SUPPLEMENTAL SCHEDULES (Details) - 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	Dec. 31, 2023	Dec. 31, 2022
Balance Sheet Related Disclosures [Abstract]
Current assets	$ 865,333						$ 865,333		$ 834,794
Total assets	31,834,376						31,834,376		31,923,616
Current liabilities	2,125,050						2,125,050		2,308,124
Long-term debt, net of current maturities	24,778,868						24,778,868		24,715,554
Total liabilities	32,256,953						32,256,953		32,358,034
Noncontrolling interests	4,535						4,535		(12,238)
Total liabilities and stockholders' deficiency	31,834,376						31,834,376		31,923,616
Income Statement [Abstract]
Revenue	2,227,700			$ 2,317,200			6,719,390	$ 6,935,452
Operating income	444,593			492,565			1,339,329	1,399,678
Other expense, net	(495,320)			(389,714)			(1,329,313)	(1,100,416)
Income (loss) before income taxes	(50,727)			102,851			10,016	299,262
Income tax benefit (expense)	9,892			(27,336)			(42,045)	(106,433)
Net income (loss)	(40,835)			75,515			(32,029)	192,829
Net loss (income) attributable to noncontrolling interests	(2,135)	$ (6,341)	$ (8,297)	(8,676)	$ (7,844)	$ (5,305)	(16,773)	(21,825)
Net income (loss) attributable to CSC Holdings, LLC sole member	(42,970)	15,361	(21,193)	66,839	78,300	25,865	(48,802)	171,004
Restricted Group
Balance Sheet Related Disclosures [Abstract]
Current assets	859,205						859,205
Long term assets	29,495,697						29,495,697
Total assets	30,354,902						30,354,902
Current liabilities	2,116,626						2,116,626
Long-term debt, net of current maturities	23,360,178						23,360,178
Long-term liabilities	5,180,005						5,180,005
Total liabilities	30,656,809						30,656,809
Total member's deficiency	(301,907)						(301,907)
Noncontrolling interests	0						0
Total Deficiency	(301,907)						(301,907)
Total liabilities and stockholders' deficiency	30,354,902						30,354,902
Income Statement [Abstract]
Revenue	2,113,045			2,209,242			6,379,353	6,614,694
Operating expenses	1,705,583			1,749,304			5,142,144	5,319,527
Operating income	407,462			459,938			1,237,209	1,295,167
Other expense, net	(463,125)			(389,357)			(1,259,799)	(1,078,620)
Income (loss) before income taxes	(55,663)			70,581			(22,590)	216,547
Income tax benefit (expense)	10,728			(23,606)			(37,573)	(90,854)
Net income (loss)	(44,935)			46,975			(60,163)	125,693
Net loss (income) attributable to noncontrolling interests	0			(667)			0	(1,881)
Net income (loss) attributable to CSC Holdings, LLC sole member	(44,935)			46,308			(60,163)	123,812
Unrestricted Group
Balance Sheet Related Disclosures [Abstract]
Current assets	118,265						118,265
Long term assets	1,501,622						1,501,622
Total assets	1,619,887						1,619,887
Current liabilities	202,698						202,698
Long-term debt, net of current maturities	1,418,690						1,418,690
Long-term liabilities	123,167						123,167
Total liabilities	1,744,555						1,744,555
Total member's deficiency	(129,380)						(129,380)
Noncontrolling interests	4,712						4,712
Total Deficiency	(124,668)						(124,668)
Total liabilities and stockholders' deficiency	1,619,887						1,619,887
Income Statement [Abstract]
Revenue	116,754			108,886			346,118	326,036
Operating expenses	80,436			76,271			244,833	221,559
Operating income	36,318			32,615			101,285	104,477
Other expense, net	(31,999)			(16,789)			(67,686)	(19,877)
Income (loss) before income taxes	4,319			15,826			33,599	84,600
Income tax benefit (expense)	(664)			(3,730)			(4,300)	(15,579)
Net income (loss)	3,655			12,096			29,299	69,021
Net loss (income) attributable to noncontrolling interests	(2,357)			(8,862)			(18,446)	(22,619)
Net income (loss) attributable to CSC Holdings, LLC sole member	1,298			3,234			10,853	46,402
Eliminations
Balance Sheet Related Disclosures [Abstract]
Current assets	(118,481)						(118,481)
Long term assets	(13,334)						(13,334)
Total assets	(131,815)						(131,815)
Current liabilities	(121,535)						(121,535)
Long-term debt, net of current maturities	0						0
Long-term liabilities	(10,017)						(10,017)
Total liabilities	(131,552)						(131,552)
Total member's deficiency	(86)						(86)
Noncontrolling interests	(177)						(177)
Total Deficiency	(263)						(263)
Total liabilities and stockholders' deficiency	(131,815)						(131,815)
Income Statement [Abstract]
Revenue	(2,099)			(928)			(6,081)	(5,278)
Operating expenses	(2,110)			(940)			(6,114)	(5,312)
Operating income	11			12			33	34
Other expense, net	(256)			16,432			(1,888)	(1,919)
Income (loss) before income taxes	(245)			16,444			(1,855)	(1,885)
Income tax benefit (expense)	0			0			0	0
Net income (loss)	(245)			16,444			(1,855)	(1,885)
Net loss (income) attributable to noncontrolling interests	222			853			1,673	2,675
Net income (loss) attributable to CSC Holdings, LLC sole member	(23)			17,297			(182)	790
CSC Holdings
Balance Sheet Related Disclosures [Abstract]
Current assets	858,989						858,989		834,787
Long term assets	30,983,985						30,983,985
Total assets	31,842,974						31,842,974		31,923,609
Current liabilities	2,197,789						2,197,789		2,308,125
Long-term debt, net of current maturities	24,778,868						24,778,868		24,715,554
Long-term liabilities	5,293,155						5,293,155
Total liabilities	32,269,812						32,269,812		32,361,534
Total member's deficiency	(431,373)						(431,373)		(425,687)
Noncontrolling interests	4,535						4,535		(12,238)
Total Deficiency	(426,838)	(400,201)	(438,611)	(329,981)	(411,773)	(511,504)	(426,838)	(329,981)	(437,925)	$ (512,552)
Total liabilities and stockholders' deficiency	31,842,974						31,842,974		$ 31,923,609
Income Statement [Abstract]
Revenue	2,227,700			2,317,200			6,719,390	6,935,452
Operating expenses	1,783,909			1,824,635			5,380,863	5,535,774
Operating income	443,791			492,565			1,338,527	1,399,678
Other expense, net	(495,380)			(389,714)			(1,329,373)	(1,100,416)
Income (loss) before income taxes	(51,589)			102,851			9,154	299,262
Income tax benefit (expense)	10,064			(27,336)			(41,873)	(106,433)
Net income (loss)	(41,525)			75,515			(32,719)	192,829
Net loss (income) attributable to noncontrolling interests	(2,135)	(6,341)	(8,297)	(8,676)	(7,844)	(5,305)	(16,773)	(21,825)
Net income (loss) attributable to CSC Holdings, LLC sole member	$ (43,660)	$ 15,361	$ (21,193)	$ 66,839	$ 78,300	$ 25,865	$ (49,492)	$ 171,004