SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Stock by Class (Details) - shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
CSC Holdings
Common Stock Outstanding Roll Forward [Roll Forward]
Membership units outstanding	100	100
Common Class A
Common Stock Outstanding Roll Forward [Roll Forward]
Beginning balance common stock, shares outstanding (in shares)	278,980,530	271,772,978
Conversion of Class B common stock to Class A common stock	1,204,184	413
Issuance of common shares in connection with the vesting of restricted stock units	7,228,933	5,224,768
Ending balance common stock, shares outstanding (in shares)	287,413,647	278,980,530
Issuance of common shares in connection with the vesting of deferred cash awards, net of shares recorded as Treasury stock		1,982,371
Common Class B
Common Stock Outstanding Roll Forward [Roll Forward]
Beginning balance common stock, shares outstanding (in shares)	184,224,015	184,224,428
Conversion of Class B common stock to Class A common stock	(1,204,184)	(413)
Issuance of common shares in connection with the vesting of restricted stock units	0	0
Ending balance common stock, shares outstanding (in shares)	183,019,831	184,224,015
Issuance of common shares in connection with the vesting of deferred cash awards, net of shares recorded as Treasury stock		0