CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (40,835)			$ 75,515			$ (32,029)	$ 192,829
Defined benefit pension plans
Defined benefit pension plans	(1,293)			2,417			8,141	9,825
Applicable income taxes	350			(653)			(2,200)	(2,657)
Defined benefit pension plans, net of income taxes	(943)			1,764			5,941	7,168
Foreign currency translation adjustment	414			(2,026)			(403)	(1,474)
Other comprehensive income	(529)			(262)			5,538	5,694
Comprehensive income (loss)	(41,364)			75,253			(26,491)	198,523
Net loss (income) attributable to noncontrolling interests	(2,135)	$ (6,341)	$ (8,297)	(8,676)	$ (7,844)	$ (5,305)	(16,773)	(21,825)
Comprehensive income (loss) attributable to Altice USA, Inc. stockholders	$ (43,499)			$ 66,577			$ (43,264)	$ 176,698