SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Non-Cash Investing and Financing Activities:
Property and equipment accrued but unpaid	$ 323,815	$ 266,995
Notes payable issued for the purchase of equipment and other assets	35,070	0
Unsettled purchases of shares of Altice USA, Inc. Class A common stock, pursuant to a share repurchase program	0	18,942
Right-of-use assets acquired in exchange for finance lease obligations	47,288	38,348
Supplemental Data:
Cash interest paid	313,024	310,878
Income taxes paid, net	23,042	9,727
CSC Holdings
Non-Cash Investing and Financing Activities:
Distributions to parent	$ 0	$ 745