CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (87,986)		$ 21,702		$ (159,257)	$ 8,806
Defined benefit pension plans
Defined benefit pension plans	4,511		3,609		2,971	9,434
Applicable income taxes	(1,216)		(980)		(801)	(2,550)
Defined benefit pension plans, net of income taxes	3,295		2,629		2,170	6,884
Foreign currency translation adjustment	938		(205)		884	(817)
Other comprehensive income (loss)	4,233		2,424		3,054	6,067
Comprehensive income (loss)	(83,753)		24,126		(156,203)	14,873
Net loss (income) attributable to noncontrolling interests	(8,265)	$ (4,405)	(6,341)	$ (8,297)	(12,670)	(14,638)
Comprehensive income (loss) attributable to Altice USA, Inc. stockholders	$ (92,018)		$ 17,785		$ (168,873)	$ 235