CHANGE IN ACCOUNTING POLICIES - Income Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	$ 10,090,849	$ 9,894,642	$ 9,760,859
Cost of Goods and Services Sold	3,382,129	3,340,442	3,300,528
Other Cost and Expense, Operating	2,379,765	2,264,473	2,300,398
Restructuring and other expense	17,176	91,073	72,978
Operating Income (Loss), Total	2,524,627	2,115,289	1,823,811
Total other income (expense)	(1,218,720)	(1,532,062)	(1,636,682)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	1,305,907	583,227	187,129
Income Tax Expense (Benefit)	(294,975)	(139,748)	(47,190)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,010,932	443,479	139,939
CSC Holdings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	10,090,849	9,894,642	9,760,859
Cost of Goods and Services Sold	3,382,129	3,340,442	3,300,528
Other Cost and Expense, Operating	2,379,765	2,264,473	2,300,398
Restructuring and other expense	17,176	91,073	72,978
Operating Income (Loss), Total	2,524,627	2,115,289	1,823,811
Total other income (expense)	(1,218,720)	(1,532,608)	(1,539,751)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	1,305,907	582,681	284,060
Income Tax Expense (Benefit)	(297,110)	(126,843)	(71,243)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,008,797	455,838	212,817
Pay TV [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	3,526,205	3,670,859	3,997,873
Broadband [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	3,925,089	3,689,159	3,222,605
Telephony [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	404,813	468,777	598,694
Business Services and Wholesale [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	1,586,044	1,454,532	1,428,532
Advertising and News [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	$ 550,667	$ 519,205	$ 475,904