CSC HOLDINGS - CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue (including revenue from affiliates of $2,205 and $1,086, respectively) (See Note 14)	$ 2,474,979	$ 2,451,081	$ 4,925,235	$ 4,847,648
Operating expenses:
Cost of Goods and Services Sold	860,875	818,994	1,725,389	1,631,979
Other operating expenses	542,637	569,459	1,124,946	1,133,891
Restructuring and other expense	40,966	11,465	48,260	26,709
Depreciation and amortization (including impairments)	521,794	568,620	1,069,363	1,130,048
Total operating expenses	1,966,272	1,968,538	3,967,958	3,922,627
Operating income	508,707	482,543	957,277	925,021
Other income (expense):
Interest expense	(351,025)	(381,218)	(716,236)	(769,501)
Interest income	151	605	1,810	2,424
Loss on interest rate swap contracts, net	(33,735)	(26,900)	(88,567)	(50,572)
Gain (loss) on investments and sale of affiliate interests, net	197,597	103,146	(257,876)	357,871
Loss on equity derivative contracts, net	(152,061)	(49,624)	287,800	(226,653)
Loss on extinguishment of debt and write-off of deferred financing costs	0	(1,194)	0	(159,096)
Other income, net	669	212	1,592	292
Total other income (expense)	(338,404)	(354,973)	(771,477)	(845,235)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	170,303	127,570	185,800	79,786
Income Tax Expense (Benefit)	(58,826)	(41,160)	(75,861)	(18,574)
Net income	111,477	86,410	109,939	61,212
Net loss (income) attributable to noncontrolling interests	(213)	(43)	467	156
Net income (loss) attributable to members	111,264	86,367	110,406	61,368
Other operating expenses from affiliates	2,161	2,020	6,102	4,266
Programming and other direct costs from affiliates	1,738	2,087	3,927	3,774
Revenue	3,379	496	6,867	1,088
Retained Earnings [Member]
Other income (expense):
Net income (loss) attributable to members		86,367
CSC Holdings
Revenue (including revenue from affiliates of $2,205 and $1,086, respectively) (See Note 14)	2,474,979	2,451,081	4,925,235	4,847,648
Operating expenses:
Cost of Goods and Services Sold	860,875	818,994	1,725,389	1,631,979
Other operating expenses	542,637	569,459	1,124,946	1,133,891
Restructuring and other expense	40,966	11,465	48,260	26,709
Depreciation and amortization (including impairments)	521,794	568,620	1,069,363	1,130,048
Total operating expenses	1,966,272	1,968,538	3,967,958	3,922,627
Operating income	508,707	482,543	957,277	925,021
Other income (expense):
Interest expense	(351,025)	(356,818)	(716,236)	(720,857)
Interest income	151	605	1,810	2,424
Loss on interest rate swap contracts, net	(33,735)	(26,900)	(88,567)	(50,572)
Gain (loss) on investments and sale of affiliate interests, net	197,596	103,146	(258,223)	357,871
Loss on equity derivative contracts, net	(152,061)	(49,624)	287,800	(226,653)
Loss on extinguishment of debt and write-off of deferred financing costs	0	(1,194)	0	(159,096)
Other income, net	669	212	1,592	292
Total other income (expense)	(338,405)	(330,573)	(771,824)	(796,591)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	170,302	151,970	185,453	128,430
Income Tax Expense (Benefit)	(56,629)	(47,828)	(61,658)	(32,152)
Net income	113,673	104,142	123,795	96,278
Net loss (income) attributable to noncontrolling interests	(213)	(43)	467	156
Net income (loss) attributable to members	113,460	104,099	10,802	$ 96,434
CSC Holdings | Retained Earnings [Member]
Other income (expense):
Net income (loss) attributable to members	$ 113,460	$ 104,099	$ 124,262