CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenue (including revenue from affiliates of $253 and $394 in 2017) (See Note 14)	$ 2,328,341	$ 823,501	$ 4,634,017	$ 1,451,090
Operating expenses:
Programming and other direct costs (including charges from affiliates of $1,095 and $1,830 in 2017) (See Note 14)	758,694	249,823	1,517,046	439,418
Other operating expenses (including charges from affiliates of $38,728 and $46,761 in 2017 and $2,500 and $5,000 in 2016) (See Note 14)	593,690	214,474	1,207,127	389,739
Restructuring and other expense	12,388	99,701	89,317	107,270
Depreciation and amortization (including impairments)	706,787	214,100	1,315,511	415,000
Total operating expenses	2,071,559	778,098	4,129,001	1,351,427
Operating income	256,782	45,403	505,016	99,663
Other income (expense):
Interest expense (including interest expense to affiliates and related parties of $42,817 and $90,405 in 2017 and $5,305 in 2016) (See Note 14)	(420,372)	(293,795)	(853,666)	(569,624)
Interest income	180	5,968	412	12,383
Gain on investments, net	57,130	58,634	188,788	58,634
Loss on equity derivative contracts, net	(66,463)	(27,345)	(137,507)	(27,345)
Gain on interest rate swap contracts	9,146	40,241	11,488	40,241
Loss on extinguishment of debt and write-off of deferred financing costs (including $513,723 related to affiliates and related parties) (See Note 14)	(561,382)	(19,948)	(561,382)	(19,948)
Other income, net	1,121	6	897	17
Total other income (expense)	(980,640)	(236,239)	(1,350,970)	(505,642)
Loss before income taxes	(723,858)	(190,836)	(845,954)	(405,979)
Income tax benefit (expense)	249,068	(91,293)	294,976	(16,898)
Net loss	(474,790)	(282,129)	(550,978)	(422,877)
Net loss (income) attributable to noncontrolling interests	(365)	364	(602)	364
Net loss attributable to Altice USA, Inc. stockholders	$ (475,155)	$ (281,765)	$ (551,580)	$ (422,513)
Basic and diluted net loss per share (in dollars per share)	$ (0.72)	$ (0.43)	$ (0.84)	$ (0.65)
Basic and diluted weighted average common shares (in shares)	659,145,164	649,525,000	654,361,628	649,524,942