CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenue (including revenue from affiliates of $3,974, $2,575 and $1,100 respectively) (See Note 16)	$ 9,760,859	$ 9,566,608	$ 9,306,950
Operating expenses:
Programming and other direct costs	3,300,528	3,173,076	3,035,655
Other operating expenses (including charges from affiliates of $8,355, $16,307 and $33,140 respectively) (See Note 16)	2,300,398	2,290,266	2,347,315
Restructuring and other expense	72,978		152,401
Depreciation and amortization (including impairments)	2,263,144	2,382,339	2,930,571
Total operating expenses	7,937,048	7,884,229	8,465,942
Operating income	1,823,811	1,682,379	841,008
Other income (expense):
Interest expense (including interest expense to affiliates and related parties of $600 and $90,405 in 2018 and 2017, respectively) (See Note 16)	(1,536,559)	(1,556,282)	(1,603,132)
Interest income	5,709	10,856	1,921
Gain (loss) on investments and sale of affiliate interests, net	473,406	(250,877)	237,354
Gain (loss) on derivative contracts, net	(282,713)	218,848	(236,330)
Gain (loss) on interest rate swap contracts	(53,902)	(61,697)	5,482
Loss on extinguishment of debt and write-off of deferred financing costs (including $513,723 related to affiliates and related parties in 2017) (See Note 16)	(243,806)	(48,804)	(600,240)
Other income (expense), net	1,183	(12,484)	(13,651)
Total other income (expense)	(1,636,682)	(1,700,440)	(2,208,596)
Loss before income taxes	187,129	(18,061)	(1,367,588)
Income tax benefit	(47,190)	38,655	2,862,352
Net income	139,939	20,594	1,494,764
Net income attributable to noncontrolling interests	(1,003)	(1,761)	(1,587)
Net income attributable to Altice USA, Inc. stockholders	$ 138,936	$ 18,833	$ 1,493,177
Income per share:
Earnings Per Share, Basic	$ 0.21	$ 0.03	$ 2.15
Basic weighted average common shares (in thousands)	660,384	730,088	696,055
Earnings Per Share, Diluted	$ 0.21	$ 0.03	$ 2.15
Weighted Average Number of Shares Outstanding, Diluted	662,541	730,088	696,055
Cash dividends declared per common share (in dollars per share)	$ 0	$ 2.035	$ 1.29