(62,109)
Total stockholders' deficiency	(870,902)	(1,203,139)
Total liabilities and member's deficiency	$ 33,215,034	$ 33,376,660
Treasury Stock, Shares, Acquired	20,887	6,629,415
Less accumulated depreciation and amortization	$ (7,142,852)	$ (6,431,843)
Accumulated Amortization	(5,051,149)	(4,409,312)
Common Class A
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common Stock, Value, Issued	2,703	2,972
Common Class B
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common Stock, Value, Issued	1,843	1,859
Common Class C
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common Stock, Value, Issued	0	0
CSC Holdings
Current Assets:
Cash and cash equivalents	193,154	277,938
Restricted cash	264	264
Accounts receivable, trade (less allowance for doubtful accounts of $27,931 and $25,198)	406,952	442,581
Prepaid expenses and other current assets ($3,776 and $4,262 due from affiliates)	186,707	255,299
Total current assets	787,077	976,082
Property, plant and equipment, net of accumulated depreciation of $7,142,852 and $6,431,843	6,340,467	5,805,996
Right-of-use operating lease assets	222,124	241,342
Investment securities pledged as collateral	2,161,937	2,250,854
Other assets	76,653	92,203
Amortizable intangibles, net of accumulated amortization of $5,051,149 and $4,409,312	2,202,001	2,781,116
Indefinite-lived cable television franchises	13,216,355	13,068,017
Goodwill	8,205,863	8,160,566
Total assets	33,212,477	33,376,176
Current Liabilities:
Accounts payable	1,023,045	795,576
Interest payable	244,934	252,060
Accrued employee related costs	124,941	142,116
Deferred revenue	94,943	109,798
Debt	917,313	1,245,713
Other current liabilities ($31,810 and $8,538 due to affiliates)	329,944	552,372
Total current liabilities	2,735,120	3,097,635
Other liabilities	159,082	192,563
Deferred tax liability	5,067,442	5,033,980
Liabilities under derivative contracts	276,933	523,150
Right-of-use operating lease liability	237,226	257,424
Long-term debt, net of current maturities	25,629,447	25,476,629
Total liabilities	34,105,250	34,581,381
Redeemable equity	0	25,763
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Accumulated other comprehensive income	6,497	3,646
Noncontrolling interests	(51,114)	(62,109)
Total liabilities and member's deficiency	33,212,477	33,376,176
Less accumulated depreciation and amortization	(7,142,852)	(6,431,843)
Accumulated Amortization	$ 5,051,149	$ 4,409,312