CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 1,010,932	$ 443,479	$ 139,939
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Defined benefit pension plans	4,772	12,333	13,806
Applicable income taxes	(1,259)	(3,270)	(4,109)
Foreign currency translation adjustment	(662)	(2,167)	(1,164)
Applicable income taxes	0	0	0
Defined benefit pension plans, net of income taxes	3,513	9,063	9,697
Foreign currency translation adjustment, net	(662)	(2,167)	(1,164)
Other comprehensive income	2,851	6,896	8,533
Comprehensive income	1,013,783	450,375	148,472
Comprehensive income attributable to noncontrolling interests	(20,621)	(7,296)	(1,003)
Comprehensive income attributable to Altice USA, Inc. stockholders	$ 993,162	$ 443,079	$ 147,469