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NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS	6 Months Ended
NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS	Jun. 30, 2018
Earnings Per Share [Abstract]
NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS	NET LOSS PER SHARE ATTRIBUTABLE TO STOCKHOLDERS Basic net loss per common share attributable to Altice USA stockholders is computed by dividing net loss attributable to Altice USA stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per common share attributable to Altice USA stockholders excludes the effects of common stock equivalents as they are anti-dilutive. The weighted average number of shares used to compute basic and diluted net loss per share for the three and six months ended June 30, 2017 reflect the retroactive impact of certain organizational transactions that occurred prior to the Company's IPO.