Subsequent Events	6 Months Ended
	Jun. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTSOn July 14, 2020, the Company completed its acquisition of certain cable assets in New Jersey for approximately $150,000, subject to certain closing adjustments as set forth in the asset purchase agreement. In July 2020, the Company entered into an agreement to sell 49.99% of its Lightpath fiber enterprise business for an implied enterprise value of $3,200,000. The Company will receive total gross cash proceeds of approximately $2,300,000 from the sale and related financing activity and will record a gain upon closing. Approximately $1,100,000 of the net proceeds after tax are expected to be used by the Company to repay debt such that the transaction is at least leverage-neutral to CSC Holdings. The Company will retain a 50.01% interest in Lightpath and maintain control. Accordingly, the Company will continue to consolidate the operating results of the Lightpath business. The transaction is currently expected to close in the fourth quarter of 2020 following the satisfaction of closing conditions, including receipt of necessary regulatory approvals. Upon closing, Lightpath will be financed independently outside of the CSC Holdings restricted group.